When to Plant Cauliflower in Prince of Wales-Hyder, AK
Prince of Wales-Hyder, Alaska gardeners: here's your May plan
A quick May briefing for Prince of Wales-Hyder, Alaska gardeners — what's urgent, what's next, and what can wait.
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Indoor seed-starting week for cauliflower
You're about 25 weeks out from your last frost — the perfect window to get these germinating indoors.
Coming up in June — start thinking about
- First harvests: cauliflower
Cauliflower is a cool-season brassica that produces dense white, purple, or green heads called curds. It is more finicky than broccoli but rewards with a mild, nutty flavor.
Prince of Wales-Hyder, Alaska is in USDA Zone 8a. The average last spring frost is April 13 and the first fall frost is November 1, giving you a growing season of approximately 202 days.
At an elevation of 257 feet, Prince of Wales-Hyder receives approximately 14.4 inches of rainfall annually with predominantly silt loam soil. Summer highs average 70°F, so choose short-season varieties of Cauliflower to ensure they mature before fall. With low rainfall, drip irrigation is essential for growing Cauliflower successfully. Mulch heavily to conserve soil moisture.
Prince of Wales-Hyder Soil Profile
Soil Type
Silt Loam
Soil pH
5.2-6.8
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.
Soil Compatibility in Prince of Wales-Hyder
How your county's soil matches Cauliflower's growing requirements.
Soil pH
Your soil pH (5.2–6.8) overlaps with Cauliflower's range (6.0–7.0), though not a perfect match.
Soil Texture
The silt loam soil in Prince of Wales-Hyder is excellent for Cauliflower — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Cauliflower.
Organic Matter
Organic matter is excellent (6.0%) — Cauliflower will thrive.
How to Plant Cauliflower
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Succession Planting Cauliflower
Sow every 6.3 weeks. Last sowing by Jul 24 to harvest before frost.
For a dedicated fall crop, sow by Aug 23.
Plant Water Budget
Monthly Watering Guide for Cauliflower
Cauliflower needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Cauliflower Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 0.8" | 0" | ❄️ Dormant |
| Feb | — | 0.7" | 0" | ❄️ Dormant |
| Mar | — | 0.6" | 0" | ❄️ Dormant |
| Apr | 4.3" | 0.4" | 3.9" | 🚿 Regular watering |
| May | 4.3" | 0.7" | 3.6" | 🚿 Regular watering |
| Jun | 4.3" | 1" | 3.3" | 🚿 Regular watering |
| Jul | 4.3" | 1.6" | 2.7" | 🚿 Regular watering |
| Aug | 4.3" | 1.9" | 2.4" | 🚿 Regular watering |
| Sep | 4.3" | 2.8" | 1.5" | 💧 Light watering |
| Oct | 4.3" | 1.7" | 2.6" | 🚿 Regular watering |
| Nov | 4.3" | 1.1" | 3.2" | 🚿 Regular watering |
| Dec | — | 0.9" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Nov in Prince of Wales-Hyder). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Cauliflower 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.
Cauliflower Planting Timeline — Prince of Wales-Hyder, AK
Cauliflower Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 9 | Mar 9 – Mar 23 |
| Transplant Outdoors | April 13 | Apr 13 – Apr 27 |
| Direct Sow | March 30 | Mar 30 – Apr 20 |
| Harvest | June 8 | Jun 8 – Aug 10 |
| Fall Sowing | August 23 | Aug 23 – Sep 6 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors Direct Sow |
| April | Transplant Outdoors Direct Sow |
| May | — |
| June | Harvest |
| July | Harvest |
| August | Fall Sowing Harvest |
| September | Fall Sowing |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1"/week · 1-2 times/week
📅 Days to Maturity
55–100 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 8a
📆 Growing Season
202 days in Prince of Wales-Hyder
Growing Tips for Cauliflower in Prince of Wales-Hyder
Direct sow Cauliflower outdoors after April 13 in Prince of Wales-Hyder when soil has warmed and frost danger has passed.
Common pests for Cauliflower in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.
Prince of Wales-Hyder receives only 14" of rain annually. Cauliflower needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.
General growing tips
Start seeds indoors 6 weeks before transplanting. Blanch white varieties by tying outer leaves over the head. Provide consistent moisture and avoid temperature extremes.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Cauliflower in Other Locations
Frequently Asked Questions
When should I plant Cauliflower in Prince of Wales-Hyder, AK?
Prince of Wales-Hyder is in Zone 8a with an average last frost of April 13. Plan your Cauliflower planting based on this frost date — see the calendar above for exact timing.
What planting zone is Prince of Wales-Hyder, AK?
Prince of Wales-Hyder, Alaska is in USDA Hardiness Zone 8a. The average last spring frost is April 13 and first fall frost is November 1.
Your Prince of Wales-Hyder Garden Planner — Free
A 24-page printable planner built for Prince of Wales-Hyder (Zone 8a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.