What to Plant in January in Zone 7

Roots and Alliums, Nothing Else

Most of the garden stays shut in January here, but not entirely. Onion sets, leeks, and parsnip all go straight into outdoor ground this early, each one able to sit through a hard freeze without flinching. That is the real test for an outdoor January planting in this zone: will it shrug off a night in the low 20s. Those three pass it, and nothing else goes into open ground until next month.

Celeriac follows a different path this month. It starts indoors under lights rather than heading outside, because a celeriac seedling that spends more than a week with the bench reading below 55 degrees takes that stretch as its winter and bolts once spring warmth arrives, sending up a seed stalk instead of filling out the root. Keep it somewhere the heat stays steady, not just above freezing, until Zone 7's own transplant window opens next month.

Zone 7 still gets a real winter. Overnight lows in the teens are common between now and the middle of February, and a bare bed of young greens will collapse to mush after one bad night. That is why the list this month runs to cold-hardy roots and alliums first, tender leafy stuff second. Parsnip in particular can sit frozen solid for weeks and finish sweetening once it thaws.

If you started onion seed indoors back in November, use this month to check germination before committing tray space to a second round. Spread 10 seeds on a damp paper towel, fold it in a bag, and count how many sprout after 8 days. Anything under 7 out of 10 means buy fresh seed rather than gamble the spring on a weak packet.

The Work That Isn't Planting

Sharpen and oil every blade before February's rush hits. A hoe or pruner that has sat idle since November usually carries a fine layer of rust; a few strokes with a flat file along the bevel restores a working edge in under five minutes per tool.

Chit seed potatoes now if you're aiming for a late February or March planting. Set them eyes-up in a shallow tray somewhere that gets indirect light and stays around 50 degrees. In three to four weeks you want thick, stubby sprouts, not the pale thread that grows in a dark cabinet.

Walk any bed carrying overwintered greens at least once a week, and pull back a corner of row cover on sunny afternoons above 45 degrees. Trapped moisture under cover causes more rot in January than the cold itself ever does.