How to propagate oleander by cuttings

Time for cuttings

Cuttings can be taken in both spring and summer.

Selection of seedbed

Try to choose land that is sheltered from the wind, facing the sun, without water accumulation, free from pests and diseases, free from weeds, with sufficient fertility and easy to manage as the seedbed. When the soil is heavy, you can add appropriate amount of sand and pay attention to disinfection.

Selection of cuttings

On the same plant, it is generally recommended to choose branches from the upper and middle parts of the current year that face the sun and have thick branches and leaves. On the same branch, generally choose the middle and lower branches, the cut should be smooth, the upper end is cut into a horizontal plane, and the lower end is cut into an oblique surface. The length of the cuttings is about 15-20 cm. The cuttings must have two or three buds. The upper cut should be about 1.5 cm away from the buds, and the lower leaves should be removed.

Treatment of cuttings

Do it as soon as you collect the cuttings, cut them short and plant them in cuttings. To increase the rooting rate, you can soak it in rooting powder for 2-8 hours.

Cutting Fangfa

When cutting, pay attention to the upper and lower ends of the cuttings and do not insert them upside down. The cut of the cuttings must be tightly connected to the soil to prevent the cortex under the cut of the cuttings from being scratched. The depth of cuttings should generally be such that one or two buds are exposed above the ground. Mark and record them after cutting.

Management after cutting

temperature

The optimum temperature for rooting of cuttings is 20℃ ~ 30℃. Below 20℃, rooting of cuttings is difficult and slow; above 30℃, the upper and lower cut ends of cuttings are easily infected by pathogens and rot, and the higher the temperature, the greater the proportion of rot. When encountering low temperature after cutting

The main insulation measure is to wrap the flower pots or containers used for cuttings with film; when the temperature is too high after cuttings, the main cooling measure is to shade the cuttings, blocking 50-80% of the sunlight. At the same time, spray the cuttings 3-5 times a day. On sunny days with higher temperatures, the number of sprayings is more, and on rainy days with lower temperatures and higher temperatures, the number of sprayings is less or no spraying.

humidity

After cuttings, the relative humidity of the air must be maintained at 75-85%. The basic requirement for rooting cuttings is that before the cuttings take root, they must be fresh and tender and able to carry out photosynthesis to produce rooting substances. However, unrooted cuttings cannot absorb enough water to maintain the water balance in their bodies. Therefore, spraying must be used to reduce water evaporation of the cuttings: Under shaded conditions, spray the cuttings 3 to 5 times a day. The higher the temperature on sunny days, the more times you spray. The lower the temperature on rainy days, the less times you spray or no spraying. However, if you spray too much, the cuttings will easily be infected by pathogens and rot, because many types of pathogens exist in water.

illumination

Cutting propagation cannot be separated from sunlight, because the cuttings must continue to carry out photosynthesis to produce nutrients and rooting substances to meet their rooting needs. However, the stronger the light, the higher the temperature inside the cuttings, the more vigorous the transpiration of the cuttings, and the more water is consumed, which is not conducive to the survival of the cuttings. Therefore, after cuttings, 50-80% of the sunlight must be blocked. After the roots grow out, the shading net can be gradually removed: on sunny days, remove the shading net at 4:00 p.m. every day, and cover it before 9:00 am the next day.