Propagation method of red hydrangea 1
Hydrangea is propagated by dividing plants, layering and cutting in production.
It should be carried out before germination in early spring. When dividing plants, first pour the mother plant out of the basin, shake off most of the old culture soil, expose the extension direction of the roots of new buds and sprouting tillers, decompose the twisted roots to minimize root damage, and cut the joint between tillering seedlings and mother plants with a sharp knife and plant them separately. 1.2 layered propagation
It can be done all year round. Select strong and semi-lignified branches, cut the lower phloem near the node with a knife, wrap the cut part with wet moss, peat soil or culture soil, then wrap it with plastic film and tie it up and down. If the temperature is suitable, it can take root in about 1 month. Cut below the layering position, remove the plastic film and put it on the pot. Cutting propagation of 1.3
Cutting propagation can be carried out in greenhouse all year round. It is usually carried out in May-June, combined with early spring pruning and post-flowering plastic surgery. Selecting tender branches, lignified branches or semi-lignified branches without plant diseases and insect pests, with the length of 10 ~ 15 cm, keeping the top 2 ~ 3 leaves, cutting off1/2 respectively, and quickly dipping ABT rooting powder into 250mg/L talcum powder slurry.
2. Cultivation management?
Preparing hydrangeas likes loose, fertile and well-drained soil. Vinegar chaff (mainly composed of chaff), cow dung, peat and garden soil can be evenly mixed in equal amounts, and then placed until they are completely cooked before use. ?
After transplanting, it is necessary to shade properly and spray water on the leaves to facilitate seedling delay. When new leaves grow, we should remove the dense branches and overlapping branches in time, leaving 3 ~ 5 branches to obtain good plant shape. ?
The optimum growth temperature is 15 ~ 27℃. In the north of the Yangtze River, you have to move into a greenhouse above 5℃ in winter. In hot summer, measures such as shading, strengthening ventilation and spraying water on leaves are taken to cool down. ?
Hydrangea likes semi-cloudy environment. If the light is too strong, it is easy to cause the leaves to turn green and white, and in severe cases, it is easy to cause the leaves to burn and scorch. Under moderate light, the plants grow healthily and the leaves are dark green. In hot summer, 75% sunshade net is used for shading, and the light is adjusted through its ups and downs. Pull the sunshade net on sunny morning 10, and open the sunshade net at 4 pm; Remove all sunshade nets in rainy days. The sunshade net should be gradually removed to avoid excessive light burning plant leaves. 2.5 watering
It is not advisable to water too much, and it is advisable to keep the soil moist frequently. When it is dry and hot in summer, water can be sprayed on the leaves to reduce the water transpiration rate. Watering in winter? See dry and wet? For the principle, control watering during dormancy and keep it semi-dry. The water demand increases obviously before and after germination, and it should be watered 1 ~ 2 times a day. 2.6 Fertilization
In the growing period, decomposed alum fertilizer water 1 times (water 400-500 L, bean cake10-20-30 kg, pig manure 20-30 kg, ferrous sulfate 5-6 kg) is applied every 15 days, and leaves are exposed every 15 days. During flower bud differentiation, phosphorus and potassium fertilizer should be added appropriately. Dormancy period, fertilization stops.
Cultivation methods and matters needing attention of soil hydrangea 1
The soil for planting hydrangea is loose, fertile and well-drained sandy loam. However, the color is affected by soil pH, and the flowers in acidic soil are blue and those in alkaline soil are red.
water
The pot soil for planting hydrangeas should be kept moist, but it should not be watered too much, especially in rainy season, to prevent root rot caused by waterlogging. Indoor potted plants should be slightly dry in winter. If it is too wet, leaves rot easily.
3. Lighting equipment
Hydrangea is a short-day plant, so it should be cultivated away from the hot sun, and 60% ~ 70% shading is the best. When the light is too strong in midsummer, proper shading can prolong the flowering period.
4. Temperature
The suitable growth temperature of hydrangea is 18 ~ 28℃, and the winter temperature is not lower than 5℃. It takes 6 ~ 8 weeks for flower buds to differentiate at 5 ~ 7℃. The temperature of 20℃ can promote flowering, and maintaining 16℃ after flowering can prolong flowering. Note that high temperature will make flowers wither quickly.
5, fertilization
The flowering period of hydrangea is from June to July. There should be sufficient fertilizer and water in flowering period, and fertilization should be applied every half month 1 time.
prune
After the hydrangea blooms, attention should be paid to stem removal to promote the emergence of new branches, and proper pruning can keep the plant beautiful.
7. Pests
Hydrangea mainly includes Fusarium wilt, powdery mildew and leaf spot. Spraying 65% zineb wettable powder 600 times solution for control. Pests do great harm to aphids and blind stinkbug, and 40% omethoate EC 1500 times can be sprayed.
The propagation methods of hydrangea are often cutting, dividing plants, layering and grafting, with cutting as the main method. In the rainy season, you can choose strong shoots from young mother trees as cuttings. The base of cuttings should be knotted and dipped in mud, about 20 cm long, and the lower leaves should be removed. The optimum cutting temperature is 65438 0.3 ~ 65438 0.8℃. You need shade after cutting and keep it moist all the time. Rooting takes about 1 day, and it can be transplanted in the second year after survival.
The ramet propagation should be carried out before germination in early spring. Separate the rooted branches from the mother plant, pot them directly, water them too much, and maintain them in semi-shade, and then transfer them to normal maintenance after sprouting new buds. When the bud germinates, it can be propagated by layering and grow after 30 days. The next spring, it can be cut from the mother plant, transplanted with soil, and can bloom in the same year.
Generally, high pressure is applied in March-April in spring, and it can take root in June-July, and it can be planted by cutting in the same year. Grafting propagation takes Qionghua seedlings as rootstocks, and it is easy to survive by cutting in spring. Transplanting should be done after defoliation or before germination, and overnight. The main branches are easy to germinate and grow long branches, which need to be trimmed properly after flowering to shape the tree.
Hydrangea doesn't like sunshine, but is tolerant to shade. It can be planted in potted plants and arranged in halls and study rooms for indoor viewing.
Cultivation methods related to hydrangea:
1. How to raise hydrangeas?
2. How to raise hydrangea?
3. How to raise hydrangeas
4. Hydrangea cultivation methods and matters needing attention
5. How to raise potted hydrangeas?