When to Plant Green Beans in Kalawao County, HI
Your May game plan for Kalawao County, Hawaii
Here's what deserves your attention in Kalawao County, Hawaii this month. Everything below is tailored to Zone 11a and timed around your local frost dates.
Green beans are a warm-season staple available as bush or pole types. Bush beans produce a concentrated harvest while pole beans provide a longer picking season.
Kalawao County, Hawaii is in USDA Zone 11a. The average last spring frost is January 1 and the first fall frost is December 31, giving you a growing season of approximately 364 days.
At an elevation of 402 feet, Kalawao County receives approximately 28.4 inches of rainfall annually with predominantly silty clay soil. Summer highs average 85°F, providing good warmth for Green Beans during the growing season. Clay soil retains moisture well for Green Beans, but amend with compost to improve drainage and prevent root rot.
Kalawao County Soil Profile
Soil Type
Silty Clay
Soil pH
5.7-6.7
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 Kalawao County
How your county's soil matches Green Beans's growing requirements.
Soil pH
Your soil pH (5.7–6.7) overlaps with Green Beans's range (6.0–7.0), though not a perfect match.
Soil Texture
Your silty clay soil in Kalawao County is workable for Green Beans. Add compost annually to improve structure.
Organic Matter
Organic matter is moderate (3.9%). Annual compost additions will help Green Beans.
How to Plant Green Beans
Plant Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Green Beans
Green Beans 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 | Green Beans Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | 3.9" | 4.1" | 0" | ✅ Rainfall sufficient |
| Feb | 3.9" | 3.1" | 0.8" | 💧 Light watering |
| Mar | 3.9" | 3.4" | 0.5" | 💧 Light watering |
| Apr | 3.9" | 2.6" | 1.3" | 💧 Light watering |
| May | 3.9" | 1.6" | 2.3" | 🚿 Regular watering |
| Jun | 3.9" | 0.9" | 3" | 🚿 Regular watering |
| Jul | 3.9" | 0.7" | 3.2" | 🚿 Regular watering |
| Aug | 3.9" | 0.9" | 3" | 🚿 Regular watering |
| Sep | 3.9" | 1.4" | 2.5" | 🚿 Regular watering |
| Oct | 3.9" | 2.8" | 1.1" | 💧 Light watering |
| Nov | 3.9" | 2.9" | 1" | 💧 Light watering |
| Dec | 3.9" | 4" | 0" | ✅ Rainfall sufficient |
Water needs are for active growing months only (Jan–Dec in Kalawao County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Green Beans 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.
Green Beans Planting Timeline — Kalawao County, HI
Green Beans Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | January 8 | Jan 8 – Jan 29 |
| Harvest | March 5 | Mar 5 – Apr 30 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Direct Sow |
| February | — |
| March | Harvest |
| April | Harvest |
| May | — |
| June | — |
| July | — |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.9"/week · 1-2 times/week
📅 Days to Maturity
50–65 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 11a
📆 Growing Season
364 days in Kalawao County
Growing Tips for Green Beans in Kalawao County
With Kalawao County's clay soil (37% clay), work in 3-4 inches of compost before planting Green Beans. Avoid tilling when soil is wet to prevent compaction.
Common pests for Green Beans in this region include bean beetles and aphids. Use row covers early in the season and inspect plants weekly.
General growing tips
Direct sow after last frost when soil is warm. Provide sturdy supports for pole varieties. Pick beans regularly when young and tender to encourage continued production.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Avoid harvesting during damp weather. Isolate 25 ft between varieties.
Green Beans in Other Locations
Frequently Asked Questions
When should I plant Green Beans in Kalawao County, HI?
Kalawao County is in Zone 11a with an average last frost of January 1. Plan your Green Beans planting based on this frost date — see the calendar above for exact timing.
What planting zone is Kalawao County, HI?
Kalawao County, Hawaii is in USDA Hardiness Zone 11a. The average last spring frost is January 1 and first fall frost is December 31.
Your Kalawao County Garden Planner — Free
A 24-page printable planner built for Kalawao County (Zone 11a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.