New York spans four significant climate zones for vegetable gardening: zone 5b in the Adirondacks and Northern Tier, zone 6a–6b in the Finger Lakes and mid-Hudson Valley, zone 6b–7a in the Lower Hudson Valley and Capital Region, and zone 7a–7b on Long Island and New York City.
I garden in Melville, Long Island (zone 7a). My average last frost is April 15 and first fall frost is October 15 — giving me approximately a 183-day growing season. Gardeners in zone 5b near Buffalo or Plattsburgh have average last frost dates of May 10–15 and first fall frost in late September — a 120–130-day season. These are different gardens requiring different calendars.
Per Cornell Cooperative Extension, the frost dates for specific New York locations are available through the Cornell Climate Smart Farming tool, which uses weather station data to give location-specific averages rather than regional approximations.
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Reference Last Frost Dates (Average 50% Probability)
Per Cornell Cooperative Extension:
| Region | Last Spring Frost | First Fall Frost | Season |
|---|---|---|---|
| Long Island / NYC (zone 7a) | April 10–15 | October 15–20 | ~190 days |
| Lower Hudson Valley (zone 6b) | April 20–25 | October 5–10 | ~165 days |
| Mid-Hudson / Capital Region (zone 6a) | May 1–10 | September 25–30 | ~145 days |
| Finger Lakes / Western NY (zone 6a) | May 5–15 | September 25 | ~135 days |
| Adirondacks / N. Tier (zone 5a–5b) | May 15–25 | September 10–20 | ~110–120 days |
Long Island and NYC (Zone 7a) Planting Calendar
February–March: Indoor Starts
Per Cornell Cooperative Extension, Long Island gardeners can start:
- Onion seeds indoors: 12–14 weeks before last frost (January–February)
- Peppers indoors: 10–12 weeks before last frost (early February)
- Tomatoes indoors: 6–8 weeks before last frost (late February to early March)
- Eggplant: 10–12 weeks before last frost
March–April: Cool-Season Direct Sow and Transplants
Per Cornell Cooperative Extension, for zone 7a Long Island:
- Direct sow outdoors: Peas (April 1), spinach (March 15–April 1), arugula (March 15), radish (March 15–April 1), lettuce (March 25–April 10), kale (March 25)
- Transplant outdoors (after April 1, soil 45°F+): Broccoli, cabbage, cauliflower transplants started indoors 4–6 weeks earlier
May: Warm-Season Transition
- May 1–15: Harden off tomato and pepper transplants; transplant to cold frame if available
- May 10–20: Direct sow beans, corn, beets, carrots, summer squash, cucumbers when soil reaches 60°F (typically May 10–15 on Long Island)
- After May 15–20 (when nighttime temps reliably above 50°F): Transplant tomatoes, peppers, eggplant outdoors
- Late May: Direct sow basil outdoors when soil is above 65°F
June–August: Summer Maintenance Plantings
Per Cornell Cooperative Extension:
- June 1–15: Succession-sow beans every 2 weeks; plant sweet potato slips (soil minimum 65°F)
- Late June: Second planting of summer squash if powdery mildew has affected the first; additional cucumber succession
- July 15–August 1: Start broccoli, cabbage, kale transplants indoors for fall planting
- August 1–15: Side-dress tomatoes and peppers with 1 tablespoon of 10-10-10 per plant; this is when the second flush of fruit is setting and the plants need consistent nutrition
In zone 7a on Long Island, June is also the month to watch for squash vine borer (peak adult flight mid-June through July) and to begin scouting tomatoes for early blight and septoria leaf spot. Per Cornell Cooperative Extension, removing lower leaves showing disease symptoms and mulching the soil surface reduces splash dispersal significantly.
