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Arboreal hibiscus is a deciduous shrub that blooms throughout the summer. In a natural environment it can reach a height of 6 m, but in a temperate strip it grows up to 2.5 m.
A wide palette of shades and unpretentious care makes it very popular among flower growers. Read further what types of this plant are and which ones are suitable for the formation of bonsai, their photos. What conditions are needed for their comfortable growth in the garden. How does this plant multiply, as well as what diseases and pests can destroy the culture.
What species are treelike?
Treelike hibiscus is characterized by its ability to form a solid trunk. The most popular varieties for outdoor cultivation are lavender chiffon and Duc de Brabant. Both are a variety of the Syrian hibiscus that thrives outdoors and can easily endure winter with proper care. About what other types and varieties of hibiscus there are, we talked here.
Here you can see a photo of a tree-like hibiscus:
Care in the garden
If you create comfortable conditions for a tree-like hibiscus, it can live up to 15 years.
Hibiscus is native to tropical countries, so it copes well with high temperatures. For flowering, its optimal value will be 20-25 0FROM, and in the cold season, garden hibiscus feels comfortable at temperatures down to -5-10 0C. Lower values can kill the plant.
Important! Sudden changes in temperature must not be allowed. To prevent this from happening, planting or transferring hibiscus to the street should be when the danger of frost is gone.
Hibiscuses can tolerate drought, but this is detrimental to flowering. The optimal watering regime will be once every 2-3 days, however, in especially arid regions in summer, this may be needed daily. In case of drought, the leaves of the plant can be moistened with a spray bottle, but you should not do this when the sun is at its zenith, otherwise the leaves may burn.
Hibiscus loves good lighting. In the shade, it can slow down growth and stop blooming. In this case, it is necessary to ensure that there are no strong winds and drafts at the place of growth of the tree.
The soil must be well-drained and fertile. When planting a tree on a site, you can add to the planting hole:
- Drainage layer 15 cm.
- Sand 10 cm.
- Compost 15 cm.
- Sand again, 15 cm.
The size of the planting hole should be 2 times the size of the root system.
Formative pruning should be done in the spring. In this case, you can cut off up to 1/3 of the length of the shoots, new ones will quickly appear in their place.
It is also worth pruning in preparation for winter. However, at this time, it is enough to simply cut the flower stalks, seed pods and shorten the shoots.
The plant must be fed with phosphorus and nitrogen fertilizers once every 10-14 days, especially during the flowering period. Starting in September, you can prepare the plant for wintering. and add potash to his diet.
If you want to plant hibiscus in a pot, you need to choose a fairly spacious container at the rate of 0.5 m2 soil for an adult plant. Good drainage is essential.
Reference. Hybrid hibiscus varieties can withstand frosts down to -30 0FROM.
However, when the winter is long, it needs to be covered. If the plant is young, it is better to transplant it into a pot and completely remove it indoors until spring.
Transplant: step by step instructions
A young plant can be transplanted as needed, and an adult tree does not need it at all. It is enough to loosen the soil and change its top layer. If a transplant is needed, it can be done in early spring:
- Trim branches to about a third or even half the length.
- Moisten the soil.
- Gently remove the root system. You can pry it off with a shovel so as not to injure the roots.
- Examine the roots, if necessary, remove dead or diseased ones.
- Plant in a new place.
It is believed that hibiscus is not suitable for growing bonsai. The main reasons: very large leaves, and fragile branches that are easy to break when working. However, it is unpretentious to maintain, affordable and grows quite quickly, which makes it popular for bonsai despite these disadvantages.
Almost any type of ornamental tree hibiscus can be suitable for bonsai, but Cooper's and dissected-petal hibiscus are especially popular.
How to care?
Hibiscus loves lit places. You can put it on the south or west window. In this case, it is important that the tree does not stand in a draft.
Hibiscus does not like stagnation of moisture at the roots, and if it is grown in bonsai form, this becomes even more important. Excessive moisture will lead to root rot and death of the plant. However, overdrying of the soil should not be allowed.
In winter, hibiscus will have a comfortable temperature around 12-14 0FROM. During the flowering period, its value should be around 20-25 0FROM.
Hibiscus can be propagated in several ways: by cuttings, dividing the bush, or by seed.
This is the most popular method as it is fairly simple and the results are consistent. The best time for him is summer.
- Take an apical or slightly green branch.
- Count at least 3-5 leaves and make an oblique cut slightly above the sheet.
- Cut off the lower leaves and peduncle on the handle.
- Root in substrate or water. If rooted in water, the container should be opaque. In the substrate, the cutting will take root faster and give stronger roots.
Important! For any type of rooting, the cutting should be covered with a small greenhouse. A plastic bag or bottle is suitable for this. The main thing is that the walls of the greenhouse do not touch the leaves of the cutting.
This method does not give such consistent results, but it is good for growing hibiscus obtained by pollination of parental hybrid plants.
- Prepare the soil: mix humus and river sand in equal parts.
- Spread the seeds over the surface and sprinkle them with a layer of soil approximately 1.5 cm thick.
- Cover with glass and water the soil as it dries.
The optimum temperature for germinating seeds is 20 0C. You can dive seedlings when the first true leaf appears.
By dividing the bush
This method is quite simple and will help to rejuvenate the existing plant. Suitable for shrubbery.
- Dig up a bush.
- Split the root system. Leave growth points on each part.
- Cover with foam and leave at 18-20 0FROM.
- After a month, you can land on a permanent place.
Briefly about diseases and pests
The most common pests of hibiscus are aphids, spider mites, whiteflies and worms. To prevent them from infecting the plant, you need to periodically wash it with warm water and humidify the air in the room. If this does happen, the plant must be treated and the damaged shoots removed.
Hibiscus may have buds or leaves turn yellow. This usually happens from improper care. Most likely, the soil in the pot is dry or insufficiently fertilized. Also, a sudden change in temperature can be the cause.
Hibiscus blooms throughout the summer. Each flower opens only for a day, but the next day a new one will appear. Treelike hibiscus is unpretentious and is able to take on various forms under the close attention of the grower. It can be a standard tree or an interesting bonsai in an apartment. The main thing is to follow the basic rules of care.