Henderson grapefruit trees are considered an important grapefruit variety, and were first produced in the early 1970s. Henderson is a seedless variety and is extensively used in the commercial cultivation of grapefruit. The variety has a large market as a gift item, for eating fresh and for processing. The fruit has a bright red flesh, brighter than the Ruby Red grapefruit, and a reddish blush on the skin, which is also three to four shades darker than the Ruby Red. The flesh color of Henderson grapefruits persists, well into the season.
Duncan grapefruits are produced on trees which were initially grown in Florida in 1892. The fruit is slightly ovate to round, and about 3 ½ to 5 inches wide, with a very light yellow or white peel. The pulp of the fruit is buff and divides into 12 to 14 segments. Duncan grapefruits are highly flavorful and juicy with medium-sized seeds. Duncan trees are highly cold-hardy and the fruit is ready to harvest from early to mid-season. Though Duncan trees have been among the most popular in the United States, it is losing popularity to newer varieties with less seeds.
Marsh grapefruits are also referred to as marsh seedless grapefruit. The medium sized fruit is round to ovate in shape and 3 ½ to 4 ¾ inches wide. Marsh grapefruits have a very light yellow, slightly aromatic, smooth peel. The pulp is buff and divided into 12 to 14 segments. The fruit is very juicy and highly flavorful. Marsh grapefruits have very few or no seeds at all. The fruit stays well on the tree and can be harvested from mid to late season. Marsh grapefruits also store very well after harvest and are one of the leading varieties grown in California, Florida, Texas and Arizona.