What to Plant in January — Winter & Early Spring Garden Guide by Zone 2026

What to plant in January by USDA hardiness zone

Zones 5–6 — The indoor garden season begins

In Zones 5-6, January outdoor gardening is limited to harvesting cold-hardy crops from cold frames and keeping garlic beds mulched. But the indoor growing operation is where the action is — and starting now makes a significant difference in summer harvests.

• Start onion and leek seeds now (highest priority): Onions need 10-14 weeks from seed to transplant size. Starting in January puts them ready for April-May outdoor planting. Sow in a 1020 flat with seed starting mix, 1/4 inch deep, 30-40 seeds per flat. Keep soil at 60-65°F (no heat mat needed — cool temperatures are fine for onion germination). Grow lights 14-16 hours/day, 2-4 inches above seedlings.
• Order seeds immediately: The best heirloom tomato, specialty pepper, and unique squash varieties sell out by February. Order from trusted seed companies now. Make your crop rotation plan while building the list.
• Cold frame and row cover harvest: Continue harvesting mâche, kale, spinach, and claytonia from cold frames throughout January. These crops grow slowly but are available fresh when everything else is dormant.
• Prune fruit trees: January (when trees are dormant) is ideal for pruning apples, pears, plums, and cherries. Make clean cuts, don't paint wounds (contrary to old advice), and remove crossing, crowded, or downward-growing branches.

Zones 7–8 — Transition from winter to early spring

January in Zone 7-8 (Mid-Atlantic, Pacific Northwest, Upper South) varies from cold and frozen (Zone 7 inland) to cool and rainy (Zone 8 Pacific Northwest). The outdoor garden is in its final winter chapter, while the indoor operation ramps up.

• Start onions and leeks indoors: Same priority as Zone 5-6 — January starts produce the strongest bulbs. Zone 8 can also start shallots from seed in January for summer harvest.
• Start cool-season transplants (Zone 8, late January): Broccoli, cabbage, and kale transplants started in late January can go out under row cover in mid-March in Zone 8. These are 6-8 week crops from seed to transplant.
• Continue cold frame harvest: Mâche, claytonia, spinach, kale, and arugula continue producing in cold frames. January often provides the most reliable cold frame harvests because the days are getting longer even if temperatures remain cold.
• Overwintering onion sets: If you planted overwintering onion sets in November, check on them and make sure they're not heaving out of the ground from freeze-thaw cycles. Push them back in if needed and add more mulch.

Zones 9–11 — Peak cool-season production

January is one of the three best gardening months of the year in warm-winter zones. Temperatures of 55-70°F daytime and no frost make this ideal for virtually every cool-season vegetable. The fall garden planted in October-November is now in full production.

• In full harvest: Broccoli, cauliflower, cabbage, lettuce, peas, spinach, chard, beets, carrots, turnips, leeks, and kale. This is the salad season in Zone 9-11.
• Keep planting for succession harvests: Direct sow lettuce, spinach, arugula, and Asian greens every 2-3 weeks for continuous harvest. Transplant broccoli and cauliflower for a second wave of harvest in March-April.
• Start tomatoes and peppers indoors (Zone 10-11): Zone 10-11 gardeners can start tomato seeds indoors in late January for March-April transplanting. Zone 9 should wait until February-March.
• Peas: Peas planted in October-November are now producing pods. Keep them picked to extend harvest. If you didn't plant in fall, you can still plant in January in Zone 9-11 for April-May harvest.

January planting calendar by USDA zone

January seed starting: the onion and leek system

Onions and leeks are the most time-sensitive seed starts of the entire year. Sown in January, they'll be transplant-ready in April when outdoor conditions are perfect. Delay to March and you'll plant out undersized seedlings that produce small bulbs.

Equipment for January onion starts

• Seed starting mix: Fine-textured, sterile mix. Onion seeds are tiny and need good seed-to-soil contact. Avoid potting soil — too coarse for onion germination.
• Shallow tray or flat: A 1020 tray (standard seed flat) holds 300+ onion seeds and is the most efficient container. Alternatively use plug trays with 50-72 cells.
• Grow lights (critical): Onion seedlings are notorious for flopping over without sufficient light. Place grow lights 2 inches above seedling tips. Without adequate light, you'll get long, floppy seedlings that never recover.
• Fan: Run a small fan for 1-2 hours daily to strengthen stems and improve air circulation. This prevents damping-off, which is more common in onions than most other crops.

Trimming onion seedlings

When onion seedlings reach 3-4 inches, trim them back to 2 inches with scissors. This is counterintuitive but produces much stronger, bushier seedlings. Repeat the trim every 2-3 weeks. Trimmed seedlings that look stubby in February will be stocky, strong transplants in April with robust root systems.

January garden planning: the tasks that pay dividends all year

• Crop rotation plan: Map your beds and plan which family goes where. The main rule: don't plant the same botanical family in the same spot two years running. Rotate nightshades (tomatoes/peppers/eggplant), brassicas (broccoli/cabbage/kale), alliums (onion/garlic/leeks), and legumes (beans/peas) around the garden each year.
• Order seeds from specialty sources: Big-box store seed racks in March rarely have the best varieties. Order from seed companies like Baker Creek, Johnny's Selected Seeds, or Fedco for genuine variety selection — but do it now, in January, before their best sellers run out.
• Soil amendment: Spread compost or aged manure on empty beds now. Winter rain and freeze-thaw cycles integrate the organic matter into the soil by spring, creating a much better planting bed than fresh spring applications.
• Tool maintenance: Sharpen hoe blades, spade edges, and pruner blades. A sharp hoe cuts weeds in one pass instead of three. Clean and oil pruners to prevent rust. Handles that have dried out can be sanded and treated with linseed oil.

Frequently asked questions about what to plant in January