Method suitable for strong seedling cultivation of pumpkin rootstock seedlings

The invention provides a method suitable for strong seedling cultivation of pumpkin rootstock seedlings. The method comprises the following steps of S1, soaking pumpkin seeds with warm water, then soaking the seeds with a paclobutrazol solution with the concentration of 15-30 mg/L at room temperature for the second time, then sequentially performing washing and disinfecting, and accelerating germination until radicles are exposed and grow; S2, sowing the pumpkin seeds subjected to germination acceleration in a matrix with the relative water content of 50%-60% according to the sowing depth of 1-4 cm till the seedling emergence rate reaches 80% or above, and maintaining the relative water content of the matrix to be the initial water content during the period; and S3, performing watering management on the pumpkin seedlings after seedling emergence until the pumpkin seedlings grow to the first true leaf flattening stage or grow to the stage between the first true leaf flattening stage and the one leaf and one co