When to plant winter squash in Vermont
Vermont’s average last spring frost is May 14, and the first fall frost typically arrives around September 25 — about 134 frost-free days (USDA zones 3b, 4a, 4b, 5a, 5b). Winter Squash needs 80–110 days to mature, which fits comfortably within Vermont's growing season.
When to plant winter squash in Vermont: the short answer
For a spring planting, plant out May 14 – May 31, with seeds started indoors Apr 16 – Apr 30. Wait until the soil is at least 60°F and frost is over.
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 winter squash in Vermont, step by step
- Start seeds indoors (Apr 16 – Apr 30). Sow seeds 1 inch deep in seed-starting mix under bright light. They take 5-10 days to sprout, fastest in soil around 85°F. Harden seedlings off for a week before they go outside.
- Prepare the bed. It needs at least six to eight hours of direct sun a day and loose soil at least 18 inches deep, with a pH between 5.5 and 7.0. Dig in compost before planting.
- Plant out (May 14 – May 31). Space plants about 42 inches apart in rows 72 inches apart. It is killed by frost, so nothing goes outside until the danger has passed.
- Water and feed. Give it steady, even moisture, about an inch of water a week from rain or the hose.
- Watch for pests and problems. Pests: squash vine borer, squash bug, striped cucumber beetle. Diseases and disorders: powdery mildew, bacterial wilt.
- Harvest (from about Aug 9 – Sep 8). Winter Squash takes 80-110 days to reach harvest. Needs the whole season - direct sow only where you have 100+ frost-free days. Cure 10 days in warmth after harvest for storage.
Figures come from our crop data; dates use Vermont’s average frost dates. More in the full winter squash growing guide.
Winter Squash planting dates by USDA zone in Vermont
Vermont spans USDA zones 3b, 4a, 4b, 5a, 5b. 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 winter squash dates shift with them.
When to plant winter squash in nearby states
| State | Last frost | Plant out |
|---|---|---|
| Vermont (this page) | May 14 | May 14 – May 31 |
| Maine | May 14 | May 14 – May 31 |
| New Hampshire | May 13 | May 13 – May 30 |
| Massachusetts | April 24 | Apr 24 – May 11 |
| Rhode Island | April 25 | Apr 25 – May 12 |
| Connecticut | April 25 | Apr 25 – May 12 |
| New York | May 1 | May 1 – May 18 |
Questions gardeners in Vermont ask
When is the best time to plant winter squash in Vermont?
Plant winter squash transplants outdoors in Vermont between May 14 and May 31. That timing is set by Vermont's average last spring frost of May 14.
When should I start winter squash seeds indoors in Vermont?
Start seeds indoors between April 16 and April 30, about 3 weeks before the last frost, so the seedlings are ready to plant out from May 14.
What is the latest I can plant winter squash in Vermont?
About July 7. Winter squash needs at least 80 days to mature, and frost around September 25 ends the season, so later plantings risk being cut short.
When will winter squash planted in Vermont be ready to harvest?
Planted on time, winter squash is usually ready from about August 9 to September 8, 80-110 days after planting.
When is the last frost in Vermont?
On average around May 14, with the first fall frost around September 25 - about 134 frost-free days. Your town may differ by two weeks or more.