Grapefruit Ruby Red
variety of grapefruit (Citrus paradisi), “Ruby Red” yields red seedless flesh inside its reddish yellow fruit. Also known as “Redblush” grapefruit or just “Ruby” grapefruit, “Ruby Red” is a fast growing tree that can reach 20 to 25 feet tall and wide when planted in well-drained loam to sandy loam soil. Like other varieties of grapefruit, it is particularly frost sensitive, and its fruit can be damaged when temperatures drop below 29 degrees Fahrenheit. Because of this, “Ruby Red” should be grown in full sun in U.S. Department of Agriculture plant hardiness zones 9 through 10.