The winter garden
The garden is asleep. The planning isn’t.
Zone 6B · Hunterdon County, NJ
“As the days lengthen, the cold strengthens.”
- Persephone start
- November 20
- Persephone end
- January 20
- First indoor sow
- February 1 (onions & leeks)
- Seed orders by
- Mid-February at the latest
Everything you do in December, January, and February shows up in July. The July gardener depends on the winter gardener — the one who read last year’s notes, sketched the beds, ordered the seeds, sharpened the tools, and rested enough to want to start again in March. Winter isn’t a pause. It’s the shape of the year ahead.
The frame
Four things winter is for.
The winter garden isn’t about growing. It’s about what happens between growing seasons — the work that doesn’t show but decides everything.
Rest
The garden is asleep. You should be, too — sometimes.
Winter is a gift. Nine months of the year the garden asks something of you every day. In December, January, and February it asks almost nothing. Take that seriously — the exhausted July gardener who never rested is the same gardener who quits in August. The garden will need everything you have again in March.
Plan
Sketch on paper what April will build in the beds.
Winter is when you review last year's notes, redraw the beds, decide which crops rotate where, and pick this year's experiments. Do it now, on paper, in the kitchen with coffee. Doing this in April, on your knees in the mud, is how spring becomes chaos.
Order
Seeds, bulbs, live plants — all before mid-February.
The best varieties from the best catalogs sell out first. Order everything by mid-February. That includes seed potatoes, garlic (if you didn't plant in October), asparagus crowns, strawberry plants, and bare-root fruit trees for spring delivery.
Protect
The garlic, the perennials, the fruit trees, the tools.
What's in the ground needs mulch through the coldest weeks. Trees need protection from voles and rabbits. Tools need to be cleaned and oiled so they're ready in March. Cold frames and low tunnels need weekly attention — vent on sunny days, harvest on mild days, don't disturb frozen leaves.
The workflow
Planning, step by step.
Six steps between the first cold week and the first seed under the lights. Doing them in order — and doing them now, instead of in April — is the difference between a planned garden and a chaotic one.
- 01
Read last year's notes
First week of December
What produced heavily? What failed? Which varieties disappointed? Which held up? Circle the notes you'll act on. If you didn't take notes, this is the year to start.
- 02
Sketch the bed map
December through early January
Draw the beds on paper (or use last year's map). Move tomatoes to a bed that didn't have nightshades. Move brassicas to a bed that grew legumes. A simple 3- or 4-year rotation prevents most soil disease.
- 03
Take stock of saved seeds
Early January
Pull the seed box and check what you have. Anything three-plus years old — test-germinate 10 seeds on a wet paper towel; if fewer than 6 sprout in a week, buy fresh. Toss what's clearly dead.
- 04
Draft the seed order
January
Pull from multiple catalogs. Split the order by what each catalog does best. Add 20% more than you think you need — bad germination, animal loss, and 'plant more of that' happen every year.
- 05
Order by mid-February
February 1–15
The good varieties disappear. Seed potatoes and onions arrive in stores briefly and then vanish. Order live plants (asparagus, strawberries, bare-root trees) at the same time — they ship in April but reserved slots go first.
- 06
Set up the indoor seed-starting station
Late January
Onions and leeks go in on Feb 1. That means the shelf, lights, heat mat, trays, and seed-starting mix all need to be ready. Find the broken timer now, not on Feb 1.
Where the seed comes from
The catalogs.
Every catalog has strengths. Order from three or four rather than one — each does something the others don’t. Free to request; arrive December through February; read them like magazines.
Baker Creek Heirloom Seeds
Rare heirlooms, global varieties, stunning catalog
The single most comprehensive heirloom catalog in the country. Coffee-table quality. Best for tomatoes, peppers, unusual squash, and flowers you've never heard of. Not everything germinates like a commercial hybrid — expect variability.
Fedco Seeds
Cold-climate crops, cooperative pricing, well-vetted varieties
A Maine cooperative that trials everything in the Northeast climate. If a Fedco variety made the catalog, it works in NJ 6B. Excellent for cold-hardy greens, potatoes, and short-season varieties. Order early — they close for the season.
Johnny's Selected Seeds
Trial-tested, market-grower quality, superb tools
The professional grower's catalog. Every variety has performance data. Best for reliable production varieties, hybrid tomatoes, salad greens, and the tools that make everything easier (paper-pot transplanter, wire hoops, row cover).
Southern Exposure Seed Exchange
Southeastern heirlooms, seed-saving support
A Virginia cooperative preserving Southern heirlooms. Excellent for heat-tolerant varieties, Southern peas, sweet potato slips, and the kind of collards your grandmother grew.
Territorial Seed Company
Pacific Northwest breeding, cool-climate strengths
Bred for the maritime Northwest, which means many of their varieties handle NJ 6B's cool springs and falls beautifully. Excellent for brassicas, alliums, and cool-season greens.
