Cold-hardy citrus for gardeners who thought they could not grow their own. Selected to take a real Southern winter, these are the lemons, mandarins, and kumquats that fruit outdoors where tender citrus would fail, many of them reliable in Zone 8 with no more shelter than a warm wall.
The Yuzuquat is a tri-generic hybrid, a curiosity even among unusual citrus. One parent is the yuzu, itself a cross of Citrus ichangensis and Citrus reticulata; the other is the 'Nagami' kumquat, Fortunella margarita. From that three-way pedigree comes an attractive evergreen citrus that bears sour, juicy, lemon-like fruits about the size of a chicken egg.
NuClem is a special clementine among the cold-hardy citrus, a nucellar selection of the familiar clementine mandarin. Our friend and citrus guru Tom McClendon, who shared this one with us, explains it best: "NuClem is a nucellar Clementine, meaning that it comes true from seed. Most Clementines are polyembryonic, meaning that seeds will almost always produce hybrids with other citrus nearby. NuClem also is distinctive in its cold-hardiness, having proven reliably hardy in Montezuma, GA, making it probably on par with Satsuma. Fruit is globular, about two inches in diameter, with a mildly adherent peel more like an orange than a mandarin. Fruit quality is excellent."
The Meyer lemon is the great container citrus, beloved for thin-skinned, deep yellow-orange fruit that is sweeter and less acidic than a true lemon, and for fragrant, purple-tinged white flowers that come more than once a year. A small evergreen tree, the Meyer is thought to be a natural hybrid of lemon and some other citrus, probably a sweet orange or mandarin, which accounts for the mellow, almost floral flavor that has made the fruit a favorite of cooks.
Fortunella obovata 'Changshou' is the Changshou kumquat, the sweetest and most generous of the kumquat tribe, whose fruit swells to the size of a ping-pong ball, far larger than the little oval kumquats most people know. Round to gently obovate, ripening bright orange, that fruit is eaten whole, skin and all, the thin rind sweeter and more tender than any other kumquat's. A compact, dense, thornless evergreen, the Changshou is as pretty in a pot as it is productive.
Woodlanders has long championed hardy citrus, the trifoliate hybrids that push oranges and their kin well beyond the usual citrus belt, and 'Benton' is one of the toughest of the group. The plant is a citrange, a deliberate cross between the sweet orange, Citrus sinensis, and the hardy trifoliate orange, Poncirus trifoliata, that legendary deciduous, thorny survivor of cold-country citrus breeding. The name citrange simply fuses citrus and orange, and the hybrids inherit the trifoliate orange's remarkable cold tolerance.
Woodlanders has long led the way in offering cold-hardy citrus, the kinds that carry fruit well beyond the usual citrus belt, and Ichang Lemon is a favorite of the group. The plant grows as a medium, evergreen small tree with large leaves on winged petioles and thorny branches, opens the fragrant white flowers typical of citrus in spring, and follows with very large, lemon-yellow, fragrant fruit.
The Indio mandarinquat is one of those happy accidents that citrus breeding throws up now and then, a natural cross between a mandarin (Citrus reticulata) and a kumquat (Citrus japonica) that borrows the best of both parents. From the mandarin come the size, the deep orange color, and the perfume; from the kumquat come the sweet, tender, wholly edible rind and a welcome measure of cold tolerance. The fruits hang like small golden lanterns against dark evergreen leaves through winter, oblong and glossy, and the whole tree carries a poise that belies how easy the plant is to grow.
The Lakeland limequat is a citrus lover's answer to cold: a compact, productive hybrid that pairs the hardiness of the kumquat with the bright, tropical punch of Key lime. One of three limequats bred by W. T. Swingle of the U.S. Department of Agriculture in Florida in 1909 and named for the town of Lakeland, this cross (Citrus x floridana) joins the West Indian, or Key, lime with the round Marumi kumquat (Fortunella japonica). The result carries intense citrus flavor on a plant that thrives well beyond the usual citrus belt.
The Meiwa kumquat is the sweet one, the kumquat you can pop whole into your mouth and eat skin and all. A small, tidy, evergreen citrus, Fortunella crassifolia carries round, bright orange fruit a little over an inch across, and where most kumquats offer a sweet rind wrapped around sharply sour pulp, the Meiwa softens the contrast: the peel is thick and honey-sweet, the flesh only mildly tart, so the whole fruit eats like candy off the branch.
The Nagami kumquat is the easiest citrus most gardeners will ever grow, and the only one meant to be eaten peel and all. Clusters of small, oval, sunset-orange fruit hang against dense, glossy evergreen foliage, each one a burst of contrast: a sweet, tender rind wrapped around bright, tart pulp. Pop them whole for a sweet-and-sour snap, candy the rinds, slice them into a salad, or simmer the winter harvest into jewel-toned marmalade.
The procimequat is a rare and fascinating citrus hybrid, born from a botanical marriage of the Eustis limequat (itself a cross of kumquat and lime) and the Hong Kong kumquat (Fortunella hindsii). The result is a precocious, compact plant that combines the zesty lime tang of the limequat parent with the tiny, ornamental charm of the wild kumquats, all on a frame small enough for a patio pot.
The Thomasville citrangequat is more than a fruit tree, a living piece of Southern horticultural history. First fruited in Thomasville, Georgia, this remarkable hybrid was raised in 1909 by the legendary USDA citrus breeder Walter T. Swingle and formally named in 1923. The tree stands as a pioneering achievement in citrus breeding: a three-way cross combining the cold-hardy Willits citrange, itself a cross of sweet orange and trifoliate orange, with the Nagami kumquat, Fortunella margarita.
A charming citrus hybrid for containers, winter patios, and kitchen harvests. Known as the calamondin orange, x Citrofortunella mitis 'Calamondin' is a compact, cold-tolerant citrus treasured for abundant fragrant blossoms, ornamental good looks, and tart, edible fruit. A natural cross between the mandarin orange, Citrus reticulata, and the kumquat, Fortunella, calamondin is equally at home on a patio or in a bright kitchen window, offering both beauty and bounty the year round.
Yuzu Ichandrin is not a lemon. This is something older and considerably more interesting, a naturally occurring hybrid between Ichang papeda, Citrus ichangensis, and Satsuma mandarin, long cultivated across the high-elevation citrus regions of China and Japan, and among the most cold-hardy citrus in existence. Where standard yuzu, Citrus junos, and true lemons would surrender to a Southern winter, Ichandrin holds. Mature, established trees have come through ten degrees Fahrenheit with nothing worse than tip dieback. This is, by any honest measure, the citrus a zone 7 or 8 gardener actually gets to keep.
