Petiole hydrangea, climbing liana: description, cultivation, reviews. Growing petiole hydrangea: planting and care in the garden
Petiole hydrangea is able to decorate the garden of anyone, as it is a unique weaving species. Its smell is easily confused with the smell of honey. And she is able to grow in harsh conditions. In this article, we will analyze in detail how to properly care for this.
Botanical description of petiole hydrangeas
In order for the hydrangea shoots to be more durable, it is recommended to water the plant with a weak solution of potassium permanganate (potassium permanganate). 
Such watering is a prevention against pests and diseases, although the plant itself is quite stable.
If you want the hydrangea to become stiff for the winter, stop feeding it with approvals from the beginning of August.
How to prune a hydrangea bush
New inflorescences appear on hydrangea bushes, mainly only on shoots that have grown this year. If you do not trim the bushes, then the plant gradually compacts, and the vine becomes neglected and neglected. Such a plant does not bloom well. The plant responds well to pruning. Also, the bush retains its shape well, which can be given when pruning. 
Basic rules for pruning a bush:
- Pruning only those bushes that are 3-4 years old.
- Pruning is carried out in early spring.
- Leave 6 to 10 strong shoots.
- Annual shoots are shortened, leaving 3-5 pairs of buds.
Did you know? All parts of the plant contain cyanogenic glycosides and are therefore considered poisonous.
Be sure to remove dry inflorescences for the winter. Thanks to this, the shrub will bloom magnificently next year.
Preservation of the plant in winter
This type of plant is very frost-resistant, it is grown even in Siberia. However, young vines in the first three years should still be covered for the winter, because young sprouts are likely to freeze. Young shoots need to be laid on boards and covered spruce branches or foliage. This is especially true for gardeners whose site is located in the northern latitudes. 
Reproduction of petiole hydrangea
Petiole hydrangea propagates like other garden crops:
- division;
- reproduction by layering.
If you choose the cutting method, you should use shoots of 15 cm in length, which have already become stiff. This breeding method is used in early summer. You need to cut off the top of the shoot, which has at least 2 nodes, and then remove a couple of lower leaves. 
Hydrangea petiolate, or curly, creeping (Hydrangea petiolaris) is an perfect choice for a low flowering hedge. The shrub loves shady places, can be grown as a ground cover on the north side. It will also grow by climbing a tall tree.
Description
Curly hydrangea comes from the forests of Japan, Korea and Taiwan. Braiding trees, the plant reaches 10-20 m in height, the annual growth is 0.5-1 m. It can grow up to 3.5 meters on the wall. The shrub has copper-brown shoots with flaky bark. The leaves grow on long petioles and reach a length of up to 10 cm. The leaves are elliptical in shape, covered with hairs below. Form a dense coating since April. In the summer they get green color, turn yellow in autumn, fall off in November. Hydrangea petiolate produces fragrant white or greenish flowers in large umbellate inflorescences (25 cm diameter). Blooms in June-July. In winter, buds are decoration.
Varieties
- "Miranda" (Miranda)- has jagged, heart-shaped, dark green leaves (up to 10 cm) with yellow edges. As they grow, the edges of the leaves may turn a creamy white color. Outside of flowering in June, the variety is attractive due to beautifully colored leaves. Liana is easy to grow and completely frost-resistant. It climbs walls and supports using adventitious roots - rather weak, it is better to use a grate. Blooms for a long time, from early June to early July.
- "Cordifolia" (Cordifolia) – dwarf variety. Grows up to 1-1.5 m tall. Annual growth - 10 cm. The leaves are rounded, 4-6 cm in diameter, green, shiny on the upper side, white-green on the lower side, serrated along the edges, planted on long petioles. The flowers are fertile - creamy in color, bloom in June - July. The variety is frost-resistant, undemanding, resistant to diseases and pests. Prefers wet and acidic soils, but not swampy, lighting - partial shade.
- "Silver Lining" (Silver Lining)- lush leaves with a white border, decorative flowers, delicate aroma. Regularly trimmed and shaped accordingly, attractive appearance throughout the season. Slow growth rate. Reaches 3-5 m, can rise to a height of up to 7 meters. Curls around supports, trellises, can be grown as a groundcover. Blooms in June-July. The flowers are delicate, sweet smelling of honey. Honey plant - attracts insects, especially bees and butterflies. Lighting, penumbra or shade. The substrate is moist to moderately moist with a slightly acidic pH. Withstands frost down to -30 °C.
