1. Seed selection: the seedlings cultivated with small seeds will also be very small, and the growth will be relatively weak, so it is necessary to select large seeds, so the seedlings cultivated will also be relatively strong, and the later growth will be guaranteed. In these seeds, there will be some shriveled ones. Pick them out. The simple way is to pour them directly into the water, soak them for about ten minutes, and throw away the ones floating on them.
2. Germination: soak the selected seeds in normal temperature water for about two to three days, and change the water once a day. Take out the seeds and put them on the plastic paper. Use a small watering can to sprinkle water once a day in the morning or evening to keep the seeds moist. After a week, the buds will come out.
3. Sowing: the selected substrate must be deep and permeable, preferably sand or loess. Dig out the ditch and put the seeds in it horizontally.
The subtropical zone is from the first ten days to the last ten days of March, and the temperate zone is from the last ten days of March to the middle of April.
