When to Plant Garlic Chives in Rio Grande County, CO
This month in Rio Grande County, Colorado
Here's what deserves your attention in Rio Grande County, Colorado this month. Everything below is tailored to Zone 5b and timed around your local frost dates.
June will be here before you know it — start on
- Transplants going out: garlic chives
Garlic chives are a perennial herb with flat leaves that have a mild garlic flavor. They produce attractive white flower clusters and are used in Asian cooking.
Rio Grande County, Colorado is in USDA Zone 5b. The average last spring frost is May 31 and the first fall frost is September 19, giving you a growing season of approximately 111 days.
At an elevation of 6,254 feet, Rio Grande County receives approximately 15.8 inches of rainfall annually with predominantly loam soil. Summer highs average 80°F, so choose short-season varieties of Garlic Chives to ensure they mature before fall. With low rainfall, drip irrigation is essential for growing Garlic Chives successfully. Mulch heavily to conserve soil moisture.
Rio Grande County Soil Profile
Soil Type
Loam
Soil pH
6.5-7.8
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 Rio Grande County
How your county's soil matches Garlic Chives's growing requirements.
Soil pH
Your soil pH (6.5–7.8) overlaps with Garlic Chives's range (6.0–7.5), though not a perfect match.
Soil Texture
The loam soil in Rio Grande County is excellent for Garlic Chives — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Garlic Chives.
Organic Matter
Organic matter is moderate (2.7%). Annual compost additions will help Garlic Chives.
How to Plant Garlic Chives
Succession Planting Garlic Chives
Sow every 6.9 weeks. Last sowing by Jun 21 to harvest before frost.
Plant Water Budget
Water stress score is 8/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Garlic Chives
Garlic Chives 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 | Garlic Chives Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.1" | 0" | ❄️ Dormant |
| Feb | — | 1" | 0" | ❄️ Dormant |
| Mar | — | 1.5" | 0" | ❄️ Dormant |
| Apr | — | 1.5" | 0" | ❄️ Dormant |
| May | 2.2" | 2" | 0.2" | 💧 Light watering |
| Jun | 2.2" | 1" | 1.2" | 🚿 Regular watering |
| Jul | 2.2" | 1.4" | 0.8" | 💧 Light watering |
| Aug | 2.2" | 1.9" | 0.3" | 💧 Light watering |
| Sep | 2.2" | 1.4" | 0.8" | 💧 Light watering |
| Oct | — | 1.2" | 0" | ❄️ Dormant |
| Nov | — | 0.9" | 0" | ❄️ Dormant |
| Dec | — | 1" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Sep in Rio Grande County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Garlic Chives 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.
Garlic Chives Planting Timeline — Rio Grande County, CO
Garlic Chives Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | June 7 | Jun 7 – Jun 21 |
| Harvest | August 9 | Aug 9 – Oct 18 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | — |
| June | Transplant Outdoors |
| July | — |
| August | Harvest |
| September | Harvest |
| October | Harvest |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.5"/week · Only during dry spells
📅 Days to Maturity
60–90 days
🧪 Soil pH
Needs 6–7.5 · Your soil: acceptable
🗺️ USDA Zone
Zone 5b
📆 Growing Season
111 days in Rio Grande County
Growing Tips for Garlic Chives in Rio Grande County
Direct sow Garlic Chives outdoors after May 31 in Rio Grande County when soil has warmed and frost danger has passed.
Common pests for Garlic Chives in this region include onion maggots and thrips. Use row covers early in the season and inspect plants weekly.
Rio Grande County receives only 16" of rain annually. Garlic Chives needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.
General growing tips
Start from seed or divisions. Cut flower stalks before seeds set to prevent aggressive self-seeding. Both leaves and flower buds are edible and flavorful.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Garlic Chives in Other Locations
Frequently Asked Questions
When should I plant Garlic Chives in Rio Grande County, CO?
Rio Grande County is in Zone 5b with an average last frost of May 31. Plan your Garlic Chives planting based on this frost date — see the calendar above for exact timing.
What planting zone is Rio Grande County, CO?
Rio Grande County, Colorado is in USDA Hardiness Zone 5b. The average last spring frost is May 31 and first fall frost is September 19.
Your Rio Grande County Garden Planner — Free
A 24-page printable planner built for Rio Grande County (Zone 5b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.