When to plant Impatiens in Howard County, IN
Howard County's 178-day season only supports one Impatiens planting per year. Sow between April 29 and May 13 for the best chance at full maturity before October 17.
When to Plant Impatiens in Howard County, IN
Impatiens (Impatiens walleriana) are the go-to annual for shaded beds and containers. They produce a continuous carpet of flat-faced blooms from transplant until frost, needing little deadheading. Their preference for consistent moisture and part-shade makes them ideal under trees and along north-facing borders.
Howard County, Indiana is in USDA Zone 6a. The average last spring frost is April 22 and the first fall frost is October 17, giving you a growing season of approximately 178 days.
At an elevation of 1,303 feet, Howard County receives approximately 41.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 86°F, providing good warmth for Impatiens during the growing season.
Howard County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Impatiens Planting Timeline — Howard County, IN
Impatiens Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 25 | Feb 25 – Mar 11 |
| Transplant Outdoors | April 29 | Apr 29 – May 13 |
| Bloom | July 8 | Jul 8 – Oct 14 |
· 10" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | Start Indoors |
| April | Transplant Outdoors |
| May | Transplant Outdoors |
| June | — |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | Bloom |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
Moderate — regular watering
📅 Days to Maturity
60–75 days
🧪 Soil pH
Needs 6–6.5 · Your soil: N/A
🗺️ USDA Zone
Zone 6a
📆 Growing Season
178 days in Howard County
Growing Tips for Howard County
Start seeds indoors 8–10 weeks before last frost at 70–75°F; germination requires light — do not cover seeds. Transplant after last frost once nights consistently exceed 50°F. Water regularly — wilting causes bud drop and they rarely fully recover the same flush. Watch for impatiens downy mildew (IDM); consider New Guinea impatiens as a resistant alternative in affected regions. Pinch tips at planting to encourage branching.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Impatiens in Other Locations
Frequently Asked Questions
When should I plant Impatiens in Howard County, IN?
Howard County is in Zone 6a with an average last frost of April 22. Plan your Impatiens planting based on this frost date — see the calendar above for exact timing.
What planting zone is Howard County, IN?
Howard County, Indiana is in USDA Hardiness Zone 6a. The average last spring frost is April 22 and first fall frost is October 17.
When should I plant Impatiens in Howard County, IN?
In Howard County, IN, plant Impatiens after the last frost (around April 22) and before the first frost (around October 17). Best results when soil holds above 50°F.
What growing zone is Howard County, IN for Impatiens?
Howard County sits in USDA Zone 6a. Impatiens grows reliably in zones 2a through 11b, so it's a good fit here.
Can Impatiens grow in Howard County's climate?
Yes — Impatiens grows well in Howard County's temperate climate. Howard County averages a 178-day frost-free season, with last frost around April 22 and first frost around October 17.
Your Howard County Garden Planner — Free
A 22-page printable planner built for Howard 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.