Salsify

Salsify is sometimes called the oyster plant, which sets expectations the vegetable rarely meets. The flavor is mild and slightly earthy, with a hint of something that might remind you of oysters if you squint — but mostly it tastes like a delicate root vegetable with a texture somewhere between parsnip and artichoke heart. The real challenge is not the flavor; it is the growing season. Salsify wants 120 to 150 days in the ground, and it wants soil prepared to a depth most gardeners do not bother with.

This is a taproot crop, which means transplanting is not an option. Salsify must be direct-sown where it will grow, and the soil needs to be loose and stone-free to at least twelve inches down. A rock, a clod of clay, or a layer of hardpan will cause the root to fork or twist, and a forked salsify root is nearly impossible to peel and prepare. If your garden soil is heavy or rocky, a raised bed filled with a sandy loam mix is the only practical approach.

Sow seeds about four weeks before your last frost date, when the soil is still cool but workable. The seeds germinate slowly — expect two to three weeks — and the seedlings grow at a pace that can feel glacial through late spring and early summer. Thin to about four inches apart once the plants are established. Crowding produces thin, stringy roots that are not worth harvesting.

Watering needs to be consistent but moderate. Salsify handles dry spells better than sudden swings from drought to flood, which can cause the roots to crack or develop hollow centers. Mulching helps keep the soil moisture even, and it also suppresses weeds — which matter, because hand-weeding around salsify's delicate foliage tends to disturb the roots.

The roots are ready to harvest after the first fall frost, but many gardeners find that leaving them in the ground over winter improves the flavor noticeably. The cold converts some of the starches to sugars, and a root dug in early spring — before the plant re-sprouts — is often sweeter and more tender than one harvested in November. Mark the row clearly in the fall so you can find it again when the snow melts.

If you let a plant bolt in its second year, the flower is a striking purple thistle-like bloom that bees favor. The seedheads look like oversized dandelion puffs and are mildly ornamental, though they will self-sow aggressively if left to ripen.