FROM PAST TO PRESENT
Br-r-r-r-r-r
This post originally appeared November 7, 2009. Here’s an update with commentaries on how things have changed — and not changed — over the past 11 years.
Dateline: New Paltz, NY, October 19, 2009, 5:30 am. I bet my garden is colder than your garden. I was startled this morning to see the thermometer reading 23 degrees F. Not much I could do at that point about protecting “cold weather” vegetables still in the garden, some covered with floating row covers and some in “plein aire.” The thing to do under these circumstances was wait for the sun to slowly warm everything up and then assess the damage.
2009
I ventured out to the garden for a survey in the sunny midafternoon. Joy of joys. None of the cold-hardy vegetables was damaged by the cold. Romaine lettuces stood upright and crisp, arugula was dark green and tender, radishes were unfazed, and the bed of endive, escarole, and radicchio looked ready to face whatever cold the weeks ahead might offer.
That 23 degree temperature reading came from my digital thermometer, read indoors from a remote sensor out in the garden. Most surprising was the reading from the old-fashioned minimum/maximum registering mercury thermometer out in the garden. This thermometer remembered the night’s lowest temperature as 20 degrees F. Brrrrrrrr.
2020
Dateline: New Paltz, NY, November 11, 2020. This fall has likewise had a few frigid dips in the thermometer, down a couple of times to 24°F, and cold temperature vegetables have likewise fared well. Nowadays I check temperatures with a high-tech, but reasonably-priced, Sensorpush, a small sensor strategically hung in the garden. It beams current temperature and humidity back to my smartphone, and keeps a record of them throughout the day, week, month, and year. Its reporting jives with that of my “old-fashioned minimum/maximum registering mercury thermometer”.
What has changed is the weather over the past couple of weeks, with sunny days and temperatures hovering around 70°F. A fitting closing for a stellar year in the garden: best harvest, best fall color, congenial weather.
The effect of microclimate has been startling. I live about 4 miles out of town, on a road that follows the valley along the Wallkill River. On clear nights, radiation frosts spill cold air downhill to bring the temperature at the farmden about 5° colder than in town. A couple of evenings ago, temperature in town, as displayed on the local bank building and on my car thermometer as I drove through town, was 55°. Arriving at the farmden, the car thermometer, Sensorpush, and the “old-fashioned minimum/maximum registering mercury thermometer” registered 42° — quite a dramatic difference for a 40 foot elevation difference.
Mediterranean Fancies
(2009) Moving, figuratively, to warmer climes: the Mediterranean. I’m taking the Mediterranean diet one step further by trying to grow some of the delectable woody plants of that that region.
Figs are a big success, and not an unfamiliar sight well beyond their natural range. I’ve tried all the usual methods of growing them in cold climates. I’ve grown them in pots brought indoors for winter; I’ve bent over and covered or buried the stems to protect them from cold; I’ve swaddled the upright stems in leaves, straw, wood shavings, or other insulating materials. All yielded some fruit, but none of these methods beats having a small greenhouse with the trees planted right in the ground. Handfuls of soft figs, so ripe that each has a little tear in its “eye,” follow each sunny day and should do so for a few more weeks.
Bay (as in “bay leaf”) also does well, this one potted. After 20 years, my bay laurel is a
Bay laurel, 2009
handsome little tree, trained to a ball of leaves atop a single, four-foot trunk. The fresh leaves are much more flavorful, almost oily, than dried leaves, especially the old, dried leaves typically offered for sale.
(2020) Yes, figs have been abundant in the greenhouse over the past 11 years. But diminishing sunlight and cooler temperatures, even in the greenhouse (37° minimum temperature), have drained the flavor from the few ripe, remaining figs.
After 30 years, the bay is still thriving, valued as much for its beauty as for the flavor of its fresh leaves. It’s still trained as a small tree, smaller than in the past. I lopped the whole plant to the ground a few years ago to give it a fresh start, trained as round-headed tree only thirty inches tall.