What’s still coming out of the garden
The winter salad garden.
If you planted in September under row cover or a low tunnel, you’re not dependent on the grocery store for greens. Realistic yields, and how each one holds:
Mâche (corn salad)
Planted: Sown September; under row cover or low tunnel November onward
Yield: Small tender rosettes; cut with scissors, plant regrows
Spinach ('Winter Bloomsdale')
Planted: Sown September; heavily mulched, under cover
Yield: Harvest outer leaves through December, dormant through Persephone, resumes in March for a jumpstart spring cut
Kale ('Winterbor')
Planted: Sown in July for fall; keeps standing through winter under cover
Yield: Sweeter after every freeze; harvest older leaves as needed
Tatsoi & tatsoi-mizuna mix
Planted: Sown late August into September; cold-frame or low tunnel
Yield: Small dark rosettes; cut-and-come-again through most of winter
Claytonia (miner's lettuce)
Planted: Sown September into October; extraordinarily cold-hardy
Yield: Round succulent leaves; self-seeds and returns yearly if left alone
Root crops under straw
Planted: Sown summer; blanket with 8–10 inches of straw before hard freeze
Yield: Carrots, parsnips, leeks stay sweet in the ground — dig as needed through December, sometimes into January
Garlic (dormant, growing)
Planted: Planted October; overwinters
Yield: You're not harvesting garlic in winter — but you're checking the mulch stays put and the shoots emerge in March
Managing the season-extension setup
Cold-frame& low-tunnel rules.
The extension setup buys you months of harvest — but only if you tend it. Five rules that keep the greens alive:
01Vent cold frames and low tunnels on any sunny day above 40°F
Under clear plastic in full sun, temperatures inside can hit 80°F even in January. Overheating cooks the greens as fast as frost does. Prop open on sunny days; close before sundown.
02Don't disturb frozen leaves
Frozen kale, spinach, and mâche are brittle — touch them and they snap. Wait for the leaves to thaw (usually by mid-morning on any day above freezing) before harvesting. They're fine once thawed.
03Harvest on mild days, not before storms
Anything you cut recovers slowly in winter. Cut what you'll eat this week. Leave the rest until the next mild spell.
04Water sparingly if at all
Cold soil holds moisture longer. Overwatering in winter causes root rot; the plants are barely transpiring. Water only if the top inch of soil is dry, and only on mild days above 40°F.
05Refresh mulch after any warm spell
Freeze-thaw cycles pull mulch apart. Every few weeks, walk the beds and re-tuck the straw over garlic, root crops, and strawberry crowns.
The workshop
Tool maintenance.
A sharp hoe cuts weeds; a dull one hacks at them. Every tool deserves an afternoon this winter — the March gardener will be grateful for a mower that starts on the first pull and pruners that don’t crush the stem.
Hoes, spades, shovels, trowels
Clean, sharpen, oil
Wire-brush off caked soil. Sharpen the working edge with a mill file (draw the file at ~20° along the bevel; 10–15 strokes per side). Rub the metal with an oil-soaked rag (linseed or mineral oil). Sand wooden handles with 220-grit and rub with linseed oil.
Pruners (hand, loppers)
Clean sap, sharpen, oil
Wipe blades with rubbing alcohol to dissolve sap. Sharpen the beveled edge with a fine diamond file. Oil the pivot point (WD-40 or 3-in-1). If blades wobble, tighten the pivot bolt.
Mower, tiller, string trimmer
Drain fuel, change oil, sharpen
Drain the fuel tank or add stabilizer and run the engine dry (ethanol fuel absorbs water and gums up carburetors over winter). Change oil if it's been a season. Sharpen mower blade. Air filter check.
Row cover, low-tunnel plastic
Repair, roll, store dry
Patch holes in row cover with duct tape or sew with a heavy needle. Roll clean and dry; store in a shed away from rodents (they nest in fabric). Plastic should be rolled loosely to prevent creasing.
Seed-starting equipment
Sanitize trays, check lights, test heat mat
10% bleach dip on plastic trays for 10 minutes; rinse and air dry. Wipe light fixtures. Plug in the heat mat and confirm it warms up. Order any new bulbs by mid-January.
The two-month exhale
The Persephone reality.
Between November 20 and January 20, day length in Hunterdon County falls below ten hours. Nothing grows. Plants hold at whatever size they reached in November; roots don’t put on mass; even the winter greens under cover slow to a stop. You can’t work around this — the sun isn’t available.
The gift is that neither can the weeds. This is the only window in the year where the garden truly rests. Use it. Read a book about gardens instead of gardening in one. The season starts back up on January 20, and by February 1 you’re back under the lights with onion seed.
What’s next
Put it into practice.
The monthly almanac is where winter’s specific work lands — the December mulch, the January review, the February seed-starting.
Back to the almanac.