The growing season

The city is warmer than the countryside around it, and the season is longer than most planting charts assume.

New York City sits in USDA hardiness zone 7, with the warmer parts of the city — dense Manhattan and Brooklyn — running warmer still. The urban heat island is not a small effect: it can add a couple of weeks at each end of the season compared with the suburbs an hour away.

Frost dates

The last spring frost typically falls in early-to-mid April, and the first autumn frost in late October into November. That is a long season by North American standards — roughly six and a half to seven months.

Use these as planning figures, not guarantees. A late cold snap in April happens often enough that hardening off and covering are worth the trouble.

Rough calendar

February–March — start seeds indoors for tomatoes, peppers, aubergines. Sow cold-hardy crops outdoors under cover: peas, spinach, radish, lettuce.

April — the main cool-season planting. Brassicas, chard, carrots, beets, more greens. Potatoes go in. Do not put tomatoes out yet, however warm it feels.

May — after the frost risk passes, the warm-season crops: tomatoes, peppers, cucumbers, squash, beans, basil. This is the busiest month.

June–August — maintenance, watering and succession sowing. Beans and greens can be resown through this period for a continuous crop.

Late July–August — sow the autumn crop. Brassicas, carrots, beets and greens planted now mature into the cool weather, and many taste better for it.

September–October — harvest, plus garlic planted in October for the following summer. Sow cover crops on beds you are finishing with.

November–January — cold frames, garlic under mulch, and planning.

What does well here

Tomatoes, peppers, beans, squash, cucumbers, greens of all kinds, herbs, and garlic all do reliably well. Long-season crops that need cool summers — some brassicas, certain root vegetables — struggle in the July heat unless timed for autumn.

Watering

The binding constraint in a city garden is usually water, not sun. Raised beds and containers dry out fast in July, and most gardens rely on a shared spigot or collected rainwater. Ask how watering is organised before you commit to a plot — a garden without a reliable water source in August is a different proposition entirely.