When to Plant Endive in Otero County, CO
Endive is a leafy green with a slightly bitter flavor, available in curly (frisee) and broad-leaved (escarole) types. It adds texture and complexity to salads.
Otero County, Colorado is in USDA Zone 6a. The average last spring frost is April 26 and the first fall frost is October 9, giving you a growing season of approximately 166 days.
At an elevation of 4,145 feet, Otero County receives approximately 14.2 inches of rainfall annually with predominantly loam soil. Summer highs average 90°F, providing good warmth for Endive during the growing season. With low rainfall, drip irrigation is essential for growing Endive successfully. Mulch heavily to conserve soil moisture.
Otero County Soil Profile
Soil Type
Loam
Soil pH
6.4-8.1
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 Otero County
How your county's soil matches Endive's growing requirements.
Soil pH
Your soil pH (6.4–8.1) is more alkaline than Endive prefers (5.5–7.0). Add sulfur or peat moss to lower pH.
Soil Texture
The loam soil in Otero County is excellent for Endive — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.5%). Annual compost additions will help Endive.
How to Plant Endive
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Succession Planting Endive
Sow every 5.1 weeks. Last sowing by Aug 05 to harvest before frost.
For a dedicated fall crop, sow by Jul 31.
Plant Water Budget
Water stress score is 10/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Endive
Endive needs approximately 0.7 inches of water per week (3" per month). Here's how your county's rainfall compares month by month.
| Month | Endive Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1" | 0" | ❄️ Dormant |
| Feb | — | 0.9" | 0" | ❄️ Dormant |
| Mar | — | 1.2" | 0" | ❄️ Dormant |
| Apr | 3" | 1.4" | 1.6" | 🚿 Regular watering |
| May | 3" | 1.5" | 1.5" | 🚿 Regular watering |
| Jun | 3" | 1.1" | 1.9" | 🚿 Regular watering |
| Jul | 3" | 1.5" | 1.5" | 🚿 Regular watering |
| Aug | 3" | 1.3" | 1.7" | 🚿 Regular watering |
| Sep | 3" | 1.1" | 1.9" | 🚿 Regular watering |
| Oct | 3" | 1.2" | 1.8" | 🚿 Regular watering |
| Nov | — | 1" | 0" | ❄️ Dormant |
| Dec | — | 0.9" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Otero County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Endive 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.
Endive Planting Timeline — Otero County, CO
Endive Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 22 | Mar 22 – Apr 5 |
| Transplant Outdoors | April 26 | Apr 26 – May 10 |
| Direct Sow | April 12 | Apr 12 – May 3 |
| Harvest | June 14 | Jun 14 – Jul 19 |
| Fall Sowing | July 31 | Jul 31 – Aug 14 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Start Indoors Transplant Outdoors Direct Sow |
| May | Transplant Outdoors Direct Sow |
| June | Harvest |
| July | Fall Sowing Harvest |
| August | Fall Sowing |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
0.7"/week · 1-2 times/week
📅 Days to Maturity
45–65 days
🧪 Soil pH
Needs 5.5–7 · Your soil: too_alkaline
🗺️ USDA Zone
Zone 6a
📆 Growing Season
166 days in Otero County
Growing Tips for Endive in Otero County
Direct sow Endive outdoors after April 26 in Otero County when soil has warmed and frost danger has passed.
Your generous 166.0-day season in Otero County allows multiple plantings of Endive. Sow every 22.0 days for continuous harvest.
Common pests for Endive in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.
General growing tips
Sow seeds directly in spring or fall. Blanch heads by tying outer leaves together 2-3 weeks before harvest to reduce bitterness. Keep soil evenly moist.
Companion Planting
Good Companions
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Check more plant combinations with our Companion Planting Checker →
Endive in Other Locations
Frequently Asked Questions
When should I plant Endive in Otero County, CO?
Otero County is in Zone 6a with an average last frost of April 26. Plan your Endive planting based on this frost date — see the calendar above for exact timing.
What planting zone is Otero County, CO?
Otero County, Colorado is in USDA Hardiness Zone 6a. The average last spring frost is April 26 and first fall frost is October 9.
Plan Your Garden with Confidence
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