When to plant Crocus in McCone County, MT
McCone County gardeners should plant Crocus between mid-spring and late spring in spring. With McCone County's Zone 4a climate (last frost May 14), Crocus needs 10–20 days to mature — plant by September 2 for a full harvest. A second sowing from August 11 to August 25 extends the harvest into fall.
When to Plant Crocus in McCone County, MT
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.
McCone County, Montana is in USDA Zone 4a. The average last spring frost is May 14 and the first fall frost is September 22, giving you a growing season of approximately 131 days.
At an elevation of 5,568 feet, McCone County receives approximately 22 inches of rainfall annually with predominantly loam soil. Summer highs average 82°F, so choose short-season varieties of Crocus to ensure they mature before fall.
McCone County Soil Profile
Soil Type
Loam
Soil pH
6.7-8.2
Drainage
Well Drained
Monthly Watering Guide for Crocus
Crocus needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Crocus Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.7" | 0" | ❄️ Dormant |
| Feb | — | 1.1" | 0" | ❄️ Dormant |
| Mar | — | 2" | 0" | ❄️ Dormant |
| Apr | — | 2.6" | 0" | ❄️ Dormant |
| May | 4.3" | 2.7" | 1.6" | 💧 Light watering |
| Jun | 4.3" | 1.4" | 2.9" | 🚿 Regular watering |
| Jul | 4.3" | 1.9" | 2.4" | 🚿 Regular watering |
| Aug | 4.3" | 2.3" | 2" | 💧 Light watering |
| Sep | 4.3" | 1.8" | 2.5" | 🚿 Regular watering |
| Oct | — | 1.7" | 0" | ❄️ Dormant |
| Nov | — | 1.5" | 0" | ❄️ Dormant |
| Dec | — | 1.1" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Sep in McCone County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Crocus Planting Timeline — McCone County, MT
Crocus Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Bloom | June 16 | Jun 16 – Jul 7 |
| Fall Sowing | August 11 | Aug 11 – Aug 25 |
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
Low — drought tolerant
📅 Days to Maturity
10–20 days
🧪 Soil pH
Needs 6–7 · Your soil: N/A
🗺️ USDA Zone
Zone 4a
📆 Growing Season
131 days in McCone County
Growing Tips for McCone County
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 McCone County, MT?
McCone County is in Zone 4a with an average last frost of May 14. Plan your Crocus planting based on this frost date — see the calendar above for exact timing.
What planting zone is McCone County, MT?
McCone County, Montana is in USDA Hardiness Zone 4a. The average last spring frost is May 14 and first fall frost is September 22.
When should I plant Crocus in McCone County, MT?
In McCone County, MT, plant Crocus after the last frost (around May 14) and before the first frost (around September 22). Best results when soil holds above 50°F.
What growing zone is McCone County, MT for Crocus?
McCone County sits in USDA Zone 4a. Crocus grows reliably in zones 3a through 8b, so it's a good fit here.
Can Crocus grow in McCone County's climate?
Yes — Crocus grows well in McCone County's temperate climate. McCone County averages a 131-day frost-free season, with last frost around May 14 and first frost around September 22.
Your McCone County Garden Planner — Free
A 22-page printable planner built for McCone County (Zone 4a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.