Watermelon should be soaked before germination. Soak the seeds in warm water for 4-6 hours, and keep the surrounding temperature at 25-32 ℃. If the effect of soaking is not good, the temperature can be raised appropriately, and the best temperature is 30-32 ℃. The surrounding temperature should not be too low, otherwise the effect is difficult to achieve the expected. Too high temperature is not appropriate, if more than 40 degrees Celsius, the inner and outer skin will shrink due to water loss in two hours, which will lead to the phenomenon of seed coat opening, affecting the later sowing growth.
As long as the soaking time and water temperature are enough, the temperature of germination is also suitable. It can sprout in about 2-3 days, but there is no accurate time for germination, which is not to say that it can sprout in a few days. If the surrounding conditions are not suitable, the germination time will be prolonged, which does not need to be too worried
In addition to the temperature and time of germination, we should also pay attention to the problem of humidity. If the surrounding humidity is small, the external environment is relatively dry, and the testa is very wet, it is easy to cause problems in the testa, resulting in the opening of the testa.
