Rules For Growing Large-leaved Hydrangeas. Planting And Leaving. Wintering. Photo

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Rules For Growing Large-leaved Hydrangeas. Planting And Leaving. Wintering. Photo
Rules For Growing Large-leaved Hydrangeas. Planting And Leaving. Wintering. Photo

Video: Rules For Growing Large-leaved Hydrangeas. Planting And Leaving. Wintering. Photo

Video: Rules For Growing Large-leaved Hydrangeas. Planting And Leaving. Wintering. Photo
Video: How to Plant Hydrangeas in Containers 2024, March
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Garden, or large-leaved hydrangea is a shrub that is magnificent in every sense. Despite the fact that this plant is initially not very hardy, the fashion for it has spread to our gardens as well. The magnificent caps of the inflorescences with unique shades of color, the luxurious leaves and silhouettes of this queen among the hydrangas are enchanting. And only after planting a bush or two large-leaved hydrangea in their garden, many gardeners discover all the "pitfalls". This, the most difficult to grow, hydrangea requires systemic care and attention, careful selection of conditions and, in general, is quite capricious.

Large-leaved hydrangea (Hydrangea macrophylla)
Large-leaved hydrangea (Hydrangea macrophylla)

Content:

  • Botanical features of large-leaved hydrangea
  • Criteria for choosing garden hydrangea, or large-leaved
  • Conditions required for large-leaved hydrangea
  • Planting large-leaved hydrangeas
  • Large-leaved hydrangea care
  • Wintering large-leaved hydrangea
  • Pest and disease control of large-leaved hydrangea

Botanical features of large-leaved hydrangea

Large-leaved hydrangea, or garden (Hydrangea macrophylla) is a highly decorative and fast-growing type of hydrangea native to Japan and China. The maximum height in a region with severe winters is limited to 1-2 m. This species has erect shoots, ovoid, large, bright green leaves and flat wide inflorescence shields up to 15 cm in diameter and up to 10 cm in height, consisting of fruiting lilac or blue and large pink, with irregular bright strokes, up to 3.5 cm in diameter, sterile flowers.

Hydrangea inflorescences, the flowering of which starts in July, remain highly decorative until next spring: they dry out, but still remain very attractive.

Large-leaved hydrangeas, the fashion for which came to us from the West, so captivating in tubs and pots, so unique in their beauty for their almost spherical dense inflorescences and bright foliage - shrubs are still capricious and unadapted to the harsh climate. But this does not prevent them from growing even in regions with severe winters.

And although these beauties need special care and protection for the winter, their beauty, nevertheless, is unmatched. And it doesn't matter if you decide to transplant a potted hydrangea into the garden or originally purchased a garden plant - the principles of growing and caring for the shrub will still be the same. The main difficulty in growing large-leaved hydrangeas is associated with the need to preserve last year's shoots, on which this type of hydrangea blooms, during a long and harsh winter, not only without freezing, but also without drying out.

Criteria for choosing garden hydrangea, or large-leaved

Choosing the right variety is a key success factor in growing large-leaved hydrangeas. This plant has more winter hardy and less hardy varieties that can only winter indoors. The declared frost resistance of this type of hydrangea is up to -18 ° C, characteristic only for varieties adapted to the harsh climate and mainly modern ones.

When choosing hydrangeas, you should give preference to plants not according to the degree of their decorativeness, but according to the factor of adaptability to your climate - the plants of local garden centers and nurseries. Imported large-leaved hydrangeas are more likely to cause disappointment.

Be sure to check if the variety has been tested in your area or is grown in a climate similar to yours. When choosing a variety, it is worth paying attention to one more very important factor: remontability or common cultivar.

Repaired varieties, to which the vast majority of modern macrophylls belong, are hydrangeas, which can boast not only of various colors, but also the ability to bloom both on last year's and on young shoots. Such hydrangeas are guaranteed to bloom: even if something fails or winter protection is not enough, young branches will still give at least a few inflorescences.

Hydrangea macrophylla is grown differently from other types of hydrangeas, including treelike and paniculate. If other species have much more in common than excellent in the requirements for care and selection of conditions, then the large-leaved hydrangea requires a special approach.

Large-leaved hydrangeas should only be bought in containers or pots: seedlings with an open root system do not take root well and should not even be experimented with in regions with harsh winters (injuries sustained by the root system will not allow the plant to fully adapt and build up a root system sufficient for to withstand the winter even with shelter).

Large-leaved hydrangea (Hydrangea macrophylla)
Large-leaved hydrangea (Hydrangea macrophylla)

Conditions required for large-leaved hydrangea

Despite the status of shade-tolerant shrubs, inherent in all hydrangeas without exception, macrophylls do not belong to such. Even in southern regions with mild winters, this plant can only be planted in partial shade, and not in the shade, and in regions with severe winters, plants should be classified as light-loving.

