Chariton 1 E, IA Frost Dates & Growing Season

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

Last spring frost
May 5
~50% chance of frost after
First fall frost
Oct 5
~50% chance of frost before
Growing season
153 days
frost-free stretch
USDA zone
≈ 5b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Apr 21 May 5 May 19
First fall frost Oct 18 Oct 5 Sep 20
Hard freeze (28°F), median last Apr 26 · first Oct 16

Computed from NOAA 1991–2020 climate normals at the CHARITON 1 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 Chariton 1 E

Computed from Chariton 1 E's own frost dates. Click any crop for the full zone-5 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Mar 10 – Mar 24 May 12 – May 19
🫑 Peppers Feb 24 – Mar 10 May 19 – May 26
🥬 Lettuce Mar 24 – Apr 7 Apr 7 – Apr 21 Apr 7 – May 5
🫛 Peas Mar 24 – Apr 7
🥕 Carrots Apr 14 – May 5
🥦 Broccoli Mar 17 – Mar 31 Apr 14 – Apr 28
🥬 Kale Mar 24 – Apr 7 Apr 7 – Apr 21 Apr 7 – Apr 21
🥒 Cucumbers Apr 7 – Apr 14 May 12 – May 19 May 12 – May 19
🥒 Zucchini Apr 7 – Apr 14 May 12 – May 19 May 12 – May 19
🫘 Green Beans (Bush) May 12 – May 19
🌽 Sweet Corn May 12 – May 19
🌿 Basil Mar 24 – Apr 7 May 12 – May 19 May 19 – May 26
🧄 Garlic Fall: Aug 24 – Sep 21

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 Chariton 1 E's dates automatically after a lookup.

Reading the season in Chariton 1 E

Roughly 153 frost-free days gives Chariton 1 E gardeners room for nearly every common vegetable. Warm-season crops go out after May 5; a fall garden sown in late summer matures comfortably before the Oct 5 frost.

Frequently asked questions

When is the last frost in Chariton 1 E, IA?

The average last spring frost in Chariton 1 E is around May 5, 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 Chariton 1 E, IA?

The average first fall frost in Chariton 1 E arrives around Oct 5. 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 Chariton 1 E?

About 153 frost-free days on average, from May 5 to Oct 5. That fits nearly all common vegetables, though the longest-season melons and sweet potatoes benefit from transplants.

What USDA zone is Chariton 1 E in?

USDA zone 5b 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.