The reproduction method of azalea

The propagation methods of rhododendron can be divided into five methods: cutting, grafting, striping, splitting and sowing, among which cutting is the most common and the reproduction quantity is the largest. Striping is the fastest to form seedlings, and grafting is the most complex. Only varieties that are not easy to survive by cuttings are grafted, and sowing is mainly used to cultivate varieties.

Sowing method

For sowing, evergreen rhododendrons had better be sown with picking, and deciduous rhododendrons can also store their seeds for spring sowing the following year. When the temperature is 15-20 ℃ degrees, the seedlings will emerge in about 20 days.

Cutting method

The use of cutting propagation, cutting pot to 20 cm diameter of the new shallow tile basin is better, because of its good air permeability, easy to take root. The culture soil composed of 20% humus garden soil, 40% horse dung dust and 40% river sand can be used as the substrate. The best time for cutting is in spring (May) and autumn (October), when the temperature is between 20 and 25 ℃, which is the most suitable for cutting. when cutting, select the semi-lignified and sturdy branches of the same year as cuttings, press the knife with extremely tweezers; cut 6cm to 10cm with nodes, cut off the lower leaves and leave only the top 3 leaves and 4 leaflets. Buy a vitamin B12 injection, open it, dip the cuttings in the liquid, take it out and dry it for a while. Before cutting, you should spray the soil in the basin with a spray can the day before, but do not spray too much. It is mocking and moist the next day, which is most suitable for cutting. The depth of the insert is 3cm to 4cm. When inserting, first use chopsticks to save a hole in the soil, and then insert the cuttings, compacting them with their hands, so that the potted soil is in full contact with the cuttings, and then pour water once. After inserting, the flowerpot had better be covered with a plastic bag, the mouth of the bag is tied with a belt, open when it needs to be watered, and then re-fastened after pouring. The cutting flowerpot should be placed in a sunless place, and the cutting pot soil should be sprayed with water every day for 10 days. Except for rainy days, it can be sprayed once in cloudy days and twice in dry weather, but the amount of water sprayed every day should not be too much. Always pay attention to keeping the soil moist after 10 days. 4-5 weeks to shade, until the bud can gradually let it receive some sunlight. It usually takes about 2 months to take root. After that, it only needs to be shaded for 2-3 hours at noon, and the rest of the time can be allowed to receive light in order to make its own nutrients in its photosynthesis.

Grafting method

The grafting propagation of rhododendron is used more often, the twig is often split, the grafting time is not limited, the rootstock is mostly biennial rhododendron, and the survival rate is more than 90%.