Seasonal Framework for High-Density Market Gardens
Anchored to your Last Frost Date (LFD) and First Frost Date (FFD), this framework scales to any hardiness zone while emphasizing the soil-building principles of high-intensity and regenerative gardening.
1. Late Winter / Early Spring (Prep & Indoor Sowing)
Timing: 12 to 4 Weeks Before LFD
Establishing the structural foundation of the garden and getting a head start on long-season crops.
Planning & Infrastructure
Map the Grids: Finalize the Square Foot Garden (SFG) crop rotation map, ensuring heavy feeders do not follow other heavy feeders from the nightshade family.
Repair Hardscaping: Fix raised bed perimeters, tighten trellis wires, and replace any deteriorated SFG grid dividers.
Procure Amendments: Stockpile high-quality compost, worm castings, and slow-release organic fertilizers (e.g., 4-4-4, bone meal, blood meal).
Seed Starting & Prep
10–12 Weeks: Sow alliums and slow-growing herbs.
8–10 Weeks: Sow peppers and eggplants.
6–8 Weeks: Sow tomatoes. Sow early spring brassicas.
Soil Prep: Broadfork to aerate, top-dress with 1–2" compost, and pre-warm soil with tarps if needed.
2. Spring (Cool-Weather Planting & Transition)
Timing: 4 Weeks Before LFD to 2 Weeks After LFD
The garden wakes up. This season requires aggressive succession planning to maximize yield in high-density spaces.
Planting & Hardening
4–6 Weeks Before: Direct sow peas (requires immediate trellising) into soil reaching at least 45°F.
4 Weeks Before: Begin hardening off cold-hardy seedlings. Direct sow root crops and hardy greens.
3–4 Weeks Before: Direct sow Swiss chard.
2–3 Weeks Before: Transplant brassicas/alliums. Water with diluted kelp or fish emulsion to reduce transplant shock.
Maintenance & Succession
Succession Sowing: Begin sowing fast-maturing crops (radishes, baby lettuce) every 10–14 days in newly opened squares.
Weed Management: Cultivate the top inch of soil weekly; weeds in high-density beds compete fiercely for water/nutrients.
3. Early to Mid-Summer (Warm-Weather Peak)
Timing: 2 to 8 Weeks After LFD
Frost danger has passed. Focus shifts to vertical growth, heavy feeding, and maximizing spatial efficiency through companion planting.
Warm-Weather Planting
0–2 Weeks After LFD: Direct sow warm-soil seeds (beans, squash, cucumbers, zucchini).
1–3 Weeks After LFD: Transplant hardened-off nightshades.
2–3 Weeks After LFD: Transplant melons once soil temperature consistently reaches 65°F or above.
Interplanting: Utilize space under climbing crops (like trellised cucumbers) to grow shade-tolerant greens or radishes.
Note on Parsnips: If planning a fall parsnip harvest, direct sow parsnips now — 14–16 weeks before your FFD — as they require 100–120 days to mature.
High-Intensity Maintenance
Vertical Training: Prune indeterminate tomatoes to 1–2 main leaders; guide pole beans and cucumbers up netting.
Feeding & Mulching: Side-dress heavy feeders. Apply 1–2 inches of organic mulch to regulate soil temp and retain moisture.
Mid-Summer Sowing: Transition to heat-tolerant greens. Start fall brassicas indoors 6–8 weeks before FFD.
4. Late Summer to Fall (Transition & Extension)
Timing: 8 Weeks Before FFD to FFD
As summer crops exhaust themselves, pull them aggressively to make way for the autumn harvest.
Bed Turnover & Planting
Clear & Replenish: Cut spent summer crops at the soil line (leave roots to preserve organic matter). Top-dress with 1 inch of compost.
10–12 Weeks Before FFD: Direct sow fall carrots to allow the 50–75 days needed for full maturity before hard frost.
8–10 Weeks Before FFD: Direct sow fall beets (50–70 days to maturity).
8 Weeks Before FFD: Transplant fall brassicas.
4 Weeks Before FFD: Direct sow fast-maturing, frost-tolerant greens.
Season Extension
Infrastructure: Erect low tunnels or prepare heavy-weight row covers over beds containing tender late-season crops.
Pest Scouting: Monitor for late-season aphids or cabbage worms; treat with organic soap or Bt as needed.
5. Over-Winter (Rest & Soil Building)
Timing: After First Frost Date (FFD) through Deep Winter
A regenerative garden's winter is dedicated to protecting the soil microbiome and preparing the nutrient bank for the following spring.