When to plant Geraniums in Nez Perce County, ID
Nez Perce County sits in cold Zone 7b. Plant Geraniums May 12–May 26 for the single annual harvest; the September 26 first frost closes the window.
When to Plant Geraniums in Nez Perce County, ID
Geraniums (Pelargonium × hortorum) are tender perennials grown as warm-season annuals throughout North America. Prized for their bold flower clusters, long bloom period, and tolerance of summer heat when planted in well-drained soil, they anchor window boxes, containers, and bed borders from late spring until hard frost. Zones 9b–11b can overwinter plants in the ground.
Nez Perce County, Idaho is in USDA Zone 7b. The average last spring frost is May 12 and the first fall frost is September 26, giving you a growing season of approximately 137 days.
At an elevation of 4,819 feet, Nez Perce County receives approximately 16.7 inches of rainfall annually with predominantly loam soil. Summer highs average 90°F, providing good warmth for Geraniums during the growing season. With low rainfall, drip irrigation is essential for growing Geraniums successfully. Mulch heavily to conserve soil moisture.
Nez Perce County Soil Profile
Soil Type
Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Geraniums Planting Timeline — Nez Perce County, ID
Geraniums Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 3 | Mar 3 – Mar 17 |
| Transplant Outdoors | May 12 | May 12 – May 26 |
| Bloom | July 21 | Jul 21 – Nov 24 |
Plant 0.1" deep · 12" apart · Rows 14" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | — |
| May | Transplant Outdoors |
| June | — |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | Bloom |
| November | Bloom |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
📅 Days to Maturity
70–100 days
🧪 Soil pH
Needs 6–7 · Your soil: N/A
🗺️ USDA Zone
Zone 7b
📆 Growing Season
137 days in Nez Perce County
Growing Tips for Nez Perce County
Start seeds indoors 10–12 weeks before last frost — germination is slow and erratic without bottom heat (70–75°F). Transplant after frost danger passes. Geraniums rarely direct-sown; cuttings or transplants are the standard. Deadhead spent umbels weekly to maintain continuous bloom. Let soil dry slightly between waterings to prevent root rot. In zones 10–11 plants may be left in ground year-round or overwintered as houseplants.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Geraniums in Other Locations
Frequently Asked Questions
When should I plant Geraniums in Nez Perce County, ID?
Nez Perce County is in Zone 7b with an average last frost of May 12. Plan your Geraniums planting based on this frost date — see the calendar above for exact timing.
What planting zone is Nez Perce County, ID?
Nez Perce County, Idaho is in USDA Hardiness Zone 7b. The average last spring frost is May 12 and first fall frost is September 26.
When should I plant Geraniums in Nez Perce County, ID?
In Nez Perce County, ID, plant Geraniums after the last frost (around May 12) and before the first frost (around September 26). Best results when soil holds above 50°F.
What growing zone is Nez Perce County, ID for Geraniums?
Nez Perce County sits in USDA Zone 7b. Geraniums grows reliably in zones 2a through 11b, so it's a good fit here.
Can Geraniums grow in Nez Perce County's climate?
Yes — Geraniums grows well in Nez Perce County's temperate climate. Nez Perce County averages a 137-day frost-free season, with last frost around May 12 and first frost around September 26.
Your Nez Perce County Garden Planner — Free
A 22-page printable planner built for Nez Perce County (Zone 7b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.