But when choosing a place for a large-leaved hydrangea, you should not rush to plant it on hot sunny areas, protecting it from midday and lunch rays. So that the large-leaved hydrangea does not suffer from heat and overheating of the roots, the plants are planted in a place where they will not be illuminated by the daytime, but by the morning or evening sun (but not less than 6 hours a day). Ordinary sunny areas will lead to the fact that in summer the leaves and inflorescences of the bush will wither and wither daily, and the latter may not recover even at night.

When choosing a place, it is worth considering the location in relation to trees and shrubs. Despite the fact that in most landscape projects hydrangeas can be seen under the trees, planting macrophylls in such a company is still not a good idea. Hydrangea is moisture-loving and under woody ones it can suffer from a lack of moisture, which will be pulled from the ground by giants.

Large-leaved hydrangea (Hydrangea macrophylla)
Large-leaved hydrangea (Hydrangea macrophylla)

Planting large-leaved hydrangeas

Macrophyll planting requires great care and careful preparation. The main attention should be paid to the preparation of the site and the soil mixture with which the planting pit will be filled.

The optimal planting dates in regions with severe winters (including in the middle lane) is spring. Planting hydrangeas is carried out as soon as the weather permits, the soil will not only thaw, but also warm up, and the threat of severe frosts will pass.

For large-leaved hydrangea, the recommended planting distance is about 1 m.

Hydrangea is not simply covered with soil taken out when digging a hole, but a special soil mixture is prepared in which the roots adapt and germinate faster. Peat, humus, coniferous soil are added to the garden soil in equal shares, preparing a loose and super nutritious soil mixture.

The garden soil removed from the hole, in turn, can be replaced with a mixture in equal proportions of sod, leafy soil and sand. But the key point is to determine the acidity of the soil, which, in turn, will provide the color of the inflorescences. If you want to grow those very blue, blue or purple hydrangeas (you can get them only from varieties with pink or red color, but not from white-flowered hydrangeas), then you need to prepare in advance such a soil that will provide the initial high acidity.

For hydrangeas with blue colors, the pH should be between 5.0 and 5.5. For hydrangeas with white, pink and red inflorescences, the permissible value is from 6.0 to 6.2 (in acidic soil, the color of non-white varieties will change to lilac or blue).

In any case, large-leaved hydrangeas should not be planted in soil with a calcareous reaction (maximum permissible pH value is 6.4). If you want to get blue or lilac colors, then you need to add aluminum sulfate to the soil. At the same time, if the soil is changed specifically to obtain blue hydrangeas, it must be remembered that such an addition is only the first step. In the future, it will be possible to save the colors only with proper watering and fertilization. In addition to the acidifying additive, a full portion of complex mineral fertilizers is also applied to the soil. Today, the addition of hydrogel has become fashionable, which allows you to more effectively retain moisture.

The size of the planting hole should correspond to the size of the root ball of a large-leaved hydrangea: about 35 cm deep and wide for small bushes in small containers and half-meter holes for larger specimens. Preparing the landing pit will also require additional tweaks. To avoid the risk of water stagnation even on ordinary clay soils, improve water and air permeability, create an optimal environment at the bottom of the planting holes, you need to lay a drainage layer (expanded clay or pebbles, but not crushed stone).

Before planting, the upper free layer of the substrate is carefully removed from the container (usually it is quite dirty), and the plant is watered abundantly for at least a few hours. When taking out a hydrangea, you need to be very careful and try not to destroy the earthen lump. In a cramped container or pot, strong young roots tend to curl around the perimeter of the earthy coma, as if entangling the substrate. They need to be straightened, straightened carefully, without injuring the small roots.

A thin layer of soil is poured at the bottom of the hole and a small mound is created. A hydrangea is placed on it, straightening long roots. Then the seedling is carefully covered with the prepared soil mixture, carefully tamping the soil and gently compacting it around the root ball. When planting, you need to ensure that the depth of the root collar does not change.

Planting large-leaved hydrangea is completed with abundant watering and mulching: the trunk circle is covered with a layer of peat or a mixture of peat and compost with a height of 7 to 10 cm.

Planting large-leaved hydrangea
Planting large-leaved hydrangea

Large-leaved hydrangea care

Humidity and watering requirements

Large-leaved hydrangeas, like any other species of this shrub, are not accidentally named hydrangeas. But if some types of hydrangeas are content only with watering in a drought, then a large-leaved beauty needs a more careful approach. For this hydrangea, the soil in the trunk circle must be kept constantly moist.

