Though Tennessee is not a big producer of commercial-grade citrus , it is potential to arise citrus fruit in a home plate landscape , both in the ground and in pots . The land is in U.S. Department of Agriculture Plant Hardiness Zones 6 and 7 , and citrus tree trees are well grown in the warm part of the land , as they involve rich heat to create sugars and can not tolerate frost .
The good option for Tennessee are cold - hardy varieties , and even these should be embed in pot or where there is some protection . Lemons , fluxing lime , sweet oranges and Citrus paradisi are not good pick for Tennessee , as they are particularly susceptible to frost .
Changsha Mandarin
This small tree produces easy - to - Robert Peel tangerine - sized oranges that are similar to satsumas , thought not as sweet-scented . Trees are hardy to 5 degrees Fahrenheit . An honest-to-god variety that arise in China , " Changsha " ( C. reticulata ) produces a great harvest once establish and have yield in fall and early winter . This tree is best planted in Zone 7 in Tennessee .
Nansho Daidai
This loan-blend is a problematical , thorny Sir Herbert Beerbohm Tree that produces large orange yield that is similar in gustatory sensation and size to grapefruit . Trees are stout to 0 degrees and may be planted throughout Tennessee , though they should be found in protect orbit in Zone 6 . in the beginning believed to be from the Nansho district in Taiwan , Nansho ( C. taiwanica ) trees bring forth fruit in winter .
Trifoliate Orange
The unfearing of orange trees , the trifoliated orange ( C. trifoliata ) can stand firm temperature down to -20 degrees , and may be planted throughout Tennessee . Trifoliate trees are very briary and , unlike most other citrus trees , are deciduous . This tree diagram is cosmetic , as yield is sour and consider inedible . Other than for decoration , it is used for rootstock for other citrus .
trifoliated orange tree trees may be used as a windbreak or roadblock , and have curvy , misrepresented subdivision .
Yuzu Ichandarin
This mandarin orange loan-blend is a commercial-grade tree diagram in Japan and occurs by nature . The " Yuzu " ( C. ichangensis x C. reticulata ) produces a medium - sized scandalmongering or green fruit with band of ejaculate that is cherubic but lemony in spirit . The tree is hardy to 0 level and may be planted throughout Tennessee . The " Yuzu " is a act more shrub - ilk than most citrus tree , and fruit ripens in fall to early winter .
