When to Plant Cumin in Los Alamos County, NM
Cumin is a warm-season annual herb whose seeds are one of the most widely used spices globally. It requires a long, hot growing season of 3-4 months.
Los Alamos County, New Mexico is in USDA Zone 6a. The average last spring frost is May 10 and the first fall frost is October 7, giving you a growing season of approximately 150 days.
At an elevation of 5,220 feet, Los Alamos County receives approximately 12.1 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 87°F, providing good warmth for Cumin during the growing season. Sandy soil warms quickly in spring — great for early planting — but Cumin will need more frequent watering and organic matter to retain nutrients. With low rainfall, drip irrigation is essential for growing Cumin successfully. Mulch heavily to conserve soil moisture.
Los Alamos County Soil Profile
Soil Type
Sandy Loam
Soil pH
7-8.6
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 Los Alamos County
How your county's soil matches Cumin's growing requirements.
Soil pH
Your soil pH (7.0–8.6) overlaps with Cumin's range (6.0–8.0), though not a perfect match.
Soil Texture
Sandy soil in Los Alamos County warms quickly in spring but drains fast. Cumin will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Cumin.
Organic Matter
Organic matter is low (0.8%). Add 2-3 inches of compost before planting Cumin.
How to Plant Cumin
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Plant Water Budget
Water stress score is 10/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Cumin
Cumin needs approximately 0.5 inches of water per week (2.2" per month). Here's how your county's rainfall compares month by month.
| Month | Cumin Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 0.9" | 0" | ❄️ Dormant |
| Feb | — | 0.6" | 0" | ❄️ Dormant |
| Mar | — | 0.8" | 0" | ❄️ Dormant |
| Apr | — | 0.4" | 0" | ❄️ Dormant |
| May | 2.2" | 0.3" | 1.9" | 🚿 Regular watering |
| Jun | 2.2" | 0.4" | 1.8" | 🚿 Regular watering |
| Jul | 2.2" | 1.9" | 0.3" | 💧 Light watering |
| Aug | 2.2" | 2.4" | 0" | ✅ Rainfall sufficient |
| Sep | 2.2" | 1.7" | 0.5" | 💧 Light watering |
| Oct | 2.2" | 1.1" | 1.1" | 🚿 Regular watering |
| Nov | — | 0.7" | 0" | ❄️ Dormant |
| Dec | — | 0.8" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Oct in Los Alamos County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Cumin 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.
Cumin Planting Timeline — Los Alamos County, NM
Cumin Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | April 5 | Apr 5 – Apr 19 |
| Transplant Outdoors | May 3 | May 3 – May 17 |
| Direct Sow | April 26 | Apr 26 – May 17 |
| Harvest | August 16 | Aug 16 – Oct 18 |
| Fall Sowing | July 29 | Jul 29 – Aug 12 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Start Indoors Direct Sow |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | Fall Sowing |
| August | Fall Sowing Harvest |
| September | Harvest |
| October | Harvest |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.5"/week · 1-2 times/week
📅 Days to Maturity
100–120 days
🧪 Soil pH
Needs 6–8 · Your soil: acceptable
🗺️ USDA Zone
Zone 6a
📆 Growing Season
150 days in Los Alamos County
Growing Tips for Cumin in Los Alamos County
Direct sow Cumin outdoors after May 10 in Los Alamos County when soil has warmed and frost danger has passed.
Sandy soil in Los Alamos County dries quickly — mulch Cumin with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
Common pests for Cumin in this region include carrot rust fly and parsleyworm. Use row covers early in the season and inspect plants weekly.
Los Alamos County receives only 12" of rain annually. Cumin needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.
General growing tips
Start seeds indoors 4 weeks before last frost. Transplant after all danger of frost. Harvest when seed heads turn brown. Requires consistent warmth for proper seed development.
Companion Planting
Good Companions
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Cumin in Other Locations
Frequently Asked Questions
When should I plant Cumin in Los Alamos County, NM?
Los Alamos County is in Zone 6a with an average last frost of May 10. Plan your Cumin planting based on this frost date — see the calendar above for exact timing.
What planting zone is Los Alamos County, NM?
Los Alamos County, New Mexico is in USDA Hardiness Zone 6a. The average last spring frost is May 10 and first fall frost is October 7.
Plan Your Garden with Confidence
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