When to plant sweet corn in New York
New York’s average last spring frost is May 1, and the first fall frost typically arrives around October 5 — about 157 frost-free days (USDA zones 3b, 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b). Sweet Corn needs 60–100 days to mature, which fits comfortably within New York's growing season.
New York covers a wide range of climates, so your exact frost dates may differ from the state average by two weeks or more. For dates tuned to your town, use the calendar generator.
When to plant sweet corn in New York: the short answer
For a spring planting, sow May 3 – May 22. Wait until the soil is at least 55°F and frost is over.
Succession sow again in New York: May 22 · Jun 5 · Jun 19 · Jul 3 · Jul 17
Windows are ~1–2 week bands around each date. Frost dates are a statewide average from NOAA/NCEI normals; your town may differ by two weeks or more. Calendar year 2026.
How to grow sweet corn in New York, step by step
- Prepare the bed. It needs at least six to eight hours of direct sun a day and loose soil at least 24 inches deep, with a pH between 5.8 and 7.0. Dig in compost before planting.
- Sow outdoors (May 3 – May 22). Space plants about 10 inches apart in rows 30 inches apart, sowing seed 1.5 inches deep. It is killed by frost, so nothing goes outside until the danger has passed.
- Water and feed. It needs plenty of water; keep the soil evenly moist and never let it dry out.
- Watch for pests and problems. Pests: corn earworm, European corn borer, corn rootworm, raccoons. Diseases and disorders: common smut, common rust, Stewart's wilt.
- Harvest (from about Jul 7 – Aug 16). Sweet Corn takes 60-100 days to reach harvest. Plant in a block of at least 4 short rows, not one long row, or the ears fill unevenly. Keep sugar-enhanced and supersweet types isolated from field corn. Succeed by sowing every 2 weeks or planting early/mid/late varieties together.
Figures come from our crop data; dates use New York’s average frost dates. More in the full sweet corn growing guide.
Sweet Corn planting dates by USDA zone in New York
New York spans USDA zones 3b, 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b. Colder zones, usually higher or further inland, have a later last spring frost and an earlier first fall frost than the state average, so the sweet corn dates shift with them.
When to plant sweet corn in nearby states
| State | Last frost | Sow |
|---|---|---|
| New York (this page) | May 1 | May 3 – May 22 |
| Maine | May 14 | May 16 – Jun 4 |
| New Hampshire | May 13 | May 15 – Jun 3 |
| Vermont | May 14 | May 16 – Jun 4 |
| Massachusetts | April 24 | Apr 26 – May 15 |
| Rhode Island | April 25 | Apr 27 – May 16 |
| Connecticut | April 25 | Apr 27 – May 16 |
Questions gardeners in New York ask
When is the best time to plant sweet corn in New York?
Sow sweet corn in New York between May 3 and May 22. That timing is set by New York's average last spring frost of May 1; New York spans several climates, so cooler and higher parts of the state run later.
What is the latest I can plant sweet corn in New York?
About August 6. Sweet corn needs at least 60 days to mature, and frost around October 5 ends the season, so later plantings risk being cut short.
When will sweet corn planted in New York be ready to harvest?
Planted on time, sweet corn is usually ready from about July 7 to August 16, 60-100 days after sowing.
When is the last frost in New York?
On average around May 1, with the first fall frost around October 5 - about 157 frost-free days. Your town may differ by two weeks or more.