Ruby Sweet Grapefruits
Citrus x paradisi 'Ruby Sweet'
There are currently 3 popular varieties of pink/red grapefruits commonly called 'Ruby Sweet' that are easy to grow in Florida.
Ruby Red is sometimes called 'Redblush' or even just 'Ruby Sweet'.
Ruby Red is the most well known of the pink grapefruits, since it was discovered in Texas in 1929. It is thought to have been a limbsport of the Thompson seedless (Marsh Pink) variety of grapefruits. The early season fruits are the reddest, fading to pink by mid-season and nearly white by spring. First citrus variety to be patented (1934).
Ray Ruby is an improved hybrid of Ruby Red: a useful mutation of the Ruby Red discovered in a Texas grove in 1970; flesh color and exterior blush is more red than the Ruby Red, has good fruit size and shape, and excellent yields -- very comparable to the Ruby Red. Often has less seeds than the Ruby Red. Holds the red flesh color longer into the season than the Ruby Red.
Released for sale in 1986.
Star Ruby is the reddest and the sweetest of the red grapefruits.
Ruby Red & Ray Ruby are actually considered pink grapefruits, compared to the Star Ruby, a red grapefruit. Sometimes called "Sunrise" or 'Jaffa Sunrise'.
Not as hardy as the other two: needs steady heat and humidity but not too much heat, and is less vigorous growing. Fruit is smaller, but has a low acid content, so it is much sweeter as grapefruits go. Ought to do well especially in 9b.