When to Plant Impatiens in USDA Zone 11a
What to do in July
We've pulled the most time-sensitive tasks for Zone 11a this July and put them front and centre. Tackle them in order.
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Plan the fall garden
Make a planting map for August. Tomatoes, peppers, brassicas, lettuce, root crops all go in over the next 8 weeks. Soil amendments and irrigation prep happen now.
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Keep heat-survivor crops productive
Daily harvest of okra and southern peas keeps plants producing. Let pods over-mature and the plant stops setting new fruit.
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Watch for hurricane prep season
August-October is hurricane season. Stake young trees, secure rain barrels, and plan how to protect tender transplants from high winds.
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 11a, the average last spring frost is around January 1 and the first fall frost is around December 31, giving you a growing season of approximately 364 days.
Impatiens Planting Timeline — Zone 11a
Where Is USDA Zone 11a?
The map below highlights the states that contain Zone 11a. Click any state to see the Impatiens planting schedule for that location.
Impatiens Planting Calendar — Zone 11a
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | November 6 | Nov 6 – Nov 20 |
| Transplant Outdoors | November 6 | Nov 6 – Nov 20 |
| Bloom | January 15 | Jan 15 – Aug 27 |
· 10" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Bloom |
| February | Bloom |
| March | Bloom |
| April | Bloom |
| May | Bloom |
| June | Bloom |
| July | Bloom |
| August | Bloom |
| September | — |
| October | — |
| November | Start Indoors Transplant Outdoors |
| December | — |
Free Zone 11a Planting Calendar PDF
Know exactly when to plant every crop in your zone. Get a printable month-by-month calendar customized for Zone 11a 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
40°F to 45°F average annual minimum
Growing Season
365 days (Zone 11a average)
Planting Specifications
| Plant Spacing | 10 inches apart |
| Row Spacing | 12 inches between rows |
Succession Planting Impatiens in Zone 11a
Sow every 6.9 weeks for continuous harvest throughout the season.
Growing Tips for Impatiens in Zone 11a
Zone 11a offers a long growing season (~365 days). You can plant Impatiens earlier and may get multiple harvests.
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
The Gardener's Encyclopedia to Companion Planting
The pairings that make vegetables, herbs, and flowers grow better — and the ones that quietly wreck a bed.
- Proven pairings for 200+ vegetables, herbs, flowers, and fruits
- Full seed-starting + planting schedule with timing and spacing
- Bonus: square-foot gardening guide + printable seasonal planners
Saving Impatiens Seeds
Recommended for Your Garden
Reduce heat stress and sun scorch in hot climates with UV-stabilized shade cloth.
Start seeds indoors with reusable cell trays and humidity domes.
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
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 11a?
In Zone 11a, plan your Impatiens planting around the average last frost date of January 1. Start seeds indoors around November 6. Transplant seedlings around November 6.
Can Impatiens grow in Zone 11a?
Yes, Impatiens can grow well in Zone 11a, hardy in USDA zones 2a through 11b. Zone 11a has a growing season of approximately 364 days, which is sufficient for Impatiens (60-75 days to maturity).
When can I harvest Impatiens in Zone 11a?
In Zone 11a, expect to harvest Impatiens from January 15 – August 27. Impatiens takes 60-75 days from planting to harvest.
What is the last frost date for Zone 11a?
The average last spring frost in Zone 11a is around January 1, and the first fall frost is around December 31. This gives a growing season of approximately 364 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 11a Garden Planner — Free
A 22-page printable planner tailored to Zone 11a. Planting dates, monthly task lists, harvest log, seed inventory, and succession charts — everything you need to plan a full season.