The Flame grapefruit has a blush red exterior and intensely red interior. It's a vigorous producer, and one of the more cold hardy varieties. It should bear fruit starting in February.
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Rootstock availability: Rubidoux and Flying Dragon (dwarf).
The UGA Pink Frost Grapefruit is probably the most cold tolerant grapefruit you can find. It has a red flesh and is similar to a grapefruit you might find at your local grocery store.
The Rio Red Grapefruit is a relatively newer variety that sports a blush pink exterior and red interior flesh. It's one of the more cold tolerant grapefruits and should bear fruit starting in February.
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Rootstock availability: Rubidoux and Flying Dragon (dwarf).
