When to Plant Scarlet Runner Beans in USDA Zone 3a
Your June game plan for Zone 3a
If you only do a handful of things in the garden this June, make it these. They're sequenced around your zone's frost timing.
Download your personalised Zone 3a planting plan →Scarlet runner beans are ornamental and edible climbing beans with vivid red flowers that attract hummingbirds. Both the young pods and mature beans are edible.
In Zone 3a, the average last spring frost is around May 15 and the first fall frost is around September 15, giving you a growing season of approximately 123 days.
Scarlet Runner Beans Planting Timeline — Zone 3a
Where Is USDA Zone 3a?
The map below highlights the states that contain Zone 3a. Click any state to see the Scarlet Runner Beans planting schedule for that location.
Scarlet Runner Beans Planting Calendar — Zone 3a
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 13 | Mar 13 – Mar 27 |
| Transplant Outdoors | June 5 | Jun 5 – Jun 19 |
| Direct Sow | May 29 | May 29 – Jun 19 |
| Harvest | August 7 | Aug 7 – Sep 11 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | — |
| May | Direct Sow |
| June | Transplant Outdoors Direct Sow |
| July | — |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Free Zone 3a Planting Calendar PDF
Know exactly when to plant every crop in your zone. Get a printable month-by-month calendar customized for Zone 3a with start dates, transplant windows, and harvest times.
Growing Conditions
Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
Days to Maturity
60–80 days
Soil pH
6 – 7
Zone Temperature Range
-40°F to -35°F average annual minimum
Growing Season
123 days (Zone 3a average)
Planting Specifications
| Planting Depth | 1 inches |
| Plant Spacing | 15 inches apart |
| Row Spacing | 24 inches between rows |
Succession Planting Scarlet Runner Beans in Zone 3a
Sow every 6.9 weeks for continuous harvest throughout the season.
Growing Tips for Scarlet Runner Beans in Zone 3a
Zone 3a has a short growing season (~123 days). Start Scarlet Runner Beans indoors early and use season-extension techniques like row covers and cold frames.
Provide tall trellising for vigorous vines. Direct sow after frost. Harvest pods young for snap beans or let mature for shelling beans. Tubers are perennial in mild climates.
Companion Planting
Good Companions
Avoid Planting Near
The Gardener's Encyclopedia to Companion Planting
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Saving Scarlet Runner Beans Seeds
Recommended for Your Garden
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
Scarlet Runner Beans in Other Zones
Scarlet Runner Beans 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 Scarlet Runner Beans in Zone 3a?
In Zone 3a, plan your Scarlet Runner Beans planting around the average last frost date of May 15. Start seeds indoors around March 13. Direct sow outdoors around May 29. Transplant seedlings around June 5.
Can Scarlet Runner Beans grow in Zone 3a?
Yes, Scarlet Runner Beans can grow well in Zone 3a, hardy in USDA zones 3a through 11b. Zone 3a has a growing season of approximately 123 days, which is sufficient for Scarlet Runner Beans (60-80 days to maturity).
When can I harvest Scarlet Runner Beans in Zone 3a?
In Zone 3a, expect to harvest Scarlet Runner Beans from August 7 – September 11. Scarlet Runner Beans takes 60-80 days from planting to harvest.
What is the last frost date for Zone 3a?
The average last spring frost in Zone 3a is around May 15, and the first fall frost is around September 15. This gives a growing season of approximately 123 days. These are 50% probability dates — actual frost dates vary year to year.
What should I plant next to Scarlet Runner Beans?
Good companion plants for Scarlet Runner Beans include Corn, Squash Summer. These companions can help with pest control, pollination, and nutrient sharing.
Your Zone 3a Garden Planner — Free
A 22-page printable planner tailored to Zone 3a. Planting dates, monthly task lists, harvest log, seed inventory, and succession charts — everything you need to plan a full season.