Bay Laurel 2020
(2009) Three hopeful Mediterranean transplants are my olive, feijoa, and lemons. I purchased the olive tree in spring, whereupon it flowered and has actually set a single fruit! The feijoa, also known as pineapple guava, has two fruits on it, which might not seem like a big thing except that those two fruits represent the culmination of about 15 years of effort. (More on that some other time.) True, feijoa is native to South America, but it thrives and is often planted in Mediterranean climates. The same goes for lemon, except that it is native to Asia. My Meyer lemon hybrid, like the olive, was potted up this past spring and sports a single fruit.
The long shots among my Mediterreans are pomegranates. My two plants – the varieties Kazake and Salavastki – are cold-hardy, early ripening, sweet varieties from central Asia, so should do well here in a pot. (They are cold-hardy for pomegranates, down to a few degrees below zero degrees F.) They have yet to flower and fruit.
In a few weeks I’ll move all the potted fruits to the sunny window in my very cool basement, where winter weather is very Mediterranean-esque.
(2020) All three trees are still residents here, although the feijoa tenuously so. It’s a pretty plant but what I really want from it is fruit. Yields have been paltry. I’ve repeatedly threatened it with the compost pile, but repeatedly reneged. Besides its beauty, it often flowers, and the flower petals, fleshy, pinapple-y, and minty, are delicious.
One year, in an effort to downsize plant-wise, I was also going to walk the olive to the compost pile. And then someone reminded me that the olive is a symbol of peace, so I kept it. It’s a pretty plant, an easy to care for houseplant, and occasionally bears tasty olives.
The Meyer lemon offers so much everything: deliciously fragrant flowers, verdant leaves year ‘round, and tasty lemons. Just not enough of them. Meyer lemon is actually a hybrid of lemon and sweet orange.
Pomegranate is still a long shot. I’m down to one plant, Salavastki. It often flowers and sets a few fruits, but the fruits drop off. I’m still not sure why.
Still Great After All Those Years
2009
(2009) Persimmon is another tree grown in Mediterranean countries, although it’s not native there. Up here, I grow American persimmon, an outdoor tree that is cold hardy to below minus 20 degrees F.. Besides yielding delectable fruits, it’s a tree that requires almost no care, not even pruning. Some of the tree’s branches are deciduous, naturally dropping in autumn.
Heavy winds of a few weeks ago took the persimmon’s self-pruning theme too far and blew the top off my 20 year old tree. Fortunately, my three other persimmon trees remained unscathed. I’ll just trim the break from the decapitated tree and it will be fine.
2020
(2020) Persimmon is still thriving, still care-free, and still delectable, the ripe fruits tasting like dried apricots that have been soaked in water, dipped in honey, and given a dash of spice. My persimmon “herd” has been thinned to my two best-tasting, most reliable varieties: Szukis and Mohler. Both are well-adapted to ripening in the the relatively short season (for a persimmon) this far north. Right now, the leafless tree is leafless and still loaded with fruit for the picking, much more than I can eat.
THE SHOW GOES ON
Lesser Known
A whole slew of clear, sunny days and cool nights caused sugar maples to put on a particularly fiery show of yellow and orange leaves this fall. That’s mostly over now around here — but a number of other trees and shrubs, many not well known, are keeping my farmden and beyond colorful longer.
Little known, for instance is Persian ironwood (Parrotia persica). I planted it years ago as a shade tree. Big mistake! For shade, that is. It doesn’t grow very large and is more of a large, multistemmed shrub. I’m glad I planted it, though. The smooth, gray stems grow thick and often horizontally, then downward a little before heading skyward, sort of like a miniature beech.
But I’m writing about color, and Persian ironwood has it, the leaves emerging purplish in spring, turning a lustrous green in summer, then morphing into variable shades of yellow, orange and red in autumn.