Conditions
Curly hydrangea requires moist, fertile and permeable soil. Does not tolerate heavy, knocked down substrate. For healthy plant growth, the soil must be acidic (pH 5.5). Can be grown in slightly alkaline soil. Hydrangea loves moist air and shade, but will be able to grow in the sun. Requires a place protected from the wind. The shrub is resistant to air pollution, suitable for growing in cities and industrial areas. It tolerates frost well, does not require coating for the winter.
Landing
Hydrangea is planted in early spring or autumn, without leaves. It is necessary to carefully remove weeds from the place intended for planting the plant. The hole should be double more pot in which the plant grew before transplanting. Before planting, we loosen the bottom of the hole and place compost, manure or peat mixed with soil in a ratio of 1: 2. The soil on which we plant the hydrangea should be moist. The plant is watered before and after planting. If we plant near the wall, it is necessary to leave a distance of 30 cm so that the cornice does not limit the amount of precipitation. Creepers growing next to a rough wall will climb on their own. Can be hung between plant and wall plastic mesh with cells 10-15 cm wide and pin shoots to it, the mesh will affect the direction of growth of the vine. Fasten the first shoots to the net with a fishing line or cord, the rest will attach themselves. Hydrangea growing near the fence with time forms hedge. Do not plant near the net, the stems of the plant are quite heavy.
In the first years after planting, hydrangea will not give large gains. After 2-3 years, root system will be well developed, you can count on an increase of 1 m per year.
Care
An important method of care is the removal of shoots growing far beyond the support. Otherwise, the plant may fall off the wall. climbing plants do not require pruning. You can rejuvenate the plant by removing old shoots; after pruning, the plant grows faster. Diseased and deformed elements are removed. Pruning is done after the flowering period.
It is worth mulching the hydrangea immediately after planting, mulching good way limit water evaporation and the spread of weeds.
reproduction
This type of hydrangea is easiest to propagate by layering. External shoots, leaning towards the ground, are placed in holes 10-15 cm deep so that their tops stick out above the ground. These ends should be tied to stakes. The middle part of the shoots from which the roots are formed are attached to the ground with a wire made of of stainless steel covered with soil. You can make longitudinal cuts on them and sprinkle them with a rooter to make it easier for plants to establish a root system. Young specimens of hydrangeas will be ready for transplanting next year.
Fertilizer
Hydrangea growing on a poor nutrients soil, it is necessary to feed annually with a multi-component fertilizer. In early spring, scatter the pellets near the plant and gently loosen the soil with a hoe.
Watering
Curly hydrangea requires regular watering. Creepers growing on the wall should be watered especially abundantly, especially those planted on the north or east side. Such places are subject to a shortage of precipitation.
Diseases and pests
Petiolate hydrangea, like other members of the Hortensia family, is attacked by aphids. With a small amount pests are managed by their natural enemies - ladybugs and lacewings. In case of a large invasion, apply spraying chemicals or extracts of garlic, onion or nettle.
Too much calcium in the soil can lead to leaf chlorosis, which we fight by acidifying the soil and fortifying the plant with an iron-containing preparation.
Application
Curly Hydrangea is ideal as a hedge or decorative coating walls. The shrub is grown on arbors and pergolas, suitable for planting without support on lawns and under trees. Reaches a height of up to 1 m and strongly branches.
Now gardeners have the opportunity to grow the most different plants. After all, seedlings and seeds can be bought not only in the nearest flower shops but also order online. Therefore, various exotic and simply unusual cultures are very popular. And in fact, even the hydrangea known to many can be unusual. It can be shaped like a creeper, which gives it a special charm. Such a plant is known as petiolate hydrangea, we will clarify how it is planted and what care is needed when growing this crop in middle lane Russia, or rather in the suburbs.
Petiole hydrangea is amazing plant. He does not have a trunk, it is similar in shape to a liana. Such a culture is capable of covering the entire space, as if filling it, it takes the form of various objects, enveloping them. Therefore, petiolate hydrangeas are very loved by garden designers. They are winter hardy, so they can be grown on the territory of the Moscow region. It is worth noting that in our climate, such vines grow rather slowly, and their shoots can freeze in winter. In general, such freezing does not affect the health and flowering of plants, but the growth rate of petiole hydrangeas in the Moscow region remains rather slow.
