Watermelon sowing date
Watermelon is a cucurbitaceae plant, native to Africa. It is millet, so it is usually planted once a year. If you plant it in a greenhouse, you can plant it twice a year.
Watermelon is generally suitable for spring sowing, and the specific sowing time is from March to the middle and late April. At this time, the climate is mild, the germination rate is relatively high, and some areas sow in June-July.
Watermelon sowing method
1. Watermelon seeds need to be disinfected in the sun before sowing, then soaked in warm water at 55℃, cleaned, germinated in an incubator at 40℃ for 6 hours, and germinated at 33℃ until the radicle grows to 0.5 cm.
2. Watermelon sowing needs to be carried out in the leeward and sunny place with dry terrain and convenient management. Before sowing, N, P and K fertilizers should be applied in proportion, and the seeds should be watered the day before sowing. When sowing, the seeds should be laid flat in the soil, covered with a thin layer of soil and covered with a thin film.
Key points of watermelon planting
When watermelon is cultivated in the open field, the ground temperature should be kept at 65438 05℃. Germination can be accelerated during cultivation, and then sowing can be carried out. Watermelon seedlings are generally not watered before they are unearthed, and watering should be controlled at the cotyledon stage of the plant.
After the real leaves of watermelon are unfolded, the watering amount can be increased, the temperature can be raised appropriately, and the film should be uncovered and ventilated to prevent high temperature and humidity. Watermelon seedlings are dry at high temperature in autumn, and attention should be paid to replenishing water.
Ripening and Harvest of Watermelon
If watermelon grows in natural environment, it usually takes 80~ 1 10 days from sowing to maturity, and the maturity of early-maturing watermelon is only 90 days. If planted in northern China, the maturity period is about 120 days, and the fruiting period is usually 7~ 10 months.
Generally speaking, the yield of large watermelon is about 7000 to 1000 kg per mu. If cultivated many times, it can be higher. Small watermelons generally yield 3000 to 5000 kilograms per mu.