The indoor temperature should be between 80-90°F (27-32°C) until germination. When harvesting watermelon, cut the stem with a sharp knife or garden tool rather than pulling the plant from the vine. You also need to prepare mounds of soil to sow the seeds in as they will drain water faster than soil on flat ground. Grow watermelon seedlings at … Start watermelon seed indoors 8 to 6 weeks before transplanting seedlings to the garden; set out transplants 2 or more weeks after the last frost in spring. Be sure not to damage the roots when you transfer this plant. If you live in a colder climate, consider starting seeds indoors or purchasing seedlings to transplant into the garden. These mounds of soil also tend to be warmer, which is … For hill planting, place the plants in a grid of squares at least 6 feet by 6 feet. Symptoms that appear under humid greenhouse conditions may be accompanied by white mycelial growth of the causal fungus, Fusarium oxysporum f.sp. Sow seed indoors in peat pots filled with seed starting mix. Filling the Container; Fill your chosen large pot with a good compost, amended with coarse builder’s sand. Transplant production requirements are more precise with seedless watermelons than seeded watermelons. Watermelon transplants with Fusarium wilt often appear wilted or the plant tops may have died back (Figure 3). The advantage of transplanting the watermelon is early harvesting. However, once the plant has melons, I doubt you are going to be able to successfully transplant it. Maturity indicators … If you are doing it as a part of a backyard remodeling project, you will probably opt for moving your plants from one place to another, inside your own garden. This will give you a small jump on the growing season. The seeds can be started indoors up to three weeks before planting in the garden; do not start sooner as large watermelon seedlings do not transplant well. Use row cover to protect plants from pests early in the season. I have planted seedlings from nurseries, but seed wherever you want them to grow … Pro Tip. For grafting techniques that require high humidity, construct a healing chamber following the instructions provided in the Washington State University Extension Publication … Step 2 Add Fertilizer to Soil. prepare watermelon seedlings for grafting, how to graft, how to heal grafted plants, and how to transplant and maintain grafted plants in the field. Getty. Its ok to transplant a watermelon to a larger space where it can grow better. Cucurbitaceae, which includes watermelons, hate any damage to their roots - even somebody just walking too close to them.If "in the ground as a small plant" means you planted a seedling, my guess is you damaged the roots when transplanting it. Just make sure to transfer the seedling to your garden as soon as you can as larger seedlings won’t transplant well. When they are small, you can transplant melon plants (thats how they sell them in nurseries.) Seedlings with Fusarium wilt symptoms may be clustered in transplant … When and How to Harvest. Ideal soil conditions for watermelon. Most plants go into shock when they are transplanted, and I imagine the melons would die. Transplanting Watermelon Seedlings. Note the reduced plant emergence and variable plant size in the transplant tray with a seedless variety (right) compared with the more complete uniform plant size in the transplant tray with a seeded variety (left) 5 … For an early variety, like 85-95 day, a plant spacing of three feet apart in rows 8 feet apart should be sufficient. Popular watermelon varieties include Sugar Baby, Sweet Favorite and Cotton Candy. Watermelon plants can suffer from anthracnose, cucumber wilt, downy mildew, and powdery mildew. Transplanting your plants is a process that involves some care and attention to detail. 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