Planting petiole hydrangea in the Moscow region
For successful cultivation petiole hydrangea, readers of "Popular about Health" need to choose the right place for such a plant. It is best to plant it in an area protected from the wind. Such creepers feel good in places shaded from the direct rays of the midday sun. It is best to grow them in partial shade.
Such a liana is quite demanding on quality characteristics soil and its drainage. She feels great on acidic, light, humus-rich soil. You can grow it on loams or brown soils. It is also possible to grow on red soil and alluvial soil. Petiole hydrangea does not grow well on poor sandy soil, and languishes on calcareous soil.
Planting a flower in the suburbs open ground spend in spring time after the threat has passed return frosts. Usually two-three-year-old seedlings are transferred to the garden. They must be planted at intervals of one meter. Optimal size landing pit- forty centimeters in diameter, and fifty centimeters deep.
To plant such a plant, it is worth preparing a soil mixture of two parts of humus, the same amount of fertile land, one part of peat and one part of sand. At the bottom of the pit, it is worth organizing a ten-centimeter layer of drainage. After that, the prepared soil mixture should be poured out - ten to fifteen centimeters thick.
The roots of the seedling should be carefully distributed along the bottom of the hole. The root neck of the plant should be flush with the ground. After the planting, the vine needs to be well watered, usually two buckets of water are used for each plant. After that, it is necessary to mulch the trunk circle.
Features of petiole hydrangea care
Such a liana is not very capricious. True, in extreme heat, young seedlings need not only to be watered, but also to provide them with spraying three or four times a week.
Toward the end of May - the beginning of June, it is necessary to feed the plants using a solution of slurry (in a ratio of 1:10), and a complex of mineral fertilizers is also used at this stage of cultivation.
In the future, the vine needs periodic watering. During the drought period, at least twenty liters of water should be poured under each plant once a week. With moderate precipitation, such moistening is carried out once a month.
For the entire growing season, the petiole hydrangea is fed three times. For this purpose, it is worth using a complex of complete mineral fertilizers. In autumn, wood ash can be added to the soil - one hundred to two hundred grams for each square meter.
An important milestone caring for petiolate hydrangea in the Moscow region is considered correct pruning such a plant. It is performed in order to ensure a balanced growth of the pet vertically and sideways. So, to maximize the coverage of the wall area and to obtain especially large inflorescences, it is worth cutting the vine strongly in early spring, leaving only a part of the branches with two to six buds on each. After that, it is necessary to provide a directed garter of the stems and additional pruning of the shoots growing from them. Such manipulations allow you to activate the formation of lateral shoots and make the crown denser.
If the petiole hydrangea is grown as a groundcover, then it does not need such a large-scale pruning.
In spring and autumn, it is necessary to carry out sanitary pruning: remove diseased branches and shoots.
Many experienced growers note that the hydrangea we are considering especially often suffers from attacks by a variety of pests. Therefore, it will not be superfluous to carry out preventive spraying of such a plant with insecticides.
In the first years of cultivation in the Moscow region, hydrangea grows rather slowly. Therefore, in the conditions of the climate that has settled in the territory around Moscow, it is worth hiding it for the winter: spud and cover with spruce branches. Some flower growers advise covering older specimens by removing their whips from supports. But in the spring, it is necessary to raise the vine in time so that it does not gain a foothold on the ground and does not become a ground cover.
So the plant petiole hydrangea may well grow on the territory of the Moscow region and become an excellent decoration for a personal plot.
petiolate hydrangea (Hydrangea petiolaris). Quite a beautiful, woody, deciduous liana, able to climb a support to a height of 25 meters. Natural habitat: China, Carey, Japan, Sakhalin, Kuril Islands, where it can be found on the ocean coast, on mountain slopes, as well as in deciduous and coniferous forests.
Hydrangea (Hydrangea): one of the most popular plants among gardeners around the world. The genus includes about 35 species, most often it is a variety of ornamental, abundant flowering shrubs, but there are also small trees.
petiolate hydrangea one of the few species of the whole genus, these plants are a woody liana, also called "climbing hydrangea". Other types of woody vines, genus hydrangeas are not found in our country, as they are more thermophilic.
Hydrangea petiolate decoration of the walls of the building.
In gardening and park management, it is used in vertical gardening, for decorating walls, fences, arbors, poles, old trees. It can also do without support, be used as a ground cover plant, to strengthen and decorate the slopes and banks of reservoirs. It is well enough fixed on the soil, with the help of adventitious roots.
Type description.
Shoots - red-brown, naked, covered with suckers and aerial roots, with the help of which the vine is attached to a support (trees, stones, or garden pergolas).
