1、 Sowing and propagation

1. Sowing time: avocado is usually sown in spring, when the climate is relatively warm, which is very helpful for the rooting and germination of seeds. Because it is not heat-resistant and afraid of cold, it is rarely planted in summer and winter

2. How to promote germination: wash the avocado seeds and soak them in clean water for one day and night. After taking them out the next day, wrap them with wet paper towels and put them in a sealed box. Generally, the seeds will germinate after two to three weeks

3. Sowing: prepare loose and fertile sandy loam as the seedbed, bury the avocado seeds in it, cover it with soil, pour an appropriate amount of water, and wait for it to grow seedlings

4. Seedling cultivation and maintenance: Avocado needs proper shading after planting to avoid sunlight. Drench with water every morning and evening to keep the soil moist. After germination, you can see light. Transplant when it grows to 15-30 cm

2、 Grafting propagation

1. Rootstock selection: avocado is often used as the rootstock of Mexican seedlings. Compared with West Indian and Guatemalan varieties, Mexican varieties have strong cold resistance, which is conducive to plant growth and overwintering

2. Scion selection: the scion of avocado generally uses the excellent varieties of West India or Guatemala. According to different grafting methods, there are also requirements for the age of scion. Generally, 1-year-old middle branches are selected for budding, while 3-4-year-old seedlings are used for splitting, and seedlings from half a year to one year are used for budding

3. Grafting: if it is budding, the part with axillary bud needs to be cut off, cut it into shield shape and inserted into the T-shaped incision of rootstock. If the scion is split, the bottom of the scion needs to be cut into a wedge, and the rootstock is split from the middle and inserted into it. No matter what kind of grafting method, it needs to be wrapped tightly with plastic film after grafting to avoid water entry