Reasons for low germination rate of seedless watermelon

The reason for the low germination rate of seedless watermelon. First, the seed embryo is underdeveloped, which is only 1/2 of the total seed weight, and the proportion of seed embryo malformation is high. Second, the seed coat of triploid watermelon seed is thick, and it is difficult for the seed coat to sprout at the top of the immature embryo. Third, the seed cavity of seedless watermelon is large, and fourth, the germination rate of seedless watermelon is difficult to improve because of its high temperature and difficulty in accurate regulation.