The leaves are shiny, smooth, dark green, with a finely serrated edge, broadly ovate or broadly elliptical, up to 10 cm long, pointed at the apex or elongated-pointed. The base is rounded or heart-shaped, the petioles are up to 8 cm long. C reverse side leaves have warts at the corners of the main veins. In autumn, the leaf turns intense yellow, the leaf fall begins at the end of October.
Hydrangea petiolate - leaf.
Hydrangea petiolate - a plant in autumn.
Petiole hydrangea - insect pollinated plant - honey plant. Blooms in the first half of summer (June - July). Flowers - not large, fragrant, pale pink or white in corymbose rather loose inflorescences up to 25 cm in diameter. Fruiting flowers are small, have rapidly falling petals, fused at the top, barren flowers are larger, about 3 cm in diameter, but few. The fruits are small, inconspicuous, ripening - September October.
Hydrangea petiolate - inflorescence.
A fairly winter-hardy plant, it can withstand the climate of middle and even northern regions without significant damage. In severe winters, the tips of the shoots can freeze slightly in young plants, so they need light shelter for the winter.
Young seedlings grow slowly during the first 2-3 years, only after a while and gaining strength do they become powerful plants capable of covering large areas on walls, gazebos and various garden supports.
Petiolate hydrangea.
Most original variety petiolate hydrangea.
Hydrangea petiolate "MIRANDA" ( Hydrangea petiolaris "MIRANDA").
One of the new varieties of petiolate hydrangea, with the advent of which it began to enjoy great popularity, differs from the main form in more decorative foliage with an uneven yellow-cream or yellow-green border along the edge of the leaf. It blooms less than species hydrangea, flowering is white in the second half of summer. Climbing along the support, it reaches a height of 8 - 10 m, the annual growth is about 0.5 m.
Hydrangea petiolaris "MIRANDA" (Hydrangea petiolaris "MIRANDA").
Petiole hydrangea "MIRANDA" feels best in light partial shade, on fertile soil. In the sun, young leaves of this vine can burn. In dense shade, the plant develops normally, but with smaller leaves and no flowering.
As well as the main species, it can be used in ground cover form, and in vertical gardening.
Landing and care.
Soil: this liana is demanding on soil fertility and drainage, grows well on acidic, light, humus-rich soils, feels good on loamy soils, on brown soils with the necessary lime content, on red earth and alluvial soils. It does not tolerate poor sandy soils well, but it does not withstand calcareous soils.
Petiole hydrangea - fence.
Landing: planted hydrangea in the ground on permanent place, in early spring or autumn, 2-3 year old seedlings, with a distance between plants of 1 meter. The size of the planting hole (40x40x50 cm), but depending on the soil should vary: on light cultivated soils, the dimensions may be smaller, but heavy clay soil require large sizes.
For planting hydrangeas, it is better to use soil mix: humus, fertile land, peat, sand (2:2:1:1). Since the plant is demanding on drainage, the bottom of the pit is lined with gravel or broken brick with a layer of 10 cm. Prepared soil mixture 10-15 cm thick is poured on top.
The roots of the seedling are straightened at the bottom of the pit, the root collar is placed at the level of the soil, after planting it is watered abundantly (about 20 liters of water for each plant). Trunk circles mulch, after digging the mulch is added. In dry times, in addition to watering, seedlings require spraying 3-4 times a week. At the end of May, at the beginning of June, plants are fed with a solution of slurry in a ratio of 1:10 and a full range of mineral fertilizers.
Petiole hydrangea - hedge,
Petiole hydrangea care at further cultivation is mainly to provide the plant with moisture and rich nutrition. These creepers are moisture-loving, in dry times they require at least 20 liters of water for each plant once a week, when precipitation occurs, once a month is enough.
It responds well to all top dressings that are required 3 - 4 times during the growing season (full mineral fertilizers- nitrophos, amonitrophos, superphosphate, garden mixture, etc.)
In autumn, wood ash is added to the soil at the rate of 100-200 g per 1 m 2. Given the tendency of hydrangea to soil fertility, you should avoid making a large number nitrogen fertilizers.
For the artificial transformation of hydrangea flowers from white to blue, there are two ways: 1 - aluminum sulfate is poured around the roots; 2 - irrigate with a special bluing agent (commercially available in gardening stores).
Artificially transformed, hydrangea flower from white to blue.
Reproduction.
