When to Plant Collard Greens in Sublette County, WY
Collard greens are a heat-tolerant member of the cabbage family with large, sturdy leaves. They are a Southern staple and one of the most nutritious leafy greens.
Sublette County, Wyoming is in USDA Zone 3b. The average last spring frost is June 22 and the first fall frost is August 24, giving you a growing season of approximately 63 days.
At an elevation of 5,005 feet, Sublette County receives approximately 22.8 inches of rainfall annually with predominantly loam soil. Summer highs average 81°F, so choose short-season varieties of Collard Greens to ensure they mature before fall.
Sublette County Soil Profile
Soil Type
Loam
Soil pH
6.7-7.8
Drainage
Well Drained
Plant Planting Risk Windows
Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.
Plant Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Collard Greens Planting Timeline — Sublette County, WY
Collard Greens Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | May 11 | May 11 – May 25 |
| Transplant Outdoors | June 22 | Jun 22 – Jul 6 |
| Direct Sow | June 15 | Jun 15 – Jul 6 |
| Fall Sowing | June 1 | Jun 1 – Jun 15 |
| Harvest | August 17 | Aug 17 – Oct 19 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Start Indoors |
| June | Transplant Outdoors Direct Sow Fall Sowing |
| July | Transplant Outdoors Direct Sow |
| August | Harvest |
| September | Harvest |
| October | Harvest |
| November | — |
| December | — |
Growing Conditions
Sun
Full Sun (6-8+ hours)
Water
Moderate — regular watering
Days to Maturity
55–75 days
Soil pH
6 – 7
USDA Zone
Zone 3b
Growing Season
63 days
Growing Tips for Sublette County
Start seeds indoors or direct sow 4-6 weeks before last frost. Harvest lower leaves first, leaving the growing tip intact. Flavor improves after exposure to frost.
Companion Planting
Good Companions
Avoid Planting Near
Level Up Your Garden
Collard Greens in Other Locations
Frequently Asked Questions
When should I plant Collard Greens in Sublette County, WY?
Sublette County is in Zone 3b with an average last frost of June 22. Plan your Collard Greens planting based on this frost date — see the calendar above for exact timing.
What planting zone is Sublette County, WY?
Sublette County, Wyoming is in USDA Hardiness Zone 3b. The average last spring frost is June 22 and first fall frost is August 24.
Plan Your Garden with Confidence
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