Nuts for Fruits

What a fool I am; I can’t even follow my own advice! A couple of days ago I planted an apricot tree that I had ordered a few weeks previously. All of which compounds my foolishness because I had plenty of time to ponder the purchase, even cancel it if I came to my senses before it’s arrival mail-order.

Planting an apricot tree may not seem foolish to you. But it is, as I’ve advised many people. The reason is that here in the northeast, perhaps even east of the Rocky Mountains, an apricot is unlikely to bear fruit. The plant hails from regions where winters are steadily cold and spring temperatures creep steadily upward. Over most of continental U.S., winter temperatures fluctuate wildly up and down, predisposing the plants to

My apricot hope for the future.

disease such as ominous-sounding, and truly debilitating, valsa canker. Trees typically die either quickly or slowly.

If only that were all . . . Apricot blossoms open at the first hint of spring warmth. The pinkish buds unfolding against the brownish red stems are a beautiful and welcome sight on the heels of winter, but those early blooms could -- usually are -- knocked out by subsequent frosty weather. Damaging, late frosts are least likely to occur near large bodies of water, such as the ocean and Great Lakes. Late frosts are most likely to occur in low-lying regions into which cold air sinks on still, spring nights; that would be here on my farmden in the valley of the Wallkill River.

If only that were all . . . Even if the trees stay alive through winters and their blossoms escape spring frosts, the fruits themselves are the target of a number of insects and diseases. Plum curculio, oriental fruit moth, brown rot, black knot . . . the list goes on of afflictions that can reduce the crop to zero. Oh, and did I mention squirrels. My father had a tree that every Father’s Day was stripped of every one of its small, green developing fruits by squirrels.

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Did you ever taste a perfectly ripened apricot, one that’s soft and ready to travel no more than arm’s length from the branch to your mouth? I have (when I worked at the USDA Fruit Laboratory and at a friend’s orchard; he has a good site). Perfectly ripe, the fruit tastes nothing like a lemon, as market apricots usually do, but has just a hint of tartness to offset its rich, sweet flavor. For that, I planted the tree.

My friend Lev with his apricot trees

I wrote that “apricot is unlikely to bear fruit.” “Unlikely” does not mean “never.” A crop of apricots even one year out of -- say -- every five years will justify, for me, the space and trouble the tree will entail.

I was smart in a couple of ways with my apricot tree. I bought it from a nursery that specializes in fruit trees (www.cumminsnursery.com) and I planted in full sun in well-drained, moderately fertile soil. And the variety is Jerseycot, one of the varieties most resistant to some of the pests and the vagaries of our winter and spring weather.

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More foolishness: I just received a confirmation for a nursery order, soon to arrive, that includes a camellia bush. Let me explain. I love living in the northeast but do bemoan the inability to grow certain plants not hardy here, among them southern magnolia, citrus, and camellia. I’ve been tempted to plant the hardiest southern magnolia, Edith Bogue, but

My "citrus" plantation.

restrain myself realizing that the plant might survive but would never become a majestic specimen the tree is meant to be. Citrus? I resign myself to growing some citrus in pots, indoors in winter and outdoors in summer.

The last few years have seen the development of hardier camellias. Long Island Pink is one of the hardiest, with compact stature, glossy evergreen leaves, and single pink flowers in autumn. Still, it’s not really hardy here. I’ll plant it in the partial shade near the northeast corner of my home, protect it through winter its first few years as it develops cold-hardiness, and perhaps my foolishness will pay off.

Citrus in New York?

Winters have been warmer here for the past few years and, so far at least, this winter is playing out to be the warmest ever. But even the “global warming” cloud has its silver lining. Snow is great fun and cold is invigorating but one of my regrets in living in a cold winter region has been not being able to harvest fresh citrus fruits from outdoor trees. If things keep progressing in their present direction, as predicted, that situation may change.

The coldest temperature so far this winter has been down around 9° F, and three of my citrus plants still look fine. In the ground, outdoors! Technically, they are a citrus relative, Poncirus trifoliata, also known as trifoliate orange. The leaves resemble citrus leaves, the white flowers resemble and have the fragrance of citrus flowers, and the fruits, orange and an inch-and-a-half across, resemble citrus fruits inside and out. Too bad poncirus is barely edible, although it can be squeezed for juice that is diluted and sweetened to make an -ade.

Flying Dragon poncirus

Even if poncirus was not edible, it would be worth growing for its beauty, especially the Flying Dragon variety with its contorted, green (and thorny) stems and leaves.

My three poncirus plants started out as seeds plucked from a fruit on a plant growing against a brick wall in northern New Jersey. The seeds sprout and grow easily. After growing one year in pots, into the ground they went. The first couple of years, winter lows of -10° and -19° killed them back to the snow line. They’re allegedly cold-hardy below zero degrees F., but that hardiness comes with age. Also, the pattern of cold development and its duration affects cold-hardiness. This year, so far, the plants look fine from top to bottom.

Poncirus is close enough to citrus botanically that its been hybridized with citrus to make more edible, albeit less cold-hardy, hybrids. Like the citrange, from the mating with sweet orange, hardy to 5 to 10°F. A few varieties of citrange have been developed, all billed as “approaching edibility” but, like poncirus, making a good -ade.

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Not to give up on true citrus -- yet. Probably the hardiest is yuzu, a hybrid of a sour mandarin and the barely edible Ichang papeda (C. ichangensis). Ichang papeda is the hardiest evergreen citrus. (Poncirus sheds its leaves in winter.) So yuzu is a true citrus and it is quite cold-hardy, down to about 10°F. And it is eaten. The great plant explorer, Frank N. Meyer described it, in 1914, “rind full of oil glands, smelling like a fine lemon; segments separating easily; fairly juicy and of an agreeable sharp sour taste.”

Mandarins (tangerines, C. reticulata) are also among the hardiest of citrus, and they taste very good straight up. The deep orange fruits of the variety Changsha are sweet and juicy, and I actually have a potted plant from which I’ve been trying to coax fruit for more than 5 years -- or so I thought.

Today I checked the original bag in which I received cuttings of the alleged Changsha. Turns out the name scrawled on the bag is Changshou, not Changsha. Bummer, I was looking forward to Changsha. Changshou is another hardy citrus-type fruit, actually a kumquat, from the closely related genus Fortunella. Kumquats are cold-hardy to between 10 and 20°F., and are a fruit I’ve grown -- indoors in winter, outdoors in summer -- for many years. 

Meiwa kumquat

Kumquats, like poncirus, hybridize readily with citrus species. Hmmm, why not combine the hardy kumquat with the hardy mandarin? It’s been done, the result of the mating being the Nippon orangequat, hardy to 10°F. and with a mild flavor, if left to hang on the plant long enough, and, like a kumquat, having an edible skin.

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Except for poncirus, I’m not really hoping to harvest any citrus-type fruits from outdoor plants anytime soon, perhaps ever. Surviving the depths of winter cold is one thing. The plant also has to be able to ripen its fruit within the growing season. My Meiwa kumquats, for instance, ripen in February, and I expect even a few nights in the 20s would turn the fruit to mush.

For now, then, I continue growing the more edible citrus-type fruits in pots that winter indoors. Still, poncirus, that citrus look-alike will look cool out in the landscape.