Petiole hydrangea can be propagated by seeds, which are sown in autumn in boxes and lightly covered with earth. But, as with all woody vines, this plant is more acceptable vegetative way reproduction: - by rooting green and lignified cuttings, and at home, without much difficulty, it can be propagated by layering and offspring.
Hydrangea petiolate - pruning.
Pruning is done to ensure balanced vertical and side growth for plants used in vertical gardening. This is usually achieved by heavy pruning. In order to provide maximum support coverage (walls, fences, arbors or arches), pruning of powerful growths is necessary.
Hydrangea petiolate - young, fast-growing shoots.
In order to close the wall area as much as possible and get larger inflorescences, the vine is heavily cut in early spring, leaving part of the branches with only 2-6 buds. At the same time, it is required, by directing to tie up the stems and cut off the shoots growing from them, this stimulates the formation of side shoots, which in turn makes the crown thicker. Also, during the growing season, sanitary pruning is required (removal of dry and diseased branches and shoots).
When using this vine as a groundcover, no pruning is usually done, except for sanitary pruning.
Basically, that's all I wanted to say. To you about this beautiful interesting plant. Liked the article, leave your comments.
Hydrangea petiolate in nature.
Hydrangea petiole is very rare plant, and in our latitudes it can be found quite rarely. This is not a bush or a flower, the hydrangea is a vine that extends up to twenty-five meters. Basically, it grows upwards, wrapping itself around everything that it finds around itself, be it a tree or a building.
The foliage of the petiolate hydrangea is very bright and quite beautiful, but the flowers have a very pleasant aroma, so braiding a gazebo with such a plant or the facade of a house will be just great.
Like most plants, this species hydrangeas were brought to us from another continent, namely from Asia. In its natural state, it wraps around spruces and firs, because it grows mainly in forest areas.
This type of plant is unique in its own way, it has additional roots, which are also called aerial. The hydrangea feeds both by the ordinary root system, and with the help of these air horses. In appearance, the plant has its own characteristics. The leaves are ovoid, about ten centimeters wide. As for the petioles, they are quite long, their length is about eight centimeters, in addition, they still have small hairs. The leaf on the outside is darker in color than on the back.
Like others deciduous plants, with the advent of autumn, the foliage changes its color and turns yellow. When things move towards cold and winter, it completely falls off. As for the inflorescences, they are large and lush in hydrangeas. Most often, their dimensions approach twenty centimeters. The type of inflorescences is corymbose. The middle of the inflorescence consists of small flowers, and the edges are white buds, much larger than the flowers in the middle. On average, the diameter of such a bud can be three centimeters. In addition to white, there are also white and pink versions of the plant.
When the petiolate hydrangea is in a state of flowering, it comes from a very strong aroma, which is more pleasant for both humans and insects, because near them you can often meet different kind insects.
Growing conditions
In order to plant a petiole hydrangea in your garden or in your country house, you need to know a number important points, without which this plant may not give the flowering that is expected from it, or even die altogether. This type does not have clear requirements for its content, but certain details that you must know do exist:
- The soil in which you plant hydrangea should be moderately moist, have good drainage. It is extremely important to ensure that moisture does not accumulate systematically under the plant. Soil acidity is not significant for this species. If you want to please the petiole hydrangea, then add peat to the soil, it is useful for its easy and active growth. If you have a plot with calcareous soil, then it is not advised to plant this plant here, either change the place, or prepare a special hole and pour soil good for hydrangea there.
- As for lighting, it is important to know that petiole hydrangea will not grow in the shade and partial shade, it will not give active flowering and large sizes. To get a powerful green vine, you need to plant a plant only in an open area.
- As for frost resistance, this type of hydrangea can normally tolerate the winter conditions of our climate, while not freezing or freezing out at all.
As for the methods of using petiole hydrangea, in addition to growing up and braiding all kinds of vertical objects, you can put this plant on the ground. So we get a big green carpet, which will be strewn with beautiful and fragrant flowers. You can also use this type of green space for Alpine slide, where the plant will be able to braid all the stones, creating unsurpassed flower arrangements.
In the event that you want to decorate or plant a fence, a gazebo, or even your own house, then you can put the hydrangea up the supports. So your object will soon be covered with dense greenery and beautiful flowers with amazing scent. It is interesting to mention that for this plant you should not prepare special auxiliary paths along which it will climb up, if you use a grid for this, then instead of more rapid growth, the picture will be completely reversed. Do not forget that the plant will need to be cut from time to time so that it grows and develops correctly, otherwise the beauty of your green corner may not be so bright and accurate.
