 Texas is also a large producer of watermelons, grapefruits, and cantaloupes.The Rio Grande valley is one of the best areas for the cultivation of grapefruit.Early varieties like the Duncan had many seeds and pale flesh, but in the 1880s citrus growers in Texas and Florida discovered pink-fleshed seedless grapefruit mutations like the Ruby, which along with red-fleshed varieties like the Rio Red and Star Ruby are preferred varieties for modern commercial production.