Boise City 2 E, OK Frost Dates & Growing Season

The two dates every Boise City 2 E garden is planned around, plus ready-computed planting windows for the most popular crops.

Last spring frost
Apr 26
~50% chance of frost after
First fall frost
Oct 17
~50% chance of frost before
Growing season
174 days
frost-free stretch
USDA zone
≈ 6b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Apr 10 Apr 26 May 9
First fall frost Oct 29 Oct 17 Oct 4
Hard freeze (28°F), median last Apr 15 · first Oct 25

Computed from NOAA 1991–2020 climate normals at the BOISE CITY 2 E 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 Boise City 2 E

Computed from Boise City 2 E's own frost dates. Click any crop for the full zone-6 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Mar 1 – Mar 15 May 3 – May 10
🫑 Peppers Feb 15 – Mar 1 May 10 – May 17
🥬 Lettuce Mar 15 – Mar 29 Mar 29 – Apr 12 Mar 29 – Apr 26
🫛 Peas Mar 15 – Mar 29
🥕 Carrots Apr 5 – Apr 26
🥦 Broccoli Mar 8 – Mar 22 Apr 5 – Apr 19
🥬 Kale Mar 15 – Mar 29 Mar 29 – Apr 12 Mar 29 – Apr 12
🥒 Cucumbers Mar 29 – Apr 5 May 3 – May 10 May 3 – May 10
🥒 Zucchini Mar 29 – Apr 5 May 3 – May 10 May 3 – May 10
🫘 Green Beans (Bush) May 3 – May 10
🌽 Sweet Corn May 3 – May 10
🌿 Basil Mar 15 – Mar 29 May 3 – May 10 May 10 – May 17
🧄 Garlic Fall: Sep 5 – Oct 3

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 Boise City 2 E's dates automatically after a lookup.

Reading the season in Boise City 2 E

Roughly 174 frost-free days gives Boise City 2 E gardeners room for nearly every common vegetable. Warm-season crops go out after Apr 26; a fall garden sown in late summer matures comfortably before the Oct 17 frost.

Frequently asked questions

When is the last frost in Boise City 2 E, OK?

The average last spring frost in Boise City 2 E is around Apr 26, 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 Boise City 2 E, OK?

The average first fall frost in Boise City 2 E arrives around Oct 17. 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 Boise City 2 E?

About 174 frost-free days on average, from Apr 26 to Oct 17. That fits nearly all common vegetables, though the longest-season melons and sweet potatoes benefit from transplants.

What USDA zone is Boise City 2 E in?

USDA zone 6b 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.