Heirloom Watermelon Varieties

Depending on your area, one of these heirloom watermelon varieties may hold the key to a delicious summertime treat.

| September/October 2012

  • Watermelons_MoonAndStars_Yellow_BakerCreek
    Moon and Stars
    Courtesy Baker Creek Heirloom Seeds
  • Watermelons_KleckleysSweet_BakerCreek
    Kleckley's Sweet
    Courtesy Baker Creek Heirloom Seeds

  • Watermelons_MoonAndStars_Yellow_BakerCreek
  • Watermelons_KleckleysSweet_BakerCreek

For me, watermelons are one of the most amazing crops to grow. From skinny vines and small, pale yellow flowers there appears a fruit whose succulence and sweetness punctuates the summer experience. Throughout our country, we tend to have different experiences when it comes to watermelon growing and eating.

Watermelon loves heat and lots of it. In most of the cooler parts of the country, for example the Northeast, the large, oblong and weighty melons will not mature. The rounder shorter-season varieties of watermelon, sometimes dubbed icebox watermelons, will usually do well depending on the weather, latitude and elevation. A slightly cooler summer or a rise in elevation may not allow melons to fully ripen in some locations. In northern coastal or mountain areas, watermelon cultivation outside of a greenhouse may be impossible.

Heirloom watermelons of comparable size typically ripen later than hybrids. For growers in cooler climes, heirlooms are riskier. In the case of northern regions, there are a number of modern varieties that will mature a couple of weeks earlier, such as Golden Midget, Sugar Baby and Blacktail Mountain.

Watermelon, Citrullus lanatus, is a frost-sensitive annual vine with deeply indented, lobed and hairy leaves with climbing tendrils. It is a member of the squash family, and it has a superficial resemblance to squash plants. The vines produce unisexual flowers — that is, either male or female flowers as opposed to bisexual or perfect flowers like a lily or rose. Its fruit is a large berry called a pepo.

The genus Citrullus comprises four species, including watermelon and Citrullus colocynthis, a perennial known as bitter gourd or apple, which occurs as both a wild and domesticated plant. It was used as a purgative and antiparasitic — among other uses — since ancient times and is mentioned in the Bible.

Two other species of Citrullus are endemic to the Namib Desert of southwestern Africa, C. ecirrhosus and Citrullus rehmii.

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