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When to plant Borage in Bent County, CO

The best window to plant Borage in Bent County, is April 15–May 6, when soil warms to 50°F. Last frost typically hits April 29; first frost October 9. A second sowing from July 31 to August 14 extends the harvest into fall.

When to Plant Borage in Bent County, CO

Bent County, Colorado Zone 6a July

Your July game plan for Bent County, Colorado

Your garden in Bent County, Colorado is working on a schedule, even when you're not. Here's where you should be this July.

Avg. last frost April 29
Avg. first frost October 9
Soil temp (4") 68°F
Watering Critical
Pest pressure High
Daylight 14.4 hrs
  1. Pick borage

    Check every 1–2 days. Many of these get tough or go to seed if you wait too long.

  2. Plant your fall garden: borage

    Fall crops get sweeter with a light frost. Don't be afraid of cool nights.

A few tasks this July that'll pay off in August
  • First harvests: borage

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Borage is a self-seeding annual herb with star-shaped blue flowers that attract pollinators. Its leaves have a cucumber-like flavor and the flowers are edible.

Bent County, Colorado is in USDA Zone 6a. The average last spring frost is April 29 and the first fall frost is October 9, giving you a growing season of approximately 163 days.

At an elevation of 4,516 feet, Bent County receives approximately 12.4 inches of rainfall annually with predominantly loam soil. Summer highs average 87°F, providing good warmth for Borage during the growing season. With low rainfall, drip irrigation is essential for growing Borage successfully. Mulch heavily to conserve soil moisture.

Bent County, CO (Zone 6a) Moderate season
163 days
Last Spring Frost April 29
163 growing days
First Fall Frost October 9

Bent County Soil Profile

Soil Type

Loam

Soil pH

6.8-7.8

Drainage

Well Drained

Borage Planting Risk Windows

Early Start (70% safe) ✓ Fits season (65 days to spare)
Start indoors: Mar 21 Transplant: Apr 18 🍅 Harvest: Jun 13 – Aug 1
Recommended (50%) ✓ Fits season (65 days to spare)
Start indoors: Mar 25 Transplant: Apr 22 🍅 Harvest: Jun 17 – Aug 5
Safe Start (90%) ✓ Fits season (66 days to spare)
Start indoors: Apr 7 Transplant: May 5 🍅 Harvest: Jun 30 – Aug 18

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 Bent County

How your county's soil matches Borage's growing requirements.

Soil pH

Your soil pH (6.8–7.8) is more alkaline than Borage prefers (6.0–7.0). Add sulfur or peat moss to lower pH.

Soil Texture

The loam soil in Bent County is excellent for Borage — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (2.5%). Annual compost additions will help Borage.

How to Plant Borage

0.5"
Planting Depth
8"
Between Plants
12"
Between Rows

Fall planting: Sow 10 weeks before your first frost date for a fall harvest.

Succession Planting Borage

3
successive plantings in your 163-day season

Sow every 5.7 weeks. Last sowing by Aug 10 to harvest before frost.

For a dedicated fall crop, sow by Jul 31.

Borage Water Budget

Plant needs
0.5″/week
Rainfall provides
0.3″/week
You supply
0.2″/week
Watering frequency Only during dry spells
Season total 314 gal / 100 sq ft
Drought risk

Water stress score is 8/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Borage

Borage 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 Borage Needs Rainfall You Supplement Action
Jan 0.9" 0" ❄️ Dormant
Feb 0.6" 0" ❄️ Dormant
Mar 1" 0" ❄️ Dormant
Apr 2.2" 1.4" 0.8" 💧 Light watering
May 2.2" 1.6" 0.6" 💧 Light watering
Jun 2.2" 0.9" 1.3" 🚿 Regular watering
Jul 2.2" 1" 1.2" 🚿 Regular watering
Aug 2.2" 1.4" 0.8" 💧 Light watering
Sep 2.2" 1" 1.2" 🚿 Regular watering
Oct 2.2" 1.1" 1.1" 🚿 Regular watering
Nov 0.8" 0" ❄️ Dormant
Dec 0.8" 0" ❄️ Dormant

Water needs are for active growing months only (Apr–Oct in Bent County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Borage 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.

Borage needs ~839 GDD — county provides 2,485 GDD Excellent fit

Borage Planting Timeline — Bent County, CO

Borage Planting Calendar

Activity When Date Range
Start Indoors March 25 Mar 25 – Apr 8
Transplant Outdoors April 22 Apr 22 – May 6
Direct Sow April 15 Apr 15 – May 6
Harvest June 17 Jun 17 – Aug 5
Fall Sowing July 31 Jul 31 – Aug 14

Plant 0.5" deep · 8" apart · Rows 12" apart

Month-by-Month Timeline

MonthActivities
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 Harvest
September
October
November
December

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.5"/week · Only during dry spells

📅 Days to Maturity

50–60 days

🧪 Soil pH

Needs 6–7 · Your soil: too_alkaline

🗺️ USDA Zone

Zone 6a

📆 Growing Season

163 days in Bent County

Growing Tips for Borage in Bent County

Direct sow Borage outdoors after April 29 in Bent County when soil has warmed and frost danger has passed.

General growing tips

Direct sow in spring as borage does not transplant well. Allow some plants to go to seed for next year. Young leaves are best; older leaves become bristly.

Companion Planting

Good Companions

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Borage in Bent County, CO?

Bent County is in Zone 6a with an average last frost of April 29. Plan your Borage planting based on this frost date — see the calendar above for exact timing.

What planting zone is Bent County, CO?

Bent County, Colorado is in USDA Hardiness Zone 6a. The average last spring frost is April 29 and first fall frost is October 9.

When should I plant Borage in Bent County, CO?

In Bent County, CO, plant Borage after the last frost (around April 29) and before the first frost (around October 9). Best results when soil holds above 50°F.

What growing zone is Bent County, CO for Borage?

Bent County sits in USDA Zone 6a. Borage grows reliably in zones 3a through 11b, so it's a good fit here.

Can Borage grow in Bent County's climate?

Yes — Borage grows well in Bent County's temperate climate. Bent County averages a 163-day frost-free season, with last frost around April 29 and first frost around October 9.

🌱

Your Bent County Garden Planner — Free

A 22-page printable planner built for Bent County (Zone 6a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Bent County, CO. Local conditions may vary. Last updated: July 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.