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When to plant Crocus in Montrose County County,
Montrose County County gardeners should plant Crocus between mid-spring and late spring in spring. With Montrose County County's Zone 6b climate (last frost June 13), Crocus needs 20 days to mature — plant by August 23 for a full harvest. A second sowing from August 1 to August 15 extends the harvest into fall.
When to Plant Crocus in Montrose County, CO
June in the garden — Montrose County, Colorado
We've pulled the most time-sensitive tasks for Montrose County, Colorado this June and put them front and centre. Tackle them in order.
Crocuses (Crocus spp.) are the heralds of spring — small, gem-like blooms that push up through frozen ground or even snow, often weeks before any other flower. Their compact corms naturalize readily in lawns, rock gardens, and borders, creating drifts of purple, white, and yellow that expand year after year. Bees prize early crocus as one of their first nectar and pollen sources of the season. The saffron crocus (C. sativus) blooms in fall and yields the world's most expensive spice.
Montrose County, Colorado is in USDA Zone 6b. The average last spring frost is June 13 and the first fall frost is September 12, giving you a growing season of approximately 91 days.
At an elevation of 6,494 feet, Montrose County receives approximately 18.4 inches of rainfall annually with predominantly loam soil. Summer highs average 87°F, providing good warmth for Crocus during the growing season. With low rainfall, drip irrigation is essential for growing Crocus successfully. Mulch heavily to conserve soil moisture.
Montrose County Soil Profile
Soil Type
Loam
Soil pH
6.7-7.9
Drainage
Well Drained
Crocus 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 Montrose County
How your county's soil matches Crocus's growing requirements.
Soil pH
Your soil pH (6.7–7.9) is more alkaline than Crocus prefers (6.0–7.0). Add sulfur or peat moss to lower pH.
Soil Texture
The loam soil in Montrose County is excellent for Crocus — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.5%). Annual compost additions will help Crocus.
How to Plant Crocus
Fall planting: Sow 6 weeks before your first frost date for a fall harvest.
Succession Planting Crocus
Sow every 1.1 weeks. Last sowing by Aug 23 to harvest before frost.
For a dedicated fall crop, sow by Aug 01.
Crocus Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Crocus
Crocus 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 | Crocus Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.4" | 0" | ❄️ Dormant |
| Feb | — | 1" | 0" | ❄️ Dormant |
| Mar | — | 1.4" | 0" | ❄️ Dormant |
| Apr | — | 2.2" | 0" | ❄️ Dormant |
| May | — | 2.3" | 0" | ❄️ Dormant |
| Jun | 2.2" | 1.2" | 1" | 💧 Light watering |
| Jul | 2.2" | 1.8" | 0.4" | 💧 Light watering |
| Aug | 2.2" | 1.7" | 0.5" | 💧 Light watering |
| Sep | 2.2" | 1.5" | 0.7" | 💧 Light watering |
| Oct | — | 1.6" | 0" | ❄️ Dormant |
| Nov | — | 1.3" | 0" | ❄️ Dormant |
| Dec | — | 1.1" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Jun–Sep in Montrose County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Crocus 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.
Crocus Planting Timeline — Montrose County, CO
Crocus Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Bloom | June 20 | Jun 20 – Jul 11 |
| Fall Sowing | August 1 | Aug 1 – Aug 15 |
Plant 4" deep · 3" apart · Rows 4" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | — |
| June | Bloom |
| July | Bloom |
| August | Fall Sowing |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.5"/week · Natural rainfall sufficient
📅 Days to Maturity
10–20 days
🧪 Soil pH
Needs 6–7 · Your soil: too_alkaline
🗺️ USDA Zone
Zone 6b
📆 Growing Season
91 days in Montrose County
Growing Tips for Crocus in Montrose County
Direct sow Crocus outdoors after June 13 in Montrose County when soil has warmed and frost danger has passed.
Your generous 91.0-day season in Montrose County allows multiple plantings of Crocus. Sow every 5.0 days for continuous harvest.
Montrose County receives only 18" of rain annually. Crocus needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.
General growing tips
Plant corms 3–4 inches deep and 2–3 inches apart in fall, when soil temperature drops below 60°F. Mass plantings (at least 25 corms per cluster) create the most visual impact. Plant in well-drained soil — corms rot in standing water. Crocus naturalize well under deciduous trees; the tree leafs out after crocus dormancy begins, so light competition is minimal. Squirrels and chipmunks dig corms — plant deeper (4 inches) or use wire mesh baskets in high-predation areas. Allow foliage to die back naturally before mowing lawns. In zones 8a–8b, plant in December with pre-chilled corms for best results.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Crocus in Other Locations
Frequently Asked Questions
When should I plant Crocus in Montrose County, CO?
Montrose County is in Zone 6b with an average last frost of June 13. Plan your Crocus planting based on this frost date — see the calendar above for exact timing.
What planting zone is Montrose County, CO?
Montrose County, Colorado is in USDA Hardiness Zone 6b. The average last spring frost is June 13 and first fall frost is September 12.
When should I plant Crocus in Montrose County, ?
In Montrose County, , plant Crocus after the last frost (around June 13) and before the first frost (around September 12). Best results when soil holds above 50°F.
What growing zone is Montrose County, for Crocus?
Montrose County sits in USDA Zone 6b. Crocus grows reliably in zones 3a through 8b, so it's a good fit here.
Can Crocus grow in Montrose County's climate?
Yes — Crocus grows well in Montrose County's temperate climate. Montrose County averages a 91-day frost-free season, with last frost around June 13 and first frost around September 12.
Your Montrose County Garden Planner — Free
A 22-page printable planner built for Montrose County (Zone 6b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.