Watermelon is an annual vine; Stems and branches are stout, with obvious furrows, long and dense, white or fawn villous. Tendrils are thick, with inconspicuous grooves and densely pilose; Leaf blade is papery, triangular, oval in outline, white and green, with short bristles on both sides.
Monoecious. Both male and female flowers are solitary in leaf axils. Male flowers, densely yellow-brown villous; Calyx tube bell-shaped, densely villous, calyx lobes narrowly lanceolate, nearly as long as calyx tube, stamens 3 filaments short, anthers folded, calyx and corolla the same as male flowers.
The fruit is large, nearly spherical or oval, fleshy, juicy, with smooth skin and various colors and patterns. Most seeds are oval, black, red, sometimes white, yellow, light green or striped, with smooth edges and obtuse base, and they are in the flowering and fruiting period in summer.
Extended data:
Growth habit
Watermelon likes warm and dry climate and is not cold-resistant. The optimum temperature for growth and development is 24-30 degrees, the optimum temperature for root growth and development is 30-32 degrees, and the lowest temperature for root hair generation is 14 degrees. Watermelon needs a large temperature difference between day and night during its growth and development.
Watermelon is drought-tolerant and moisture-intolerant. Too many rainy days and too high humidity are easy to get sick. Watermelon likes light, has a long growth period and needs a lot of nutrition. With the growth of watermelon, the fertilizer requirement increases gradually, and reaches the maximum when the fruit grows vigorously.
Watermelon has strong adaptability, and sandy soil with loose soil, deep soil layer and good drainage is the best. Like weak acidity, PH5-7.