Since uniform moisture can be achieved only by systemic irrigation, the macrophylla hydrangea is watered regularly (at least once a month), teaching procedures in drought and heat (the optimal strategy is 1 watering per week). For each bush of hydrangeas, 20-25 liters of water are used, deeply soaking the soil under the plant. Hydrangeas are watered at the root, so that both the garden soil and the lump of earth that was saved during planting are saturated.

Shrubs need watering not only in spring and summer, but also in autumn. Lack of moisture while preparing for winter can cause severe damage to the plant. But excessive humidity in autumn is also very dangerous. If the weather is rainy and there is a lot of precipitation, then the large-leaved hydrangea is protected from getting wet, because it should go under the shelter with low soil moisture and a dried crown.

You can simplify the watering process by taking care of mulching: it will allow you to more effectively retain moisture and protect the root system from overheating. For mulching garden hydrangeas, materials are used that play the role of an acidifying additive - coniferous litter, coniferous soil or pine bark. Refill mulch 2-3 times per season.

The characteristics of the water for irrigating hydrangeas are of great importance. For blue and lilac hydrangeas, watering can only be carried out with soft or acidified water, the pH value of which does not exceed 5.5. But for any other hydrangeas, it is preferable to use soft or rain, warm, settled water.

For large-leaved hydrangeas, drip irrigation systems can be installed that effectively direct water to the roots and maintain a stable soil moisture.

Watering large-leaved hydrangea
Watering large-leaved hydrangea

Pruning and shaping large-leaved hydrangea

As is the case with most flowering shrubs, garden hydrangeas should not be pruned immediately and started from the first year on. In the first three years, the shrub builds up the root system, and while the rooting process lasts, you should not expect lush flowering, there is no need to carry out regular pruning procedures to stimulate it. The only thing that the bushes will need is sanitary pruning or cleaning, during which dry and damaged shoots are removed.

Only after three years do they begin to carry out regular procedures. Hydrangea inflorescences can be removed both in autumn and spring, but it is better to leave them for the winter, like the upper leaves, for optimal bud protection. Pruning on remontant and ordinary, blooming only on the shoots of the previous year, hydrangeas, is different:

  1. In ordinary varieties, pruning is carried out in early spring, after removing the shelter, combining sanitary pruning with the removal of last year's inflorescences to the first living bud on the branches (if the inflorescences were not removed in autumn).
  2. In remontant hydrangeas, pruning is carried out to the second or third bud on all shoots, stimulating the development of several lateral peduncles and increasing the number of inflorescences.

On old bushes of large-leaved hydrangea for rejuvenation, a partial cutting is carried out in the spring: 2-3 of the oldest shoots are removed (but not more than a quarter of all branches), in place of which new replacement branches will gradually grow. Radical rejuvenation will not only make you wait for a new flowering for several years, but also increase the risk of losing hydrangeas. It is better to rejuvenate the plant gradually, removing the oldest shoots in a few years.

Pruning hydrangea large-leaved
Pruning hydrangea large-leaved

Top dressing and acidification for macrophylla hydrangea

When choosing the type of fertilizer for feeding, the desired color of large-leaved hydrangeas should be taken into account. For blue and lilac hydrangeas, only fertilizers with a low phosphorus content can be used, an excess or even the usual amount of which can prevent discoloration. For intense and clean red and pink hydrangeas, on the contrary, fertilizers with a high phosphorus content are chosen.

For hydrangeas, it is better to use special fertilizers, which are in the product lines of all popular manufacturers of garden dressings. Fertilizers are also suitable for other plants that love acidic soil - rhododendrons, heathers, etc. But you can use a complex universal fertilizer, and separately nitrogen, potash and phosphorus fertilizers, mixing them yourself.

The main advantage of special fertilizers for hydrangeas is the correct ratio not only of the main elements, but of trace elements that fully meet the characteristics of the shrub.

If you mix fertilizers yourself, and do not use ready-made preparations, then for blue hydrangeas, mix 25 g of nitrogen fertilizers with 5 g of phosphorus and 30 g of potash for 1 feeding, and for pink and red ones - 10 g of nitrogen with 40 g of phosphorus and 10 g of potassium …

For large-leaved hydrangeas, three dressings are usually applied:

  1. Spring, which is introduced at the very beginning of the growth of a large-leaved hydrangea and containing all three trace elements (can be replaced with organic fertilizing or combined both fertilizing).
  2. Two summer dressings (in June for planting buds and a few weeks after the start of flowering), which can be carried out both with special fertilizers for hydrangeas, and exclusively with potassium-phosphorus fertilizers, which improve the ripening of shoots and preparation for winter.

For all hydrangeas from which they want to achieve blue, blue or purple flowering, in addition to the usual dressings, acidifying procedures are carried out by watering the plant with special fertilizers. During the entire active season, with a frequency of 1 time in 7-14 days, the plant is watered with aluminum sulfate, or rather, with an aqueous solution of aluminum sulfate in the ratio of 1 tablespoon of the drug to 1 liter of water.

