Mexican "truffles"

SWEET CORN: OLD VARIETY, MODERN GROWING

Genetics: Up, Up, Up with the Sugar

I plan on eating sweet corn almost daily from about the middle of July until early autumn. I know the arguments against growing sweet corn in a backyard garden: It’s cheap at the farmstand and space-hungry in the garden. What’s more, the most modern, “supersweet” varieties hold their sweetness for days.

The supersweet varieties are truly supersweet. But “supersweet” is too much of a catchall term. Old-fashioned corn, the Papoon corn developed around 1750 by the Haudenosaunee Confederacy and still available today, is noted for its creamy texture and 9 percent sugar due to its SU gene. Unfortunately, those sugars start changing into starch as soon as an ear is harvested.

Golden Bantam sweet corn

Golden Bantam sweet corn

In the latter half of the 20th century, “Sugary enhanced” sweet corn came on the scene. The SE gene incorporated into sweet corn varieties jacked sugar levels up to 17 percent. More Sugar meant more time for sweetness to hold following harvest. SE kernels are very tender.

Soon after, another gene, SH2 or “shrunken-2,” was found, which pushed that sweetness even higher, up to 35 percent! Read more

Marigolds

A GEM OF A MARIGOLD

Some Marigold Species

Marigold is among the most widely planted and, hence, mundane of flowers, so merely writing the word is might make you yawn. Still, I count myself among those who enjoy marigolds, and welcome them as part of summer’s essence with their yolk-yellow blooms and pungent foliage. To please both camps of reader — those of you bored by marigolds and those of you enamored by marigolds — let me introduce Lemon Gem and its other lesser know kin.

Lemon Gem is unlike the marigolds familiar to most people. In fact, it belongs to a different species (Tagetes tenuifolia) than the French marigold (T. patula) or African marigolds (T. erecta) soon to open their sunny heads all over the place. You grow those marigolds for their flowers, large, solid color pompoms in the case of the African marigolds, smaller, sometimes multicolored single or double flowers in the case of the French marigolds. Read more

Old pear tree and barn

THINNED TREES AREN’T SKINNY

Avoid Extremes

A week or so ago, fruit trees were so full of blossoms that they looked like giant snowballs, foreshadowing a heavy crop of fruit later this season. Too heavy, perhaps, for the branches to support. Too heavy, perhaps, for fruits that are large and luscious. Surely so heavy that next year’s harvest could be paltry.Pears in bloom

Some fruit trees are more prone than others to getting into a feast and famine cycle of a heavy crop one year and a light crop the next. My Macoun apple tree, although it bears delectable fruits, is the worst in this regard among the few apple varieties that I grow. Read more

asparagus seedlings

A CASE FOR ASPARAGUS

The Evidence

I’d like to make a case for growing asparagus, even if you’re not a vegetable gardener. In fact, vegetable gardeners need not relegate asparagus to the vegetable patch. The plants hold little interest to deer, rabbits and other furry invaders that must be fenced out of vegetable gardens.

The ferny stems can provide a wispy lime-green backdrop to mounded flowers like lavatera and gaillardia, or an airy foreground to the broad, glossy leaves of holly bushes. My present asparagus provides a backdrop for three clematis plants trained skyward on wire trellises.Asparagus and clematis

Asparagus is especially easy to grow, in part because it is a perennial. My patch is about 25 years old. Read more

Espalier in Normandy, France

FORM & FUNCTION MEET WITH ESPALIER

Espalier Goals

Espalier (es-pal-YAY) is the training of a plant, usually a fruit plant, to an orderly, two-dimensional form. The word is derived from the Old French aspau, meaning a prop, and most espaliers must, in fact, be propped up with stakes or wires. This method of training and pruning plants had its formal beginnings in Europe in the 16th century, when fruit trees were trained on walls to take advantage of the strip of earth and extra warmth near those walls.

