Seed soaking of watermelon seeds

It is usually best to soak the seeds in cold water at room temperature (about 20 ℃) for 24 hours, which can germinate early and evenly. In addition, there are the following seed soaking methods: first, soak the seeds in 55 ℃ warm water, add 2 parts of boiled water and 1 part of cold water, which can be adjusted to 55 ℃ warm water, and then soak the seeds for 4 to 6 hours after natural cooling. Second, soak the seeds at constant temperature, soak the seeds in 25 to 30 ℃ of warm water for 6 to 8 hours.