New York planting calendar

When to plant rhubarb in New York — sow, transplant & harvest dates

New York is mostly USDA zone 5b (range 3b-7b). Dates below are derived from rhubarb's frost tolerance and New York's frost window — not generic national averages.

Rhubarb planting timetable for New York

Stage	When in New York	Anchor
Direct-sow outside	mid-April (April 14)	21 days before the last frost (early May (upstate) to mid-April (NYC))
First harvest (estimate)	mid-October (October 13)	~547 days from direct sow

Dates are state-wide averages for the dominant zone. Local microclimates — elevation, urban heat, coastal moderation — can shift the window by 1-2 weeks. Use the frost-date calculator for a date tuned to your town.

Why New York's climate shifts the rhubarb dates

New York's last spring frost averages early May (upstate) to mid-April (NYC) and first fall frost early October (upstate) to early November (NYC), which sets the whole planting clock. New York spans cold Adirondack highlands to mild New York City. Most of upstate gardens in zones 5-6; the city and Long Island run much warmer. Wait for warm soil — rhubarb stall in cold ground even after the air warms, so don't rush them out.

Rhubarb is planted as divisions or crowns in early spring while the soil is still cool, 2-3 weeks before the last frost; it is extremely cold-hardy and actually requires winter chilling to break dormancy (reliably hardy to zone 3, marginal in zones 9-10 where inadequate chilling reduces vigour). Do not harvest in year one; take only 2-3 stalks per plant in year two; harvest freely from year three onward, always leaving at least 3-4 strong stalks per crown. Never eat the leaves — rhubarb foliage contains toxic oxalates at harmful concentrations.

Frost-risk note

Don't plant before early May (upstate) to mid-April (NYC) — a hard freeze can still set young plants back. In the Adirondacks and Tug Hill plateau (zone 3b) the safe date runs a week or two later.

Regional variation within New York

the Adirondacks and Tug Hill plateau (zone 3b) runs roughly 1-2 weeks behind the state average; New York City and Long Island (zone 7b) can plant 1-2 weeks earlier.

New York City — USDA zone 7b
Buffalo — USDA zone 6a
Rochester — USDA zone 6a
Albany — USDA zone 5b
Syracuse — USDA zone 6a

What else to plant in New York around then

Pair the post-frost slot with other warm-season crops — peppers, beans, squash, and cucumbers.

Quick-grow guide

Sun: Full sun — 6+ hours direct (tolerates light afternoon shade in hot zones).
Soil temperature for germination: Soil 4-10 °C (40-50 °F) at crown planting.
Spacing: 36-48 inches (90-120 cm) between plants.
Days to harvest: ~547 days from planting out.

Frequently asked questions

When is the best time to plant rhubarb in New York?

In New York (mostly USDA zone 5b), direct-sow rhubarb mid-April (before the last frost, early May to mid-April), and harvest from mid-October. Rhubarb are cold-hardy — they tolerate frost and actively prefer cool weather, so they go in well before the last spring frost and bolt in summer heat.

What USDA zone is New York?

Most of New York sits in USDA hardiness zone 5b, with the state spanning roughly 3b-7b from the Adirondacks and Tug Hill plateau (zone 3b) to New York City and Long Island (zone 7b). The last spring frost averages early May (upstate) to mid-April (NYC) and the first fall frost early October (upstate) to early November (NYC).

Can you grow rhubarb in New York?

Yes. New York's dominant zone 5b supports rhubarb — the key is timing. Rhubarb are cold-hardy — they tolerate frost and actively prefer cool weather, so they go in well before the last spring frost and bolt in summer heat.

Does the planting date change across New York?

the Adirondacks and Tug Hill plateau (zone 3b) runs roughly 1-2 weeks behind the state average; New York City and Long Island (zone 7b) can plant 1-2 weeks earlier.

What else can I plant in New York around the same time?

Pair the post-frost slot with other warm-season crops — peppers, beans, squash, and cucumbers.

Source and methodology

State zone spans from the USDA Plant Hardiness Zone Map (2023); frost-date averages from NOAA Climate Data Online. Hot-state two-season timing cross-checked against the UF/IFAS Florida Gardening Calendar and the University of Arizona Cooperative Extension planting calendar. Curated by the Growli editorial team.