The trifoliate orange is not known much in Michigan. To mention it in horticultural circles is a good way to get a laugh. Just say 'hardy orange.' It is used as a rootstock for citrus and it does produce a crop of oranges but not like an average orange. It was more of long shot at first to find the right strain that might survive our winters here in southern Michigan while at the same time produce some sort of citrus or citrus type fruit. Well it turns out, we were not that far off. Even though we do not have fruiting trees yet the trees are quite durable and are now close to fruiting age. During the winter of 2018 the trees took a -10 F one night with no issue. The large thorns and semi evergreen foliage create a sort of Zen garden tree with its zig-zag pattern. The fruits need a nice warm fall to ripen. The fruits are seedy yet the juice is like a super orange concentrate with a more lemon like flavor. This tree has potential uses for fencing to keep deer out as well as a means to grow some type of citrus in the north. It thrives in rock and sand. Zone 6 seed source. Ships in September of 2018. Cannot ship to CA, FL, AZ.
Plant SpecsGenus & Species:
Poncirus trifoliataSeed Source:
Zone 6 EquivalentHardiness:
Self fertile as far as we know.Soil:
Rock and sand, loam or clay loam ok. Acidic or slightly acidic is ideal.Climate:
Zone 6-7 ideal. Zone 5 experimental. Likes hot weather. Currently doing well at our zone 5b nursery in two locations both highly exposed.Ease of Cultivation:
Easy. Can often go leafless and reproduce new leaves even if deer browse them which has no effect.