Most herbs don't thrive on winter windowsills. Two do.

Windowsill herb plants would seem the perfect antidote to winter's visual and culinary blandness

Gardening Windowsill Herbs (Lee Reich)

Windowsill herb plants would seem a perfect antidote to winter's visual and culinary blandness, except that such plants rarely do as well as billed.

The ideal windowsill herb thrives despite dry air and relatively low light conditions to offer intense aroma and flavor. And it should be a pretty plant in winter.

Those criteria rule out mint, which is too gangly; basil, which wanes in anything less than summer’s heat and light; and chives, which are too mild, with just one picking decimating the plant.

TWO MEDITERRANEAN HERBS

Two herbs do fit the bill for intense aroma and flavor, and beauty. They are... (drum roll)... rosemary (Salvia rosmarinus) and bay laurel (Laurus nobilis).

Both are Mediterranean plants that thrive where winters are cool but never frigid. A sunny window in a cool room is ideal, but both will do fine under less than ideal conditions.

For rosemary, keeping the plant happy and alive means, above all, maintaining a moist soil. Check the soil regularly, because rosemary’s stiff leaves don’t wilt to show their thirst. Of course, you don’t want to drown the plant either, a condition best avoided with a potting mix containing a quarter or more, by volume, of perlite, vermiculite or sand.

The white, mealy coating on rosemary’s leaves gives the plant a grayish cast, as if it’s covered with dew. Perhaps this dewy look and the wild plants' proximity to the sea is what prompted the ancient Romans to call the plant Ros Marinus (“dew of the sea”), the origin of rosemary’s older generic name, Rosemarinus.

Even if rosemary were a homely plant, it would be worth growing for its scent, which it’s eager to release from resin glands on its stems and young leaves. Set a potted plant near a doorway or a rocking chair, where, with the pass of your hand, you can conveniently stir up a cloud of balsamic aroma into the air.

The taste of rosemary is potent, so only a small amount is needed for flavoring. When I need some, I just snip off a few sprigs, which also keeps my plant tidy and shapely.

Bay laurel, for its part, sports broad, dark, evergreen leaves, and a freshly picked leaf needs more coaxing than rosemary to give up its scent. But what a wonderful scent it is — much richer than what you’ll sniff from dried leaves out of a jar.

Cooked, its flavor readily infuses soups, tomato sauce, stews and other dishes. Freshly plucked, you’ll need to really crush a leaf to release its aroma.

REGULAR BUT MINIMAL CARE

Rosemary or bay laurel are attractive whether grown as informal shrubs or trained to the form of small trees. Pruning off all growth except for a single, vertical stem, then repeatedly pinching off the tip of that stem and any branches that develop creates a small tree out of either plant.

Such “standards,” as miniature trees are called, can be anywhere from 2 feet high on up, depending on the height at which you pinch out the initial, vertical stem. Over time, that stem will thicken to become a woody trunk. (Unpruned, bay laurel can grow to become a 50-foot-tall tree!)

With care and regular pruning, a potted bay laurel or rosemary plant can live for decades. Refresh the soil every couple of years by repotting the plant to a larger pot or slicing the root ball to reduce its size, then putting it back in the same pot with new potting soil in the space opened up.

For a treat (for your rosemary or bay laurel plant), move it outdoors in spring to bask in sunlight and fresh air for the summer. Your plants will appreciate it, and you’ll appreciate the plants for their beauty and the flavoring and aroma they offer, especially when you move them back indoors in late fall.

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Lee Reich writes regularly about gardening for The Associated Press. He has authored a number of books, including “Growing Figs in Cold Climates” and “The Pruning Book.” He blogs at http://www.leereich.com/blog. He can be reached at garden@leereich.com.