Hydrangea cultivation and management techniques
First, characteristics and varieties. Hydrangea is a deciduous shrub of the Saxifragaceae family. Its leaves are large and opposite, light green, shiny, oval or obovate, and the edges are bluntly serrated. Its flower bulbs are huge and topped, corymbose inflorescences, globose, with stalks. Each flower cluster can be opened for two months. The center is a pregnant bisexual flower that is flat; the outer edge is infertile, and each flower has four expanded sepals that are petal-like. Hydrangea native to China's Yangtze River Valley, is now cultivated throughout the country. Common varieties of cultivated varieties are the big-halloween flower, cone-shaped hydrangea, purple-half-halloween hydrangea, tooth-globe hydrangea, blue-rimmed hydrangea, silver-rimmed hydrangea, and creeping hydrangea.
Second, cultivation and management. Hydrangea is warm and humid in the semi-shade environment. It is not tolerant to drought, cold, hi-manure, and requires more water, but it is not suitable for blisters. It is suitable for growth in well-drained acidic soils. The pH of the soil has a significant effect on the color of the hydrangea. When the soil is acidic, the flower is blue. When it is alkaline, the flower is red, but it is better to cultivate it in the acidic soil.
1. Breeding: Hydrangea is easy to survive and can be propagated using cuttings or ramets. Cuttings should be carried out in spring and summer. Cuttings with 1 year old branches should be cut into 10-15 cm long sections for cuttings, inserted in a sand bed, rooted for about 20 days, and transplanted in pots for cultivation.
The propagation of tributaries should be carried out before germination in early spring. It can be divided into several plants according to the root vigor of the mother plant, cut off clever roots and long roots, transplanted in pre-prepared pots for cultivation management, and pruning at the same time.
2, fertilization and watering: Hydrangea like fertilizer, generally during the growth period every 15 days need to apply a cooked thin pancake fertilizer water, application of cake fertilizer should avoid volts, so as not to incur pests and damage to the root system. In order to keep the potted soil acidic, 100 grams of ferrous sulfate can be added to every 50 kilograms of liquid manure to be watered. At the same time, water is often poured to make the plants green and green. In the bud stage, 1-2 times of phosphoric acid is added. Hydrogen potassium solution can make flowers bright and colorful.
Hydrangea leaf hypertrophy, lush foliage, the need for more water, in the growth and development of the spring, summer and autumn, to fill enough water, so that the basin soil is often kept moist. Especially in summer, due to the large amount of evaporation, in addition to pouring enough water, spray water once a day or every other day. Hydrangea is a fleshy root, and it is easy to rot with too much water. Therefore, watering should not be excessive, and water should be drained from the basin in time after the rain. After September, when the weather is getting cooler, it is necessary to gradually reduce the amount of watering, so that the branches grow robustly to facilitate winter dormancy.
Before the frost falls into the room, the room temperature is maintained at about 5 °C, promoting its dormancy. Before winter, remove the leaves to avoid rotten leaves. From mid-December, one after another, moved to the sunny place and came out after the rain in the following year.
3, turn basin change soil: potted hydrangea, generally change the pot every year to change soil 1 times. It is advisable to change the pots and soils in the spring. The soil used for cultivating leaves, garden soil and sandy soil was prepared according to the ratio of 4:4:2, and a suitable amount of cooked cake was added as base fertilizer. When changing pots, the roots of the plants should be trimmed and rot roots, rot roots, and long roots must be cut. After planting the new pots, the soil should be compacted first, then irrigated with water, placed in a shaded place for about 10 days, and then be displaced outside for normal management.
4. Pruning and Shaping: To make the potted hydnum with a beautiful canopy, plant shape, and more flowering, it is necessary to trim the plants. Since the hydrangea flower head is too large, it should also be set in a timely manner, so as to keep the flower stand upright, but also make the plant appear full.
Hydrangea grows vigorously and is resistant to pruning. Generally, after cutting seedlings become alive, when the new shoots grow to 10-15 cm in height, they can be picked up and processed to promote axillary buds in the lower part; when the new branches grow to 8-10 cm in length, We perform the second picking up. Hydrangea generally blooms on a two-year-old strong branch. After flowering, the old branch should be cut short, and 2-3 shoots should be kept to limit the growth of the plant and promote new shoots to facilitate flowering in the coming year. After the fall, cut the top of the new shoot so that the shoots will not grow. In the early spring of the following March each year, pests and branches and weak branches should be cut from the base, leaving only the strong branches, and short cuts (two to three buds per branch) should be made for strong branches to promote new shoots and flowering.
After the above-mentioned pruning and shaping, the tree is compact, plump and well-balanced, with many flowers, large flowers, and bright colors. If it is not pruned, the base of the old branch of more than three years has been lignified, it is difficult to germinate new branches, and it is easy to form emptiness in the lower part of the plant, which affects the ornamental value.
A seedbed or seedling bed is the local soil environment in which seeds are planted. Often it comprises not only the soil but also a specially prepared cold frame, hotbed or raised bed used to grow the seedlings in a controlled environment into larger young plants before transplanting them into a garden or field. A seedling bed is used to increase the number of seeds that germinate.
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