Also not well known is Korean mountainash (also called Korean whitebeam, Sorbus alnifolia). It’s closely related to more familiar mountainashes except in a different subgenus, Aria, with simple, rather than compound, leaves. I first saw this tree one fall at the Scott Arboretum in Pennsylvania and, knowing the tiny fruits make a good nibble, ate some. And knowing a whole tree can be grown from a tiny seed, I saved some seeds for planting.
That was in 2006, and the tree is now about 20 feet tall and draped in rusty red leaves that are splashed with yellow. As with the sugar maples, the color is particularly good this year — and fruits, which I’ll be nibbling, are also particularly abundant. As an added plus, the tree, each spring, is draped in large clusters of foamy, white flowers.
Another rare bird is Japanese stewartia (Stewartia pseudocamellia) which I planted — was it for its bark, for its flowers, or was it for its autumn leaf color? All are outstanding. The bark exfoliates in the same way as does sycamore, leaving silvery gray and charcoal gray patches against a khaki background. Its cup-shaped, white flowers with yellow center are like camellias, a relative. Right now, the leaves are a warm terra cotta color shading, in parts, to yellow.
Stewartia
Fothergilla (Fothergilla gardeneii) is one more lesser known plant now aglow here. This small shrub’s leaves’ traffic-stopping, rich red color is heightened by occasional blushes of yellow and dark red. Back in spring, candles of fragrant, creamy white flowers perched atop the ends of stems.
Known for Their Fruits
Some plants that I grow for their fruits are also more than earning their keep with fall color.
Huckleberry (Gaylussacia baccata) is among the best of these, and the color makes up for its relatively poor yield of fruit. The deep red leaves look pretty highlighted among the evergreen leaves of rhododendron, mountain laurel, and lingonberry in my “heather bed.” (All are in the Heather Family, Ericaceae.) Where the plants are really spectacular is in the Shawangunk Mountains that rise up just west of here. There, whole swaths of plants paint the forest understory red.
Pawpaw (Asimina triloba) is another fruit plant here, this one with many tropical aspirations. Tropical aspirations? It’s the northernmost member of the mostly tropical Custard Apple family (Annonaceae); its fruit has taste and texture reminiscent of banana; the fruits hang in clusters like bananas; and its long, drooping leaves would be visually at home in tropical climes. Come fall, the plants shed those tropical aspirations as the leaves turn clear yellow, especially nice when backlit by sunlight.
I often rave about blueberry for its ease of growth, its pretty, white flowers in spring, its long season of harvest, its health benefits, and of course, its delicious fruits. I’m sure I’ve also mentioned its fall color, to me one of the best of all plants, mostly crimson but depending on the variety and the season, also with some yellow.
(I delve into the planting and use of these and other ornamental fruit plants in my book Landscaping with Fruit.)
Look Down
Perhaps it was a couple of particularly cold nights, with temperatures dropping into the low 20s, that caused leaves to all of a sudden drop all at once from certain trees. At any rate, the beautiful carpets blanketing the ground beneath these trees have caught my eye.
Pawpaws, for one, the overlapping, large leaves thoroughly hiding the grass beneath them.
Even at their best, mulberries leaves are nothing to look at in fall (but the trees do have other ornamental attributes, so did make it into Landscaping with Fruit). This year, though, the green leaves that plopped onto the ground following the cold nights did catch my eye. Perhaps it was the low angle of the sun reflecting off them; perhaps it was their shine.
One tree whose leaves are perhaps at their best on the ground in ginkgo (Ginkgo biloba). This one is edible, allegedly delicious, but did not make it into my book. The edible part is the nut (seed) inside the fruit. The problem, for me, is that the fallen fruit smell like an open sewer. Really!
The way around this is to forgo the fruit by planting a male tree. The fan-shaped leaves of this living fossil, whose appearance dates back to the Early Jurassic, turn the clearest yellow imaginable in fall. They’re at their best when they drop, making the ground look as if a sunbeam had fallen from the sky.
I haven’t — yet? — grown ginkgo myself.
