Two pumpkin seedlings are joined together to cultivate a new main vine. The new main vine absorbs and supplies nutrients from the roots of the two pumpkin plants. The melon yield can be doubled and the quality is greatly improved. Hollow out and plant. Dig the transplanting hole 10 days before planting. Apply more organic fertilizer and phosphorus and potash fertilizer in the hole. Mix the fertilizer and soil evenly and fill it into the hole so that it is slightly higher than the field surface. Plant 2-4 pumpkin seedlings in each hole, with a spacing of 25 cm between seedlings. Cut and connect. The main vines of the melon seedlings are connected together when they are 60 cm long.