What are the breeding methods of rhododendron?

Rhododendron is the familiar Yingshanhong and pomegranate, which is a kind of flower whose color is very close to blood, and it is also the city flower of Changsha. In the past, the shadow of azaleas often appeared in the mountains, but now it is common in parks, courtyards and other embellished environments. Of course, you can also plant at home, what are the breeding methods of azaleas?

1. Seed propagation

Most rhododendrons can bear fruit and collect seeds, but the double petals are not strong. General seed maturity from October to January each year, when the pericarp from green to yellow to brown, the top of the fruit split, seeds begin to scatter, at this time should be harvested at any time. The final cracking browning is collected, put in a well-ventilated place to cool, make it naturally crack, and then remove the fruit shell and other impurities, put it in a paper bag or cloth bag, and store it in a cool ventilated place.

If there is a greenhouse, the germination rate of sowing with picking is high. General sowing time from March to April, use pot sowing, because the seeds are small, wash the basin outside, dry in the sun, sterilize and disinfect the soil, and install the basin with good permeability, moist and fertile acid soil rich in organic matter. In order to produce seedlings evenly, the seeds are mixed with some fine soil, sprinkled into the basin and covered with a thin layer of fine soil, and the watering method is used to infiltrate the basin into the basin. Put the basin on the front windowsill and cover it with a layer of glass or plastic film, in order to increase the temperature in the basin.

2. Grafting propagation

Rely on to pick up: rely on the connection is more troublesome, after survival, the appearance is not very beautiful, large-scale production is not suitable. In the growing season, choose the scion and rootstock, in the appropriate part, smooth jointless place, each cut one knife, cutting face length 3-4cm, deep to the xylem. Align the two cambium, fasten the wound with a plastic bag, heal the wound for 4-5 months, cut off the scion from the mother, cut off above the interface of the rootstock, and turn it into a separate plant. The method is sure of survival and will soon become a tree with quick results. If it is not alive, it will not lose much to the plant.

Split grafting of twigs: the splitting method is mostly carried out from May to June, with exuberant plant growth, many scion resources, moderate old and tender, rapid healing, and the survival rate is as high as 90%. Rootstock selection, cuckoo cutting for 2 years, terminal bifurcation, scion with high ornamental value, disease-free and pest-free 3cm long scion, with 3-4 fine leaves on the top, all the lower leaves removed, cut into a wedge-shaped length of 0.5-lcm, cut off at the base of the new shoot of the rootstock at 2-3cm, and cut a knife in the center, which is a little longer than the cutting surface of the scion. Insert the scion to match the cambium on one or both sides. Tie it tightly with a plastic bag, cover the scion and the interface with a plastic bag, and tie a transparent bag at the bottom of the interface to prevent rain and keep the temperature. Usually keep the temperature in the bag, prevent direct sunlight, give some fat and water, cut off the sprouts of the rootstock in time, and remove the bag after 2 months.

Ventral grafting of twigs: from mid-May to late May, rhododendron was still taken as rootstock and oblique cut to xylem at the base of 6-7cm. The length of scion was 0.5-1cm, but the front was long and short, the long side was inserted inside, the short one was facing outward, the cover was well cut, the cambium was aligned, bagged and placed in dry shade.

3. Cuttage propagation

Cutting is the most commonly used propagation method of rhododendron, except for a few that can not take root, cutting can survive, easy to collect, easy to operate, and can retain the excellent characteristics of the variety. It can be cut for one year, and the best time is from May to June, followed by August to September. However, due to different varieties and different times, western cuckoo from late May to early June, rhododendron in early June, eastern cuckoo and summer cuckoo from mid-June to late June.

Selection of cuttings: cuttings can be selected for robust growth, free from diseases and insect pests, new shoots, semi-mature branches, and lignified shoots that grow in the same year, and the terminal branches outside the crown are the best. in principle, the mother plant has 3 new shoots, one as cuttings and two as cuttings with lengths of 5-7cm, 6-8cm and 8-10cm, respectively, and the over-long branches can cut off the top shoots and remove the lower leaves. Leave 4-5 leaflets at the upper end and insert them as you pick.

Pot insertion method: wash and disinfect the basin, load the basin soil, fill the bottom with coarse-grained soil 1 beat 3, install 2 beat 3 fine soil, drill holes, insert the cuttings into 1 inch 2-1 stroke 3, spacing 3cm, and water the cuttings with a fine hole spray pot.

Ground insertion method: brick around 15-20cm high, 80-l00cm wide, filled with coarse-grained soil, fine soil, the method of inserting in the same basin.