When to plant Escarole in Summit County, CO
Spring Escarole in Summit County goes in June 2–June 23, once nighttime temps stop dipping near freezing. A second sowing from June 26 to July 10 extends the harvest into fall.
When to Plant Escarole in Summit County, CO
June to-do list for Summit County, Colorado
We've pulled the most time-sensitive tasks for Summit County, Colorado this June and put them front and centre. Tackle them in order.
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Move escarole from tray to bed
Harden off for 7 days — a little more sun each day — before planting. That's the difference between a seedling that thrives and one that stalls.
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Sow escarole where they'll grow
Keep the top inch of soil moist until germination — a gentle morning watering for 5–7 days does the job.
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Plant your fall garden: escarole
A row cover ready in the garage extends your harvest by weeks once the nights turn cold.
Before July arrives, get these ready
- Starting indoors: escarole
Escarole is a broad-leaved endive with slightly bitter, sturdy leaves. The outer leaves are more bitter while the blanched heart is tender and mild.
Summit County, Colorado is in USDA Zone 5a. The average last spring frost is June 16 and the first fall frost is September 4, giving you a growing season of approximately 80 days.
At an elevation of 7,005 feet, Summit County receives approximately 17.5 inches of rainfall annually with predominantly loam soil. Summer highs average 81°F, so choose short-season varieties of Escarole to ensure they mature before fall. With low rainfall, drip irrigation is essential for growing Escarole successfully. Mulch heavily to conserve soil moisture.
Summit County Soil Profile
Soil Type
Loam
Soil pH
6.8-8
Drainage
Well Drained
Escarole 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 Summit County
How your county's soil matches Escarole's growing requirements.
Soil pH
Your soil pH (6.8–8.0) is more alkaline than Escarole prefers (5.5–7.0). Add sulfur or peat moss to lower pH.
Soil Texture
The loam soil in Summit County is excellent for Escarole — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Escarole.
Organic Matter
Organic matter is moderate (2.1%). Annual compost additions will help Escarole.
How to Plant Escarole
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Escarole Water Budget
Water stress score is 8/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Escarole
Escarole needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Escarole Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.4" | 0" | ❄️ Dormant |
| Feb | — | 1.1" | 0" | ❄️ Dormant |
| Mar | — | 1.6" | 0" | ❄️ Dormant |
| Apr | — | 1.7" | 0" | ❄️ Dormant |
| May | — | 1.8" | 0" | ❄️ Dormant |
| Jun | 4.3" | 1.3" | 3" | 🚿 Regular watering |
| Jul | 4.3" | 1.5" | 2.8" | 🚿 Regular watering |
| Aug | 4.3" | 1.9" | 2.4" | 🚿 Regular watering |
| Sep | 4.3" | 1.3" | 3" | 🚿 Regular watering |
| Oct | — | 1.6" | 0" | ❄️ Dormant |
| Nov | — | 1.2" | 0" | ❄️ Dormant |
| Dec | — | 1.2" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Jun–Sep in Summit County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Escarole 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.
Escarole Planting Timeline — Summit County, CO
Escarole Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | May 12 | May 12 – May 26 |
| Transplant Outdoors | June 16 | Jun 16 – Jun 30 |
| Direct Sow | June 2 | Jun 2 – Jun 23 |
| Harvest | August 11 | Aug 11 – Sep 8 |
| Fall Sowing | June 26 | Jun 26 – Jul 10 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Start Indoors |
| June | Transplant Outdoors Direct Sow Fall Sowing |
| July | Fall Sowing |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
1"/week · 1-2 times/week
📅 Days to Maturity
50–70 days
🧪 Soil pH
Needs 5.5–7 · Your soil: too_alkaline
🗺️ USDA Zone
Zone 5a
📆 Growing Season
80 days in Summit County
Growing Tips for Escarole in Summit County
Direct sow Escarole outdoors after June 16 in Summit County when soil has warmed and frost danger has passed.
Common pests for Escarole in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.
Summit County receives only 18" of rain annually. Escarole needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.
General growing tips
Direct sow in spring or late summer. Blanch heads by tying outer leaves together or covering with a pot for 2 weeks before harvest. Excellent braised or in soups.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Escarole in Other Locations
Frequently Asked Questions
When should I plant Escarole in Summit County, CO?
Summit County is in Zone 5a with an average last frost of June 16. Plan your Escarole planting based on this frost date — see the calendar above for exact timing.
What planting zone is Summit County, CO?
Summit County, Colorado is in USDA Hardiness Zone 5a. The average last spring frost is June 16 and first fall frost is September 4.
When should I plant Escarole in Summit County, CO?
In Summit County, CO, plant Escarole after the last frost (around June 16) and before the first frost (around September 4). Best results when soil holds above 50°F.
What growing zone is Summit County, CO for Escarole?
Summit County sits in USDA Zone 5a. Escarole grows reliably in zones 3a through 10b, so it's a good fit here.
Can Escarole grow in Summit County's climate?
Yes — Escarole grows well in Summit County's temperate climate. Summit County averages a 80-day frost-free season, with last frost around June 16 and first frost around September 4.
Your Summit County Garden Planner — Free
A 22-page printable planner built for Summit County (Zone 5a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.