When to Plant Peas in Sierra County, NM
Peas are a cool-season legume that fixes nitrogen in the soil. Garden peas are shelled, while snap and snow peas are eaten pod and all.
Sierra County, New Mexico is in USDA Zone 7a. The average last spring frost is April 15 and the first fall frost is October 26, giving you a growing season of approximately 194 days.
At an elevation of 4,898 feet, Sierra County receives approximately 17.4 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 88°F, providing good warmth for Peas during the growing season. Sandy soil warms quickly in spring — great for early planting — but Peas will need more frequent watering and organic matter to retain nutrients. With low rainfall, drip irrigation is essential for growing Peas successfully. Mulch heavily to conserve soil moisture.
Sierra County Soil Profile
Soil Type
Sandy Loam
Soil pH
7.3-8.5
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 Sierra County
How your county's soil matches Peas's growing requirements.
Soil pH
Your soil pH (7.3–8.5) is more alkaline than Peas prefers (6.0–7.5). Add sulfur or peat moss to lower pH.
Soil Texture
Sandy soil in Sierra County warms quickly in spring but drains fast. Peas will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Peas.
Organic Matter
Organic matter is low (0.7%). Add 2-3 inches of compost before planting Peas.
How to Plant Peas
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Succession Planting Peas
Sow every 6.3 weeks. Last sowing by Aug 17 to harvest before frost.
For a dedicated fall crop, sow by Aug 17.
Plant Water Budget
Water stress score is 8/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Peas
Peas needs approximately 0.7 inches of water per week (3" per month). Here's how your county's rainfall compares month by month.
| Month | Peas Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.4" | 0" | ❄️ Dormant |
| Feb | — | 1" | 0" | ❄️ Dormant |
| Mar | — | 1" | 0" | ❄️ Dormant |
| Apr | 3" | 0.6" | 2.4" | 🚿 Regular watering |
| May | 3" | 0.4" | 2.6" | 🚿 Regular watering |
| Jun | 3" | 0.5" | 2.5" | 🚿 Regular watering |
| Jul | 3" | 2.7" | 0.3" | 💧 Light watering |
| Aug | 3" | 3.3" | 0" | ✅ Rainfall sufficient |
| Sep | 3" | 2.3" | 0.7" | 💧 Light watering |
| Oct | 3" | 1.7" | 1.3" | 💧 Light watering |
| Nov | — | 1" | 0" | ❄️ Dormant |
| Dec | — | 1.3" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Sierra County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Peas 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.
Peas Planting Timeline — Sierra County, NM
Peas Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 11 | Mar 11 – Mar 25 |
| Transplant Outdoors | April 15 | Apr 15 – Apr 29 |
| Direct Sow | April 1 | Apr 1 – Apr 22 |
| Harvest | June 10 | Jun 10 – Aug 5 |
| Fall Sowing | August 17 | Aug 17 – Aug 31 |
Plant 1" deep · 4" apart · Rows 18" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Transplant Outdoors Direct Sow |
| May | — |
| June | Harvest |
| July | Harvest |
| August | Fall Sowing Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.7"/week · 1-2 times/week
📅 Days to Maturity
55–70 days
🧪 Soil pH
Needs 6–7.5 · Your soil: too_alkaline
🗺️ USDA Zone
Zone 7a
📆 Growing Season
194 days in Sierra County
Growing Tips for Peas in Sierra County
Direct sow Peas outdoors after April 15 in Sierra County when soil has warmed and frost danger has passed.
Sandy soil in Sierra County dries quickly — mulch Peas with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
Common pests for Peas in this region include bean beetles and aphids. Use row covers early in the season and inspect plants weekly.
General growing tips
Direct sow as early as soil can be worked in spring. Inoculate seeds with rhizobium for best nitrogen fixation. Provide trellising for climbing varieties.
Recommended Peas Varieties for Sierra County
Heat-tolerant peas — plant very early or as fall crop
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Very easy to save. Self-pollinating means varieties stay true.
Peas in Other Locations
Frequently Asked Questions
When should I plant Peas in Sierra County, NM?
Sierra County is in Zone 7a with an average last frost of April 15. Plan your Peas planting based on this frost date — see the calendar above for exact timing.
What planting zone is Sierra County, NM?
Sierra County, New Mexico is in USDA Hardiness Zone 7a. The average last spring frost is April 15 and first fall frost is October 26.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Sierra County gardeners in Zone 7a organize planting dates, track what's growing, and never miss a planting window.
Get Your Free Garden Planner →Free download. Plan your entire garden season in minutes.