Your Complete Spring Garden Checklist

Spring is the most exciting and most overwhelming season in the garden. There's an absurd amount to do in a compressed window of time, and the consequences of missing tasks (planting too late, not pruning at the right moment, forgetting to start seeds) compound through the entire growing season. A checklist takes the anxiety out of spring gardening and ensures nothing critical slips through the cracks.

This is my actual spring timeline, refined over fifteen years of gardening in Zone 6. If you're in a warmer zone, shift everything earlier by 2-3 weeks per zone. Colder zone? Shift later. The sequence stays the same — it's the calendar dates that slide.

8-10 Weeks Before Last Frost (Late January/February)

Start onion and leek seeds indoors under lights. These are the slowest-growing vegetables and need the earliest start. Order seeds and supplies for the season — popular varieties sell out fast. Inventory leftover seeds from last year (most remain viable for 2-4 years if stored cool and dry). Clean and sharpen pruning tools. Review last year's garden notes and plan this year's layout. Send a soil sample to your extension service for testing — results take 2-3 weeks, and you want them back before you start amending beds.

6-8 Weeks Before Last Frost (Late February/March)

Start tomatoes, peppers, and eggplant indoors under lights with a heat mat. Start broccoli, cabbage, cauliflower, and kale. Prune fruit trees and summer-flowering shrubs while still dormant. Turn your compost pile to jumpstart spring activity — add water if it's dry from winter. On the first warm-ish day, walk the garden and assess winter damage: note dead branches, heaved perennials, and any structural repairs needed.

Start hardening off cold-hardy seedlings (broccoli, kale, lettuce) by bringing them outside for a few hours on mild days. If soil is workable (not frozen or waterlogged), direct sow peas, spinach, and radishes — they prefer cool conditions and can handle light frost.

4-6 Weeks Before Last Frost (March/April)

Direct sow more cold-hardy crops: additional lettuce, carrots, beets, Swiss chard, and turnips. Plant seed potatoes (cut pieces with 2-3 eyes, plant 4 inches deep). Set out onion transplants or sets. Start succession planting of lettuce and radishes every 2 weeks.

Prepare garden beds: remove winter mulch from perennial beds (but not too early — wait until consistent 40°F+ days), spread compost or aged manure, gently work amendments into the top few inches. Install supports, trellises, and tomato cages NOW while beds are accessible. Apply corn gluten meal to paths and borders as a pre-emergent weed control (this also supplies nitrogen, so keep it off newly planted seeds).

Divide overgrown perennials (hostas, daylilies, ornamental grasses, asters). This is the ideal time — plants are just emerging and recover quickly from division. Pot up divisions for plant swaps or share with gardening friends.

2 Weeks Before to 2 Weeks After Last Frost (April/May)

Begin hardening off warm-season seedlings (tomatoes, peppers, squash, herbs). Start the hardening process 10-14 days before you plan to transplant — this step is critical and cannot be rushed.

After last frost (or when nighttime temps are reliably above 50°F): Transplant tomatoes, peppers, eggplant, basil, and other warm-season crops. Direct sow beans, corn, cucumbers, squash, and melons (these all want warm soil and can't be rushed). Plant dahlia tubers.

Mulch everything with 2-3 inches of organic mulch. Set up drip irrigation or soaker hoses. Apply fish emulsion or liquid kelp as a gentle first feeding for transplants. Hang hummingbird feeders. Plant annual flowers (zinnias, cosmos, marigolds, sunflowers).

And then: sit back (briefly), survey your work, and enjoy the fact that you got it all done. The hardest work of the gardening year is behind you. From here, it's maintenance, harvesting, and enjoyment. You earned it.