Grapefruit
Grapefruit are distinguished by their high acid levels and larger fruit size (over oranges). The following cultivars are those mainly produced at Du Roi Nursery.

Star Ruby (Red flesh pigmentation)
Flame (Red flesh pigmentation)
Rosé (Pink flesh pigmentation)
Marsh (White flesh pigmentation)

Shaddock
Shaddock fruit are generally larger than grapefruit with lower acid levels and firmer juice vesicles.