When to plant Geraniums in Starke County, IN
In Starke County, Geraniums is a single-season spring crop — there's no second fall window. Plant May 3–May 17 for an 70–100-day harvest, finishing well before the October 18 first frost.
When to Plant Geraniums in Starke County, IN
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.
Starke County, Indiana is in USDA Zone 5b. The average last spring frost is April 26 and the first fall frost is October 18, giving you a growing season of approximately 175 days.
At an elevation of 529 feet, Starke County receives approximately 35.4 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83°F, so choose short-season varieties of Geraniums to ensure they mature before fall.
Starke County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Geraniums Planting Timeline — Starke County, IN
Geraniums Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 15 | Feb 15 – Mar 1 |
| Transplant Outdoors | May 3 | May 3 – May 17 |
| Bloom | July 12 | Jul 12 – Oct 4 |
Plant 0.1" deep · 12" apart · Rows 14" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | Start Indoors |
| April | — |
| May | Transplant Outdoors |
| June | — |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | Bloom |
| November | — |
| 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 5b
📆 Growing Season
175 days in Starke County
Growing Tips for Starke 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 Starke County, IN?
Starke County is in Zone 5b with an average last frost of April 26. Plan your Geraniums planting based on this frost date — see the calendar above for exact timing.
What planting zone is Starke County, IN?
Starke County, Indiana is in USDA Hardiness Zone 5b. The average last spring frost is April 26 and first fall frost is October 18.
When should I plant Geraniums in Starke County, IN?
In Starke County, IN, plant Geraniums after the last frost (around April 26) and before the first frost (around October 18). Best results when soil holds above 50°F.
What growing zone is Starke County, IN for Geraniums?
Starke County sits in USDA Zone 5b. Geraniums grows reliably in zones 2a through 11b, so it's a good fit here.
Can Geraniums grow in Starke County's climate?
Yes — Geraniums grows well in Starke County's temperate climate. Starke County averages a 175-day frost-free season, with last frost around April 26 and first frost around October 18.
Your Starke County Garden Planner — Free
A 22-page printable planner built for Starke County (Zone 5b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.