When to Plant Impatiens in USDA Zone 2b
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.
In Zone 2b, the average last spring frost is around May 22 and the first fall frost is around September 10, giving you a growing season of approximately 111 days.
Impatiens Planting Timeline — Zone 2b
Where Is USDA Zone 2b?
The map below highlights the states that contain Zone 2b. Click any state to see the Impatiens planting schedule for that location.
Impatiens Planting Calendar — Zone 2b
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 13 | Mar 13 – Mar 27 |
| Transplant Outdoors | June 5 | Jun 5 – Jun 19 |
| Bloom | August 21 | Aug 21 – Sep 25 |
· 10" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | — |
| May | — |
| June | Transplant Outdoors |
| July | — |
| August | Bloom |
| September | Bloom |
| October | — |
| November | — |
| December | — |
Free Zone 2b Planting Calendar PDF
Know exactly when to plant every crop in your zone. Get a printable month-by-month calendar customized for Zone 2b with start dates, transplant windows, and harvest times.
Growing Conditions
Sun
Partial Shade (3-6 hours)
💧 Water
Moderate — regular watering
Days to Maturity
60–75 days
Soil pH
6 – 6.5
Zone Temperature Range
-45°F to -40°F average annual minimum
Growing Season
111 days (Zone 2b average)
Planting Specifications
| Plant Spacing | 10 inches apart |
| Row Spacing | 12 inches between rows |
Succession Planting Impatiens in Zone 2b
Sow every 6.9 weeks for continuous harvest throughout the season.
Growing Tips for Impatiens in Zone 2b
Zone 2b has a short growing season (~111 days). Start Impatiens indoors early and use season-extension techniques like row covers and cold frames.
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
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Saving Impatiens Seeds
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Full-spectrum LED lights for starting seeds indoors when daylight is limited.
Warm soil for faster germination of heat-loving crops like tomatoes and peppers.
Protect plants from frost, wind, and pests while letting light and water through.
Related Plants
Impatiens in Other Zones
Impatiens by State
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
Frequently Asked Questions
When should I plant Impatiens in Zone 2b?
In Zone 2b, plan your Impatiens planting around the average last frost date of May 22. Start seeds indoors around March 13. Transplant seedlings around June 5.
Can Impatiens grow in Zone 2b?
Yes, Impatiens can grow well in Zone 2b, hardy in USDA zones 2a through 11b. Zone 2b has a growing season of approximately 111 days, which is sufficient for Impatiens (60-75 days to maturity).
When can I harvest Impatiens in Zone 2b?
In Zone 2b, expect to harvest Impatiens from August 21 – September 25. Impatiens takes 60-75 days from planting to harvest.
What is the last frost date for Zone 2b?
The average last spring frost in Zone 2b is around May 22, and the first fall frost is around September 10. This gives a growing season of approximately 111 days. These are 50% probability dates — actual frost dates vary year to year.
What should I plant next to Impatiens?
Good companion plants for Impatiens include Hostas, Ferns, Caladiums, Begonias. These companions can help with pest control, pollination, and nutrient sharing.
Your Zone 2b Garden Planner — Free
A 22-page printable planner tailored to Zone 2b. Planting dates, monthly task lists, harvest log, seed inventory, and succession charts — everything you need to plan a full season.