Technical requirements for cultivation of oleander

1. Choose warm and humid climate for land preparation, sunny, well-drained, sandy loam.

two。 The propagation method of oleander is simple, and the survival rate is very high. Cuttings, striping and water cutting are usually used.

The main results are as follows: (1) the method of cutting can be either hard or soft. Hardwood cutting is carried out in early spring combined with seedling pruning, cutting branch length 15-20cm, every 20 bundled together, immersed in 20 ℃ of water, 1 ℃ immersed in water seeds, often change water, about 8 days into part of the branches whiten, when the top is stained, take out and insert into the seedbed. Or soak the branches in water for 30-40 days, take root and insert them into the sand bed for shade, making it easy to survive. In addition, the cuttings were immersed in 0.1% potassium permanganate solution, or treated with indolebutyric acid at the concentration of 0.001% Mill 0.002% for 24 hours, then inserted into the sand seedling bed and given a certain temperature. 16-18 ℃, rooting in 20 days. The tender wood cuttings are better in the rainy season of late spring and early summer, and the tender cuttings can be planted in either water or sand, or first water and then sand, pay attention to shading, often change water, keep moist, water temperature above 18 ℃, rooting in half a month. One month later, it was transferred to the seedling bed to continue culture, and flowered after 2 years.

(2) the striping propagation method can be divided into high pressure and low pressure, which can be carried out from March to April. It can take root after 30-40 days. Ground pressure is mostly carried out in rainy summer, the branches close to the ground on the mother plant are cut in a ring and buried in the soil, and the twigs are pressed for 3-4 days before they can be watered and kept moist. If you encounter the rainy season, it can take root 7 days after pressing, cut off half of it after rooting, cut it all off in autumn, and plant it in autumn or spring.

(3) seed propagation takes place at the end of spring and germinates quickly at the temperature of 18-21 ℃. If mass propagation is not needed, it is better to propagate separately.

(4) transplanting can be planted in spring or autumn, and soil balls are needed for transplanting in autumn and winter. Ramet propagation is better for mass propagation. Transplanting site, before planting, apply more fertilizer such as pig manure, beans and so on, because oleander has strong fertility absorption, transplanting plant row spacing lcm-l00cm plant, the first time after transplanting water, if summer transplanting in addition to soil ball, but also appropriate pruning branches and leaves, in order to reduce foliar sprouting, appropriate pruning tree branches and all leaves (transplanting with soil, and seedlings without soil are cut).

3. Field management

① ploughing, weeding, planting and seedling bed pulled out as soon as the grass was seen.

② topdressing oleander has a strong preference for fertilizer, watering dilute liquid fertilizer (pig manure, bean cake, black alum) once every 10-15 days.

③ watering more in summer and less in winter.

④ is planted in winter and leaves in spring. The cold tolerance of safflower oleander is weak, and rice straw is needed to cover it in seedling stage.

Before ⑤ pruning the buds of dry spring, the branches were pruned properly to make them sprout evenly, and the branches were divided according to the rule of one branch with three branches and nine beards, so as to expand the upper crown and make the tree shape full and dense. For the rejuvenation and renewal of senescent plants, the intensity pruning method of short grounding should be used to promote the germination of new branches.

4. Pest control is very few, aphids sometimes harm, can be sprayed 1000 times 40% dimethoate emulsion aqueous solution to control.