NO NEED TO PLANT SEEDS
In fact, good tarragon doesnâ€™t make any seeds at all. So donâ€™t plan on sowing seeds to get tarragon started in your own garden. Only Russian tarragon (A. dracunculoides), a kind of tarragon lacking in flavor, makes viable seeds from which it can be propagated.
The way to make new plants of the desirable French tarragon, besides just going out and buying them, is by cuttings or by division. Stem cuttings root fairly easily whether the stems are young and succulent or old and tough. Or take root cuttings in early spring just before growth begins, setting thick root pieces beneath a half-inch cover of soil, either in seed flats or out in the garden.
Early spring is also the time to multiply a tarragon plant by division. Dig up an established clump, and then cut it apart with a knife or your shovel blade into smaller pieces, each with roots attached, for replanting. Old plants like to be renewed this way every few years and replanted somewhere new.
For just one or two new plants, dig out some sprouts and attached roots from the edge of a clump, then replant them.
A FRIENDLY IMPOSTOR
To tide yourself over while waiting for your tarragon plantation to grow larger, you could plant an annual that has almost identical flavor. This plant (Tagetes lucida), called Mexican mint marigold, sweet mace or sweet scented marigold, can be grown from seeds.
The simple, yellow flowers look much like marigold because the plant is, in fact, a kind of marigold. Expect quick growth. Also expect the plant to return year after year as a perennial.
AND NOW, FOR THE REAL THING
Getting back to real tarragon: Although easy to grow, tarragon, like any other plant, has likes and dislikes.
Give it full sun and soil that drains well, even a soil that is a bit on the dry side. Wet soil spells death to tarragon in winter.
And speaking of winter, at its approach, cut tarragon stems to the ground, then cover the plant with some fluffy, organic material such as straw or oak leaves. Remove the covering in spring as growth begins.
Given water in summer and some protection from bitter cold in winter, tarragon also grows well in a pot.
Once your tarragon plantation comes into full production, thereâ€™s almost no end to this herbâ€™s uses. Pliny, writing in first century Rome, recommended tarragon against fatigue, and perhaps thatâ€™s why in Medieval times travelers slipped sprigs into their shoes before long journeys.
Vinegar takes on a tarragon flavor if poured hot over the herb, then sealed into bottles for two or three weeks. And tarragon is a perfect accompaniment to fish. Be careful, though, because in ancient Persia, tarragon was recommended for creating appetite.