When to plant Crocus in Bannock County County,
The best window to plant Crocus in Bannock County County, is mid-spring–late spring, when soil warms to 50°F. Last frost typically hits May 23; first frost September 24. A second sowing from August 13 to August 27 extends the harvest into fall.
When to Plant Crocus in Bannock County, ID
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.
Bannock County, Idaho is in USDA Zone 6a. The average last spring frost is May 23 and the first fall frost is September 24, giving you a growing season of approximately 124 days.
At an elevation of 5,637 feet, Bannock County receives approximately 13.1 inches of rainfall annually with predominantly loam soil. Summer highs average 83°F, so choose short-season varieties of Crocus to ensure they mature before fall. With low rainfall, drip irrigation is essential for growing Crocus successfully. Mulch heavily to conserve soil moisture.
Bannock County Soil Profile
Soil Type
Loam
Soil pH
6.7-8.1
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" | 0" | ❄️ Dormant |
| Feb | — | 0.8" | 0" | ❄️ Dormant |
| Mar | — | 1.1" | 0" | ❄️ Dormant |
| Apr | — | 1.4" | 0" | ❄️ Dormant |
| May | 4.3" | 1.5" | 2.8" | 🚿 Regular watering |
| Jun | 4.3" | 0.9" | 3.4" | 🚿 Regular watering |
| Jul | 4.3" | 1.1" | 3.2" | 🚿 Regular watering |
| Aug | 4.3" | 1.4" | 2.9" | 🚿 Regular watering |
| Sep | 4.3" | 1" | 3.3" | 🚿 Regular watering |
| Oct | — | 1" | 0" | ❄️ Dormant |
| Nov | — | 1" | 0" | ❄️ Dormant |
| Dec | — | 0.8" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Sep in Bannock County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Crocus Planting Timeline — Bannock County, ID
Crocus Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Bloom | July 2 | Jul 2 – Jul 23 |
| Fall Sowing | August 13 | Aug 13 – Aug 27 |
Plant 4" deep · 3" apart · Rows 4" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | — |
| June | — |
| 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 6a
📆 Growing Season
124 days in Bannock County
Growing Tips for Bannock 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 Bannock County, ID?
Bannock County is in Zone 6a with an average last frost of May 23. Plan your Crocus planting based on this frost date — see the calendar above for exact timing.
What planting zone is Bannock County, ID?
Bannock County, Idaho is in USDA Hardiness Zone 6a. The average last spring frost is May 23 and first fall frost is September 24.
When should I plant Crocus in Bannock County County, ?
In Bannock County County, , plant Crocus after the last frost (around May 23) and before the first frost (around September 24). Best results when soil holds above 50°F.
What growing zone is Bannock County County, for Crocus?
Bannock County County sits in USDA Zone 6a. Crocus grows reliably in zones 3a through 8b, so it's a good fit here.
Can Crocus grow in Bannock County County's climate?
Yes — Crocus grows well in Bannock County County's temperate climate. Bannock County County averages a 124-day frost-free season, with last frost around May 23 and first frost around September 24.
Your Bannock County Garden Planner — Free
A 22-page printable planner built for Bannock 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.