Espalier in Normandy, France

Espalier in Normandy, France

Why go to all the trouble of erecting a trellis and then having to pinch and snip a tree frequently to keep it in shape? Because a well-grown espalier represents a happy commingling of art and science, resulting in a plant that pleases eyes and, if a fruit plant, also palates. You apply this science artfully (or your art scientifically) with manipulations such as pulling exuberant stems downward to slow their growth, by cutting notches where stems threaten to remain bare, and by pruning back stems in summer to keep growth neat and fruitful.  Read more

Slitting bark of rootstock

HENRY THE EIGHTH OF HORTICULTURE

How to “Make” a New Tree

Visitors to my garden this time of year are often astonished to see me lopping the tops off some of my trees. No, I’m not the Henry the Eighth of horticulture, chopping the head off any tree that no longer meets my fancy. Okay, I AM actually lopping the head off any tree that doesn’t meet my fancy.

I part ways with Ol’ Henry, though, because, first, lopping the head off a tree doesn’t kill it and, second, I graft on a new head. (Something Henry could not do.) A few years after this seemingly brutal operation, the tree looks as chipper as ever. And it has a head that I like better — or else off it comes again.Inserting scions for bark graft

I do this type of grafting, called topworking, mostly on my pear trees, but it could equally be applied to many other kinds of fruit or ornamental trees. Read more

Tulips in a vase

DEER FOOD

Big Bulbs Uneaten

Chomping down on a rosette of freshly emerging tulip leaves is just the thing to drive away winter’s doldrums — for a deer. Tulips in a vaseCrocuses probably taste almost as good to these creatures. There’s no need, though, for you or me to forsake the blossoms of spring bulbs; plenty of plants don’t appeal to deer palates. Read more

Rhizoctonia damping off

DAMN-PING OFF

Worse than Roman Warriors

I made my first gardening enemies decades ago, within a few weeks of starting my first garden. Not other gardeners but — and perhaps you also have crossed paths with them — with Pythium, Rhizoctonia, and Fusarium. I quickly learned that they were, or should be, hateful not only to me but to all gardeners.

Pythium, Rhizoctonia, and Fusarium are not ancient Roman warriors; they are fungi and, worse than Roman warriors, they lurk everywhere. When they, or one of them, gets the upper hand they cause damping off disease.Beet seedling damping off

Let’s return to my first garden: At the time, decades ago, I was living in a relatively dark apartment, a converted motel room, and was eager to start my first seedlings. I sowed all sorts of seeds in peat pots, stood them in a little water, then crowded them together on all the shelf space that could be mustered.

Young sprouts never appeared in some of the pots. In others, seedlings emerged, then toppled over, their “ankles” reduced to a withered string of rotted cells unable to support the small plants physically or physiologically. Read more

Cats with potted begonias

IS REAL SOIL GOING TO POT?

What’s in Your Mix?

That potting soil that you’ve bought for your seedlings and houseplants? It probably has no REAL soil at all in it. Real soil is just too hard to obtain in reliable and uniform quantities for commercial packaging. Soilless mixes, as commercial potting soils are (or should be) called, are a mix of some kind(s) of organic materials along with some aggregate, with possible additions of fertilizer, ground limestone, and a wetting agent.Cats with potted begonias

Organic materials in these mixes help sponge up water and cling to nutrients that might otherwise wash down and out of the pot. Peat moss is the organic material traditionally used in soilless mixes. Although it holds water well, it’s initially hard to wet, which is why wetting agents are sometimes added to soilless mixes. Read more

Persimmons (not growing) on a branch

HAVE YOUR “CAKE” AND EAT IT, TOO

Take a Moment for Forethought

Luscious photos now splash pages of mail-order catalogs, the web, and plant tags at local nurseries. It’s hard to remain rational about planting this time of year, and more so the colder the last winter’s climate.

What I’m suggesting is to give plantings some forethought and, rather than looking for either ornamental or edible trees and shrubs, considering plants that fulfill both functions. That is, trees and shrubs that earn their keep year-‘round with leaves that remain lush and verdant all summer, then light up with fall color, and, of course, bear fruit, and perhaps unfold with eye-catching blossoms in spring.

Persimmons ripening

Persimmons ripening

Lots of trees and shrubs fill this bill, but here I’d like to restrict consideration to fruits that I would pop into my mouth right out in the garden; doctoring up as jam or in a pie is not obligatory.  Read more