This section is from the book "Manual Of Gardening", by L. H. Bailey. Also available from Amazon: Manual of Gardening.
The watermelon is shipped everywhere in such enormous quantities, and it covers so much space in the garden, that home-gardeners in the North seldom grow it. When one has room, it should be added to the kitchen-garden.
The culture is essentially that for muskmelons (which see), except that most varieties require a warmer place and longer period of growth.
Give the hills a distance of 6 to 10 feet apart. Choose a warm, "quick" soil and sunny exposure. It is essential, in the North, that the plants grow rapidly and come into bloom early. One ounce of seed will plant thirty hills.
There are several white or yellow-fleshed varieties, but aside from their oddity of appearance they have little value. A good watermelon has a solid, bright red flesh, preferably with black seeds, and a strong protecting rind. Kolb Gem, Jones, Boss, Cuban Queen, and Dixie are among the best varieties. There are early varieties that will ripen in the Northern season, and make a much better melon than those secured on the market.
The so-called "citron," with hard white flesh, used in making preserves, is a form of watermelon.
 
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