August–September: Fall Plantings
Per Cornell Cooperative Extension, Long Island's long fall season makes it one of the best regions in the Northeast for fall vegetable production:
- August 1–15: Transplant fall broccoli, cabbage, kohlrabi outdoors
- August 1–15: Direct sow fall carrots, beets, turnips
- August 15–September 1: Direct sow kale, spinach, arugula, lettuce for fall harvest
- September 1–15: Plant garlic cloves for overwintering (harvest July)
Hudson Valley / Mid-NY (Zone 6a) Calendar Adjustments
Per Cornell Cooperative Extension, zone 6a gardeners should:
- Shift all spring outdoor planting 2–3 weeks later than Long Island
- Start indoor seeds 2–3 weeks earlier to compensate
- Do not transplant warm-season crops until after May 20–25
- Begin fall plantings 1 week earlier (July 15 for fall transplants)
Zone 5b (Finger Lakes, Western NY) Calendar Adjustments
Per Cornell Cooperative Extension, zone 5b gardeners should:
- Start tomatoes and peppers indoors in early February (10–12 weeks before May 15 last frost)
- Do not transplant tender crops until after June 1
- Select short-season tomato varieties (under 70 days from transplant) to ensure maturity before September frost
- Focus on cold-hardy crops (kale, carrots, beets, celeriac) that tolerate zone 5b's early fall frosts
Variety Selection for Short-Season NY Growers
Per Cornell Cooperative Extension, short-season vegetable varieties for northern New York:
| Crop | Short-Season Variety | Days to Maturity |
|---|---|---|
| Tomato | 'Siletz', 'Early Girl', 'Stupice' | 52–65 days |
| Pepper | 'Ace', 'Jingle Bells' | 55–65 days |
| Corn | 'Earlivee', 'Northern Xtra Sweet' | 63–68 days |
| Cucumbers | 'Fanfare', 'Spacemaster' | 52–60 days |
| Winter squash | 'Delicata', 'Sweet Dumpling' | 80–85 days |
| Melon | 'Earlisweet', 'Fastbreak' | 65–70 days |
Frequently Asked Questions
When should I plant garlic in New York? Per Cornell Cooperative Extension, garlic is planted in fall in New York, ideally 4–6 weeks before the ground freezes (September 15–October 15 on Long Island; September 1–October 1 in zones 5–6). The cloves establish roots in fall, remain dormant through winter, and produce a July harvest. Hardneck varieties (Rocambole, Porcelain, Purple Stripe types) are best suited to New York's climate.
What are the most common New York vegetable frost damage mistakes? Per Cornell Cooperative Extension, the two most common mistakes are: (1) planting tomatoes and peppers outdoors too early (before soil reaches 60°F and nights are above 50°F — often before May 15 in most of NY), and (2) not planning fall plantings early enough. Fall broccoli started too late (after August 15 in zone 6) will not mature before heavy frost.
How do I know when my soil is ready to plant in spring? Per Cornell Cooperative Extension, use a a soil thermometer to check temperature at 4-inch depth — not air temperature. Cool-season crops can be planted when soil reaches 40–45°F. Warm-season crops need 60°F at 4-inch depth. Planting when soil is too cold results in slow germination, rotted seeds, and transplant stress.
What I'd do differently
I've been gardening on Long Island (Melville, zone 7a) for years, and the single most valuable calendar adjustment I've made is the fall planting schedule. Most Long Island gardeners stop planting in June and write off the season after Labor Day. The Cornell Extension calendar shows this is wrong. An August 15 kale transplant will produce well into November and through light frosts; a September 1 spinach direct sow can yield into December in a normal year.
For zones 5b and 6a gardeners in northern New York: the short-season variety table above is not optional. I've watched gardeners in the Finger Lakes region try 'Brandywine' tomatoes (80+ days) and harvest green tomatoes in September every year. 'Stupice' at 52 days is a completely different outcome. Variety selection matters more in short-season climates than it does at my Long Island location.
Sources
- Cornell Cooperative Extension — Vegetable Planting Calendar
- Cornell Cooperative Extension — Home Gardening in New York