When to plant Geraniums in Merced County, CA
In Merced County, Geraniums is a spring-only crop. Plant February 3–February 17 once soil hits 50°F.
When to Plant Geraniums in Merced County, CA
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.
Merced County, California is in USDA Zone 9a. The average last spring frost is February 24 and the first fall frost is November 28, giving you a growing season of approximately 277 days.
At an elevation of 269 feet, Merced County receives approximately 18.8 inches of rainfall annually with predominantly loam soil. Summer highs average 87°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.
Merced County Soil Profile
Soil Type
Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Geraniums Planting Timeline — Merced County, CA
Geraniums Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | December 16 | Dec 16 – Dec 30 |
| Transplant Outdoors | February 3 | Feb 3 – Feb 17 |
| Bloom | April 14 | Apr 14 – Oct 13 |
Plant 0.1" deep · 12" apart · Rows 14" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Transplant Outdoors |
| March | — |
| April | Bloom |
| May | Bloom |
| June | Bloom |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | Bloom |
| November | — |
| December | Start Indoors |
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 9a
📆 Growing Season
277 days in Merced County
Growing Tips for Merced 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 Merced County, CA?
Merced County is in Zone 9a with an average last frost of February 24. Plan your Geraniums planting based on this frost date — see the calendar above for exact timing.
What planting zone is Merced County, CA?
Merced County, California is in USDA Hardiness Zone 9a. The average last spring frost is February 24 and first fall frost is November 28.
When should I plant Geraniums in Merced County, CA?
In Merced County, CA, plant Geraniums after the last frost (around February 24) and before the first frost (around November 28). Best results when soil holds above 50°F.
What growing zone is Merced County, CA for Geraniums?
Merced County sits in USDA Zone 9a. Geraniums grows reliably in zones 2a through 11b, so it's a good fit here.
Can Geraniums grow in Merced County's climate?
Yes — Geraniums grows well in Merced County's temperate climate. Merced County averages a 278-day frost-free season, with last frost around February 24 and first frost around November 28.
Your Merced County Garden Planner — Free
A 22-page printable planner built for Merced County (Zone 9a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.