Alva 1W, OK Frost Dates & Growing Season

The two dates every Alva 1W garden is planned around, plus ready-computed planting windows for the most popular crops.

Last spring frost
Apr 10
~50% chance of frost after
First fall frost
Oct 28
~50% chance of frost before
Growing season
201 days
frost-free stretch
USDA zone
≈ 7a
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Mar 26 Apr 10 Apr 25
First fall frost Nov 10 Oct 28 Oct 14
Hard freeze (28°F), median last Mar 31 · first Nov 5

Computed from NOAA 1991–2020 climate normals at the ALVA 1W 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 Alva 1W

Computed from Alva 1W's own frost dates. Click any crop for the full zone-7 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Feb 13 – Feb 27 Apr 17 – Apr 24
🫑 Peppers Jan 30 – Feb 13 Apr 24 – May 1
🥬 Lettuce Feb 27 – Mar 13 Mar 13 – Mar 27 Mar 13 – Apr 10
🫛 Peas Feb 27 – Mar 13
🥕 Carrots Mar 20 – Apr 10
🥦 Broccoli Feb 20 – Mar 6 Mar 20 – Apr 3
🥬 Kale Feb 27 – Mar 13 Mar 13 – Mar 27 Mar 13 – Mar 27
🥒 Cucumbers Mar 13 – Mar 20 Apr 17 – Apr 24 Apr 17 – Apr 24
🥒 Zucchini Mar 13 – Mar 20 Apr 17 – Apr 24 Apr 17 – Apr 24
🫘 Green Beans (Bush) Apr 17 – Apr 24
🌽 Sweet Corn Apr 17 – Apr 24
🌿 Basil Feb 27 – Mar 13 Apr 17 – Apr 24 Apr 24 – May 1
🧄 Garlic Fall: Sep 16 – Oct 14

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 Alva 1W's dates automatically after a lookup.

Reading the season in Alva 1W

With roughly 201 frost-free days, Alva 1W gardens fit long-season crops — melons, winter squash, sweet potatoes — with room left for spring and fall rounds of greens and roots. The first frost around Oct 28 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in Alva 1W, OK?

The average last spring frost in Alva 1W is around Apr 10, 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 Alva 1W, OK?

The average first fall frost in Alva 1W arrives around Oct 28. 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 Alva 1W?

About 201 frost-free days on average, from Apr 10 to Oct 28. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is Alva 1W in?

USDA zone 7a 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.