When to plant Cabbage in Adams County County,
Adams County County's climate puts the Cabbage spring window between April 20 and May 11. time plantings around the expected last-frost window for best survival. A second sowing from July 27 to August 10 extends the harvest into fall.
When to Plant Cabbage in Adams County, CO
Your June planting checklist for Adams County, Colorado
We've pulled the most time-sensitive tasks for Adams County, Colorado this June and put them front and centre. Tackle them in order.
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Time to start cabbage inside
Give them 6–8 weeks indoors before the last frost and you'll transplant into warm soil with seedlings that are already leaping.
Get ahead of July
- First harvests: cabbage
- Fall sowing: cabbage
Cabbage is a versatile cool-season crop that forms dense, leafy heads in green, red, or savoy varieties. It is a staple for coleslaw, sauerkraut, and many global cuisines.
Adams County, Colorado is in USDA Zone 6a. The average last spring frost is May 4 and the first fall frost is October 5, giving you a growing season of approximately 154 days.
At an elevation of 5,827 feet, Adams County receives approximately 23.9 inches of rainfall annually with predominantly loam soil. Summer highs average 87°F, providing good warmth for Cabbage during the growing season.
Adams County Soil Profile
Soil Type
Loam
Soil pH
6.6-7.7
Drainage
Well Drained
Cabbage 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 Adams County
How your county's soil matches Cabbage's growing requirements.
Soil pH
Your soil pH (6.6–7.7) overlaps with Cabbage's range (6.0–7.5), though not a perfect match.
Soil Texture
The loam soil in Adams County is excellent for Cabbage — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.7%). Annual compost additions will help Cabbage.
How to Plant Cabbage
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Succession Planting Cabbage
Sow every 6.9 weeks. Last sowing by Jun 27 to harvest before frost.
For a dedicated fall crop, sow by Jul 27.
Cabbage Water Budget
Water stress score is 8/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Cabbage
Cabbage needs approximately 0.9 inches of water per week (3.9" per month). Here's how your county's rainfall compares month by month.
| Month | Cabbage Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.8" | 0" | ❄️ Dormant |
| Feb | — | 1.2" | 0" | ❄️ Dormant |
| Mar | — | 2.2" | 0" | ❄️ Dormant |
| Apr | — | 2.4" | 0" | ❄️ Dormant |
| May | 3.9" | 2.5" | 1.4" | 💧 Light watering |
| Jun | 3.9" | 1.6" | 2.3" | 🚿 Regular watering |
| Jul | 3.9" | 2.1" | 1.8" | 💧 Light watering |
| Aug | 3.9" | 2.8" | 1.1" | 💧 Light watering |
| Sep | 3.9" | 1.8" | 2.1" | 🚿 Regular watering |
| Oct | 3.9" | 2.3" | 1.6" | 💧 Light watering |
| Nov | — | 1.5" | 0" | ❄️ Dormant |
| Dec | — | 1.6" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Oct in Adams County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Cabbage 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.
Cabbage Planting Timeline — Adams County, CO
Cabbage Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 30 | Mar 30 – Apr 13 |
| Transplant Outdoors | May 4 | May 4 – May 18 |
| Direct Sow | April 20 | Apr 20 – May 11 |
| Harvest | July 6 | Jul 6 – Aug 31 |
| Fall Sowing | July 27 | Jul 27 – Aug 10 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Start Indoors Direct Sow |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | Fall Sowing Harvest |
| August | Fall Sowing Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.9"/week · Only during dry spells
📅 Days to Maturity
60–100 days
🧪 Soil pH
Needs 6–7.5 · Your soil: acceptable
🗺️ USDA Zone
Zone 6a
📆 Growing Season
154 days in Adams County
Growing Tips for Cabbage in Adams County
Direct sow Cabbage outdoors after May 04 in Adams County when soil has warmed and frost danger has passed.
Common pests for Cabbage in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.
Adams County receives only 24" of rain annually. Cabbage needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.
General growing tips
Start seeds indoors 4-6 weeks before last frost. Space plants 18-24 inches apart. Keep soil evenly moist to prevent heads from splitting.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Cabbage in Other Locations
Frequently Asked Questions
When should I plant Cabbage in Adams County, CO?
Adams County is in Zone 6a with an average last frost of May 4. Plan your Cabbage planting based on this frost date — see the calendar above for exact timing.
What planting zone is Adams County, CO?
Adams County, Colorado is in USDA Hardiness Zone 6a. The average last spring frost is May 4 and first fall frost is October 5.
When should I plant Cabbage in Adams County, ?
In Adams County, , plant Cabbage after the last frost (around May 4) and before the first frost (around October 5). Best results when soil holds above 50°F.
What growing zone is Adams County, for Cabbage?
Adams County sits in USDA Zone 6a. Cabbage grows reliably in zones 1a through 10b, so it's a good fit here.
Can Cabbage grow in Adams County's climate?
Yes — Cabbage grows well in Adams County's temperate climate. Adams County averages a 154-day frost-free season, with last frost around May 4 and first frost around October 5.
Your Adams County Garden Planner — Free
A 22-page printable planner built for Adams County (Zone 6a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.