When to plant Collard Greens in Palmer County,
In Palmer County, plant Collard Greens in spring between May 10 and May 31, once soil temps hold above 50°F. Palmer County's last frost averages May 17, so be cautious and check the 10-day forecast before planting tender crops. For a fall crop, sow between June 26 and July 10 — roughly 75 days before the first frost on September 18.
When to Plant Collard Greens in Palmer, AK
Palmer, Alaska gardeners: here's your June plan
We've pulled the most time-sensitive tasks for Palmer, Alaska this June and put them front and centre. Tackle them in order.
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Get collard greens seeds going inside
These need a head start before your last frost (May 17). Sow into cells now so you're ready to transplant in a few weeks.
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Direct-sow collard greens for cool weather
A row cover ready in the garage extends your harvest by weeks once the nights turn cold.
Looking ahead to July
- First harvests: collard greens
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.
Palmer, Alaska is in USDA Zone 4b. The average last spring frost is May 17 and the first fall frost is September 18, giving you a growing season of approximately 124 days.
At an elevation of 1,177 feet, Palmer receives approximately 52.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 69°F, so choose short-season varieties of Collard Greens to ensure they mature before fall. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Collard Greens root diseases.
Palmer Soil Profile
Soil Type
Silt Loam
Soil pH
4.9-6.7
Drainage
Well Drained
Collard Greens 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.
Soil Compatibility in Palmer
How your county's soil matches Collard Greens's growing requirements.
Soil pH
Your soil pH (4.9–6.7) is more acidic than Collard Greens prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
The silt loam soil in Palmer is excellent for Collard Greens — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Collard Greens.
Organic Matter
Organic matter is excellent (6.8%) — Collard Greens will thrive.
How to Plant Collard Greens
Fall planting: Sow 12 weeks before your first frost date for a fall harvest.
Succession Planting Collard Greens
Sow every 6.3 weeks. Last sowing by Jul 05 to harvest before frost.
For a dedicated fall crop, sow by Jun 26.
Collard Greens Water Budget
Monthly Watering Guide for Collard Greens
Collard Greens needs approximately 0.8 inches of water per week (3.5" per month). Here's how your county's rainfall compares month by month.
| Month | Collard Greens Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 2.5" | 0" | ❄️ Dormant |
| Feb | — | 2.5" | 0" | ❄️ Dormant |
| Mar | — | 2.2" | 0" | ❄️ Dormant |
| Apr | — | 1.6" | 0" | ❄️ Dormant |
| May | 3.5" | 2.2" | 1.3" | 💧 Light watering |
| Jun | 3.5" | 4.3" | 0" | ✅ Rainfall sufficient |
| Jul | 3.5" | 7.4" | 0" | ✅ Rainfall sufficient |
| Aug | 3.5" | 7.7" | 0" | ✅ Rainfall sufficient |
| Sep | 3.5" | 8.3" | 0" | ✅ Rainfall sufficient |
| Oct | — | 6.5" | 0" | ❄️ Dormant |
| Nov | — | 3.9" | 0" | ❄️ Dormant |
| Dec | — | 3.3" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Sep in Palmer). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Collard Greens Heat Requirements (GDD)
What are Growing Degree Days (GDD)?
Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.
Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.
Collard Greens Planting Timeline — Palmer, AK
Collard Greens Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | April 5 | Apr 5 – Apr 19 |
| Transplant Outdoors | May 17 | May 17 – May 31 |
| Direct Sow | May 10 | May 10 – May 31 |
| Harvest | July 12 | Jul 12 – Sep 13 |
| Fall Sowing | June 26 | Jun 26 – Jul 10 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Start Indoors |
| May | Transplant Outdoors Direct Sow |
| June | Fall Sowing |
| July | Fall Sowing Harvest |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.8"/week · Natural rainfall sufficient
📅 Days to Maturity
55–75 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 4b
📆 Growing Season
124 days in Palmer
Growing Tips for Collard Greens in Palmer
Direct sow Collard Greens outdoors after May 17 in Palmer when soil has warmed and frost danger has passed.
Common pests for Collard Greens in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.
General growing tips
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
Check more plant combinations with our Companion Planting Checker →
Collard Greens in Other Locations
Frequently Asked Questions
When should I plant Collard Greens in Palmer, AK?
Palmer is in Zone 4b with an average last frost of May 17. Plan your Collard Greens planting based on this frost date — see the calendar above for exact timing.
What planting zone is Palmer, AK?
Palmer, Alaska is in USDA Hardiness Zone 4b. The average last spring frost is May 17 and first fall frost is September 18.
When should I plant Collard Greens in Palmer County, ?
In Palmer County, , plant Collard Greens after the last frost (around May 17) and before the first frost (around September 18). Best results when soil holds above 50°F.
What growing zone is Palmer County, for Collard Greens?
Palmer County sits in USDA Zone 4b. Collard Greens grows reliably in zones 2a through 11b, so it's a good fit here.
Can Collard Greens grow in Palmer County's climate?
Yes — Collard Greens grows well in Palmer County's temperate climate. Palmer County averages a 124-day frost-free season, with last frost around May 17 and first frost around September 18.
Your Palmer Garden Planner — Free
A 22-page printable planner built for Palmer (Zone 4b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.