ABOUT PEPPERS
Better Late than Never
Cold has finally gotten the better of my pepper plants. Two below freezing nights a month ago started their demise, and two more during the last few nights finally finished them off for the season. Not the fruits, though, plenty of which are piled and spread out in trays and baskets in the kitchen.
Outdoors, fruits weathered the below freezing temperatures well. They’ve been shielded from the full brunt of cold by their canopies of increasingly floppy leaves. Also, fruits of plants are higher in sugars than are the leaves. Thinking back to high school chemistry, I recall that any solute, such as sugar, lowers the freezing point of the solution. So pepper fruit cells can tolerate more cold than pepper leaves.
Even with the plants dead outside, the pepper season isn’t over here. The season has been greatly extended by harvesting and bringing indoors sound, green peppers showing any bit of red — or yellow if that’s the pepper’s ripe color. Sitting in trays and baskets in the kitchen, these mostly green peppers have been ripening, depending on when they were harvested and how long they’ve sat, to fully red or yellow color, when they are most flavorful (to me).
For some reason, perhaps the heat interfering with pollination, peppers started ripening later in the season than usual. The present and the past few week’s abundance of them makes up for the late start.
Thank You C2H4
For the peppers’ morphing from green to red or yellow, I have to thank, in large part, a simple gas made up of just two atoms of carbon and four atoms of hydrogen. It’s ethylene, a plant hormone. Most plant and animal hormones are much more complex molecules.
Ethylene is produced naturally in ripening fruits, and its very presence — even at concentrations as low as 0.001 percent — stimulates further ripening. The ethylene given off by ripe apples can be used to hurry along ripening of tomatoes, by placing an apple in a closed bag with the tomatoes.
Banana, apple, tomato, and avocado are among so-called climacteric fruits, which undergo a burst of respiration and ethylene production as ripening begins. These fruits, if picked sufficiently mature, can ripen following harvest.
Peppers, along with “figs, strawberries, and raspberries are examples of non- climacteric fruits, whose ripening proceeds more calmly. Non-climacteric fruits will not ripen after they’ve been harvested. They might soften and sweeten as complex carbohydrates break down into simple sugars, but such changes might be more indicative of incipient rot rather than ripening or flavor enhancement.” Or so they say. And, I admit, I’ve said; that quote is from my book The Ever Curious Gardener. (The rest of the section about ethylene in my book is correct.) They and I were wrong.
So, I’ve learned two things. First of all, pepper do ripen well after harvest, not only to a bright color but also to a delicious flavor. And second, further reading has revealed that hot peppers, but not sweet peppers, are, in fact, climacteric fruits.
What about semi-hot peppers? Or non-hot hot peppers? (Read on.)
Hot and Not
I did also grow some semi-hot peppers this season. Roulette is a variety billed as resembling “a traditional habanero pepper in every way (fruit shape, size and color, and plant type) with one exception – No Heat!” Roulette had an interesting flavor that I both liked and didn’t like (mostly liked), and occasional ones did have some heat to them, but that might have been due to their proximity to . . .
Red Ember is billed as an early ripening hot pepper with “just enough pungency for interest.” It definitely caught my attention when I bit into one! Call me a wimp, but I thought it was fiery hot.
Peppers, Red Ember and Roulette
In my previously mentioned book, The Ever Curious Gardener, I also explored flavor in fruits and vegetables and, briefly, hotness in hot peppers. “Studies have been done with peppers, focusing specifically on their hotness, which, to muddy the waters, stems from not one, but from a whole group of compounds, capsaicinoids, mostly capsaicin and dihydrocapsain. Hotness in peppers was found to depend on the variety, the environment, and the interaction between variety and environment, with smaller fruited peppers less influenced by vagaries of the environment. Usually, but not always, a pepper will have more bite if plants are grown with warmer nights, with colder days, with just a little too much or too little water, or with fertility imbalances; increased elevation elicits the fiercest bite. Basically, with any sort of stress.”
Uncommonly hot temperatures this summer may very well have turned up the heat in Red Ember and put some heat in Roulette.