Iron or aluminum alum is also used (8-10 crystals per 2 liters of water per plant). For hydrangeas that want to get a bright pink or red color, when the color changes and signs of soil over-acidification, it is better to carry out the reverse procedure in time - alkalinization, adding a handful of ash or dolomite flour to the soil.

Aluminum sulphate for acidifying the soil and coloring the flowers of large-leaved hydrangeas
Aluminum sulphate for acidifying the soil and coloring the flowers of large-leaved hydrangeas

Wintering large-leaved hydrangea

The easiest way to protect low-hardy large-leaved hydrangeas for the winter is to dig and carry them into pots and containers, keeping them either in a cool room with tubs, or on a windowsill in a room with at least 2 months of full shading.

However, constant digging and planting will not allow the plant to build up a normal root system, and the lack of a full-fledged dormant phase will still affect flowering, and the risk of infection with diseases and pests will increase. If you want to keep the macrophylla hydrangea indoors in winter, then it is better to grow it initially as an indoor or garden container plant, the care of which is somewhat different from the general rules.

For successful overwintering in the soil, any macrophylla hydrangea, without exception, needs protection and shelter; even the newest varieties with increased resistance or remontant varieties bloom more luxuriantly due to the ability to release inflorescences on young twigs. Indeed, even in the best hydrangeas, winter hardiness is limited to only 18 degrees of frost. Shelter for garden hydrangeas is often compared to sheltering roses, and they do have a lot in common.

The classic method of protecting large-leaved hydrangea for the winter involves the creation of several layers of shelter:

  • in mid-September, leaves are removed from the bottom of the bushes of large-leaved hydrangea to improve lignification, and before the first frost, leaves are removed up to half of the shoots (if it is rainy in autumn, then a frame is additionally built over the plant to protect it from waterlogging);
  • in late October or early November (if autumn is cold and the first frosts are observed earlier, then in mid-October), the hydrangea bush is spud with peat, using about 1 bucket per plant;
  • when the temperature drops greatly, spruce branches or a board are laid on the soil, the shoots of the plant are tilted and pinned;
  • the bush is covered with a dense layer of nonwovens;
  • from above the bushes are covered with dry leaves;
  • non-soaking protective materials (roofing material or film) are laid on the leaves.

Each stage of the shelter is created in a few days, completely closing the hydrangeas only with the onset of stable frosts: damping off threatens the shrub no less than freezing. The holes in the shelter are left until severe frosts, if possible, opening them up during periods of thaw.

Hilling large-leaved hydrangea for the winter
Hilling large-leaved hydrangea for the winter

There are other options for hiding a large-leaved hydrangea:

  • huddled bushes of large-leaved hydrangea are bent to the ground, covered with leaves or covered with spruce branches, and covered with boxes or wooden boxes on top;
  • after hilling, spruce branches are laid out around the bushes or wooden flooring is installed, shoots are pinned and the bushes of large-leaved hydrangea are covered with spruce branches or dry leaves, covering from above with non-woven materials; the last layer of the shelter is created from peat or sawdust covered with waterproof materials

Removal of the shelter is carried out gradually, layer by layer, with a difference of 2 to 3 days to 1 week. They begin to remove the shelter in April, and finish only after the threat of spring frosts has completely disappeared.

Pest and disease control of large-leaved hydrangea

Large-leaved hydrangeas can hardly be called the most persistent and hardy. This type of hydrangea often suffers from:

  • from chlorosis, which occurs on alkaline soil and when watering with hard water, most often manifests itself in yellowing of the leaves (you can fight by acidifying the soil);
  • from downy mildew, which manifests itself in oily yellow spots (it is better to fight with copper-containing preparations and fungicides);
  • from rust (the main method of control is spraying with copper sulfate);
  • from septoria (fungicides, burgundy and Bordeaux liquid);
  • from spider mites, which, during drought and low humidity, easily entwine all shoots (requires the use of insecticides);
  • from mice and other rodents who are attracted by a warm winter shelter (it is better to set traps in advance or spread the appropriate means).

In the first year after planting, it is advisable to water any large-leaved hydrangea with a weak solution of a fungicide of complex action to protect it from rot and diseases (you can also use a weak solution of potassium permanganate).

Large-leaved hydrangea (Hydrangea macrophylla)
Large-leaved hydrangea (Hydrangea macrophylla)

In the fall, as part of the procedures for preparing for the winter for large-leaved hydrangeas, it is better to carry out preventive spraying with a Bordeaux mixture, which will improve the preservation of the branches, reduce the risk of overheating and prevent fungal diseases.

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