Citrullus, lanatus

Watermelons grow on a trailing vine in the same fashion as their close relative cucumber. Melons are tropical plants that need temperatures between 77-86F (26-30C) to grow well. Nothing says summer like watermelon.

There are around 50 types of watemelons, including hybrid seedless, mini, orange and yellow. Melons fall into a different botanical classification but thrive in the same conditions. Organic and heirloom varieties are available.

Ideal Location- Watermelons should be grown under cloches, in a hoop house, coldframe, large containers, or greenhouse, in a warm, well-drained soil rich in organic matter, but not too fertile. Prior to planting apply a medium-fertility soil improver plus a general organic fertilizer. The ideal pH is 6.5-7

Cultivation- when starting watermelons undercover sow 6 weeks before the last frost. Sow in 2 ½ - 3 ½ ((6-9cm) pots with the seed sown on its side. Thin to on plant per pot. Once germinated keep light and warm 55-61F (13-16C)

When planting directly outdoors put cloches in place several week in advance to warm the soil. Plant out in June in a slight mound about 1 ½ in (4cm) to help keep the stem above the grown and therefore dry and free from rot. Water in rather than firming the soil.

 

Plant Care- Protect from cold weather. Once fruiting shade plants from hot sun. As flowering starts allow pollinating insects access to plants or hand pollinate if growing undercover. Water regularly. Feed plant grown in containers with a high potash fertilizer once flowers have set

Pinch out the growing tip of each flowering shoot about 2 leaves beyond the flower. Leave 4 to 5 fruit of uniform size per plant picking of the rest at grape size.

Spacing- watermelons on the ground 3 to 5 ft x 5 ft (1 to 1.5 m x 1.5 m)
Trained up stakes or netting 15 in (38cm) single cordon 24in (60cm) for double cordon.

Harvesting– Watermelons are ready to pick in late summer or early autumn. Ripe fruits are sweet smelling.

Problems- Aphids, cucumber beetles, powdery mildew, bacterial wilt, and squash vine borer.

Nutrients- watermelons contain antioxidants including beta-carotene. Beta-carotene acts as an antioxidant in the body and may help reduce the risk of some cancers. Melon is also a good source of potassium and vitamins A, B1, B6 and C. With it’s high water content watermelons are also a good source of fluids.