Features of planting a plant
In order to get a plant such as petiolate hydrangea on your site, you need to buy its seeds, or purchase a process.
If you decide to try to grow hydrangea from seeds, then it is important to know that the soil for this needs to be selected special, fertile for this particular plant. The process of laying seeds occurs in autumn, and sprouts appear already in early spring. As soon as the weather returns to normal, you can plant the petiole hydrangea in open ground.
But despite the simplicity of growing with the help of seeds, most often they use the vegetative method. In order to do everything right, you need to take green cutting and cut it so that it has one internode. Such a cutting should be at least eight centimeters long. When hydrangeas take root. It needs to be watered several times a day. In addition, caring for green space involves being in a place where direct sunlight will not reach it. It is best to plant petiole hydrangea in the ground in spring, around April or May.
It is important to know that there are certain conditions when seedlings can be planted. If you grow them for several months, then this is not enough, it is necessary to withstand the seedling for several years, and only after that plant it in an open space. If you have several seedlings, then it is not recommended to plant them closer than a meter apart.
The landing process itself is no less responsible, for this you need:
- The first step is to prepare a hole in which you will plant the plant. Its most optimal dimensions should be approximately forty by forty centimeters, and the depth is about half a meter. If the soil in which you plant the hydrangea is not too suitable for it, then it is better to make the hole larger. In the case of the most comfortable conditions for the growth of this species, then the hole can be dug and much smaller.
- The next stage is the drainage layer, it is necessary for the hydrangea to grow well and actively. When the pit is ready, it is placed at the bottom broken brick or gravel. This layer should be at least ten centimeters. It is necessary to pour on the drainage fertile soil, the height of this layer will be approximately fifteen centimeters. If you do not do all of the above actions, then the root system will begin to rot over time.
- Direct planting. We put the horses in the pit and straighten them well. When everything is ready, then the soil is filled up. The location of the root collar coincides with the soil surface.
- When you have finished planting the hydrangea, you need to water it well. Under one bush takes twenty liters of water.
- The topsoil is recommended to be mulched with sawdust, plants and the like. This will help retain water in the soil and repel pests. Thanks to this system, weeds do not grow near mulched plants, thereby not taking away moisture from them.
- The last thing you should choose very carefully is the planting site of the plant itself. If it is chosen incorrectly, then you will not get the expected result, no matter how well you take care of this crop. Without enough sun, there can be no decent result.
Features of care
Caring for a plant such as petiole hydrangea is not the most difficult, but you need to know the main points that will allow you to grow a strong and beautiful plant. The first thing that is most important for any plant is watering. In hot weather, you need to spray hydrangea leaves. This procedure is done only three times a week. As for the watering itself, it is done only once a whole week, but you need to pour as many as twenty liters of water under the bush. Watering should be carried out with a sprayer or watering can so that the soil around the plant remains moist and water gets to all areas where hydrangea roots may be.
The next stage, no less important, is the application of fertilizers. This procedure is performed several times. Late spring or early summer garden culture fertilize with slurry, in a ratio of one to ten. In addition, mineral fertilizers are also added. During the growing season, the hydrangea should be fed three to four times. Superphosphate and nitrophoska are also perfect for this plant. In autumn, the soil should be fertilized with wood ash. You can calculate the amount so that one hundred grams of ash is needed per square meter.
Plant pests and diseases
In the event that your petiole hydrangea has unusual external signs, this may indicate the presence of a disease in the plant. If the leaves become lighter, you may be seeing chlorosis. If you use humus often or abundantly, you cannot avoid such a problem. In addition, in the soil where the hydrangea grows, there may not be enough lime, which also causes similar changes in the color of the leaves.
This plant may have powdery mildew and gray rot. In order to prevent this, you need to be careful when adding nitrogen fertilizers, it is important not to exceed allowable rate. Excessive watering can also cause such ailments. If, nevertheless, your hydrangea has received such a disease, you can treat it with Bordeaux liquid.
In addition to diseases, petiolate hydrangea is also affected by insects. Its most active pests are considered spider mite, thrips and aphids. In order to get rid of them, use insecticides. During the flowering season, you need to process the horticultural crop twice so that there are no problems with pests. The interval of such spraying should be one week. If everything is done on time and according to the rules, then the petiole hydrangea will grow quickly enough, and will give you bright and juicy greenery, and very beautiful flowers.