Mercury 3 SSW, NV Frost Dates & Growing Season

The two dates every Mercury 3 SSW garden is planned around, plus ready-computed planting windows for the most popular crops.

Last spring frost
Mar 10
~50% chance of frost after
First fall frost
Nov 19
~50% chance of frost before
Growing season
254 days
frost-free stretch
USDA zone
≈ 8b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Feb 17 Mar 10 Apr 8
First fall frost Dec 2 Nov 19 Nov 1
Hard freeze (28°F), median last Feb 17 · first Nov 30

Computed from NOAA 1991–2020 climate normals at the MERCURY 3 SSW 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 Mercury 3 SSW

Computed from Mercury 3 SSW's own frost dates. Click any crop for the full zone-8 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Jan 13 – Jan 27 Mar 17 – Mar 24
🫑 Peppers Dec 30 – Jan 13 Mar 24 – Mar 31
🥬 Lettuce Jan 27 – Feb 10 Feb 10 – Feb 24 Feb 10 – Mar 10
🫛 Peas Jan 27 – Feb 10
🥕 Carrots Feb 17 – Mar 10
🥦 Broccoli Jan 20 – Feb 3 Feb 17 – Mar 3
🥬 Kale Jan 27 – Feb 10 Feb 10 – Feb 24 Feb 10 – Feb 24
🥒 Cucumbers Feb 10 – Feb 17 Mar 17 – Mar 24 Mar 17 – Mar 24
🥒 Zucchini Feb 10 – Feb 17 Mar 17 – Mar 24 Mar 17 – Mar 24
🫘 Green Beans (Bush) Mar 17 – Mar 24
🌽 Sweet Corn Mar 17 – Mar 24
🌿 Basil Jan 27 – Feb 10 Mar 17 – Mar 24 Mar 24 – Mar 31
🧄 Garlic Fall: Oct 8 – Nov 5

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 Mercury 3 SSW's dates automatically after a lookup.

Reading the season in Mercury 3 SSW

With roughly 254 frost-free days, Mercury 3 SSW 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 Nov 19 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in Mercury 3 SSW, NV?

The average last spring frost in Mercury 3 SSW is around Mar 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 Mercury 3 SSW, NV?

The average first fall frost in Mercury 3 SSW arrives around Nov 19. 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 Mercury 3 SSW?

About 254 frost-free days on average, from Mar 10 to Nov 19. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is Mercury 3 SSW in?

USDA zone 8b 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.