Melville 4 W, MT Frost Dates & Growing Season

The two dates every Melville 4 W garden is planned around, plus ready-computed planting windows for the most popular crops.

Last spring frost
Jun 9
~50% chance of frost after
First fall frost
Sep 7
~50% chance of frost before
Growing season
90 days
frost-free stretch
USDA zone
≈ 4b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost May 26 Jun 9 Jun 27
First fall frost Sep 23 Sep 7 Aug 21
Hard freeze (28°F), median last May 24 · first Sep 22

Computed from NOAA 1991–2020 climate normals at the MELVILLE 4 W station. "Safe" means frost past that date happens only about one year in ten. Your exact garden can still run days either way with elevation and terrain — check your own ZIP with the frost date lookup.

Planting windows for Melville 4 W

Computed from Melville 4 W's own frost dates. Click any crop for the full zone-4 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Apr 14 – Apr 28 Jun 16 – Jun 23
🫑 Peppers Mar 31 – Apr 14 Jun 23 – Jun 30
🥬 Lettuce Apr 28 – May 12 May 12 – May 26 May 12 – Jun 9
🫛 Peas Apr 28 – May 12
🥕 Carrots May 19 – Jun 9
🥦 Broccoli Apr 21 – May 5 May 19 – Jun 2
🥬 Kale Apr 28 – May 12 May 12 – May 26 May 12 – May 26
🥒 Cucumbers May 12 – May 19 Jun 16 – Jun 23 Jun 16 – Jun 23
🥒 Zucchini May 12 – May 19 Jun 16 – Jun 23 Jun 16 – Jun 23
🫘 Green Beans (Bush) Jun 16 – Jun 23
🌽 Sweet Corn Jun 16 – Jun 23
🌿 Basil Apr 28 – May 12 Jun 16 – Jun 23 Jun 23 – Jun 30
🧄 Garlic Fall: Jul 27 – Aug 24

Want this for all 50 crops, or as a printable seed-shelf schedule? Use the planting calendar and the seed starting scheduler — both can use Melville 4 W's dates automatically after a lookup.

Reading the season in Melville 4 W

At about 90 frost-free days, Melville 4 W rewards efficiency: start warm-season crops indoors, favor short-season varieties, and lean on cold-tolerant crops — peas, kale, roots — that shrug off the shoulder-season frosts on either end.

Frequently asked questions

When is the last frost in Melville 4 W, MT?

The average last spring frost in Melville 4 W is around Jun 9, based on 1991–2020 climate normals. That's a median — about half of years see a later frost, so tender crops are safest going out a week or two after this date.

When is the first frost in Melville 4 W, MT?

The average first fall frost in Melville 4 W arrives around Sep 7. Crops still in the garden need to mature before then, and frost-tender plants need harvesting or protection as the date approaches.

How long is the growing season in Melville 4 W?

About 90 frost-free days on average, from Jun 9 to Sep 7. That favors short-season varieties and transplants for warm-season crops, with cool-season vegetables doing the heavy lifting in spring and fall.

What USDA zone is Melville 4 W in?

USDA zone 4b on the 2023 Plant Hardiness Zone Map. Note that zones describe winter cold, not frost timing — these frost dates are the numbers to plan plantings around.