Watermelons thrive in warm climates worldwide, originating from Africa and now cultivated across numerous countries and U.S. states.

Native Origins

Watermelons (Citrullus lanatus) are native to regions in northeastern Africa, including Egypt, Ethiopia, Libya, and Sudan, where wild varieties grow in grassland, bushland, and sandy soils near watercourses up to 1,785 meters elevation. They flourish in dry conditions with limited rainfall, spreading as annual vines up to 10 meters long with hairy stems, lobed leaves, and yellow flowers.

Global Cultivation

Introduced to over 100 countries, watermelons grow in tropical to temperate zones needing temperatures above 25°C (77°F), well-drained sandy loam (pH 5.7-7.2), and full sun. Key producers include:

  • Africa : Sudan, Nigeria, and South Africa for wild and cultivated types.
  • Asia : China (world's top producer), India, and Turkey.
  • Americas : U.S. (44 states, led by Florida, Georgia, Texas, California, Arizona), Brazil, and Mexico.
  • Europe and others : Spain, Canada (in sunny southern regions), and Australia.

U.S. Production Hotspots

In the U.S., commercial farming yields over $500 million annually, with Florida leading due to its ideal sandy soils and heat. States like Texas and California plant seeds in late spring once soil hits 70°F, spacing vines 3-5 feet apart in rich, amended soil.

Growing Conditions

Vines spread on the ground, producing large fruits (up to 70cm) with red, pink, or yellow flesh and flat seeds; they require pollination by bees, irrigation, and pest control. Home gardeners start seeds indoors or transplant after frost, harvesting when the underside turns yellow.

TL;DR : Watermelons grow best in hot, sunny spots on sandy soils globally, from African origins to major farms in China, the U.S. (esp. Florida), and beyond.

Information gathered from public forums or data available on the internet and portrayed here.