When to Plant Haskaps in USDA Zone 4a
May in the garden — Zone 4a
Your garden in Zone 4a is working on a schedule, even when you're not. Here's where you should be this May.
Before June arrives, get these ready
- Transplants going out: haskaps
Haskaps (honeyberries) are extremely cold-hardy shrubs producing elongated blue berries with a complex blueberry-raspberry flavor. They fruit very early in the season.
In Zone 4a, the average last spring frost is around May 6 and the first fall frost is around September 28, giving you a growing season of approximately 145 days.
Haskaps Planting Timeline — Zone 4a
Where Is USDA Zone 4a?
The map below highlights the states that contain Zone 4a. Click any state to see the Haskaps planting schedule for that location.
Haskaps Planting Calendar — Zone 4a
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | June 3 | Jun 3 – Jun 17 |
· 48" apart · Rows 72" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | — |
| June | Transplant Outdoors |
| July | — |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Free Zone 4a Planting Calendar PDF
Know exactly when to plant every crop in your zone. Get a printable month-by-month calendar customized for Zone 4a with start dates, transplant windows, and harvest times.
Growing Conditions
Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
Days to Maturity
730–1095 days
Soil pH
5.5 – 7.5
Zone Temperature Range
°F to °F average annual minimum
Growing Season
145 days (Zone average)
Planting Specifications
| Plant Spacing | 48 inches apart |
| Row Spacing | 72 inches between rows |
Growing Tips for Haskaps in Zone
Zone has a short growing season (~145 days). Start Haskaps indoors early and use season-extension techniques like row covers and cold frames.
Plant at least two different varieties for cross-pollination. Fruits ripen 2-3 weeks before strawberries. Protect from birds. Very low maintenance once established. Tolerates extreme cold.
Companion Planting
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Saving Haskaps Seeds
Recommended for Your Garden
Sharp bypass pruners for clean cuts on fruit trees, berry bushes, and woody herbs.
Start seeds indoors with reusable cell trays and humidity domes.
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Related Plants
Haskaps in Other Zones
Haskaps 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 Haskaps in Zone 4a?
In Zone 4a, plan your Haskaps planting around the average last frost date of May 6. Transplant seedlings around June 3.
Can Haskaps grow in Zone 4a?
Yes, Haskaps can grow well in Zone 4a, hardy in USDA zones 2a through 7b. Zone 4a has a growing season of approximately 145 days, which is sufficient for Haskaps (730-1095 days to maturity).
What is the last frost date for Zone 4a?
The average last spring frost in Zone 4a is around May 6, and the first fall frost is around September 28. This gives a growing season of approximately 145 days. These are 50% probability dates — actual frost dates vary year to year.
What should I plant next to Haskaps?
Good companion plants for Haskaps include Blueberries, Currants. These companions can help with pest control, pollination, and nutrient sharing.
Your Free Printable Garden Planner
A 24-page printable planner tailored to your zone. Planting dates, monthly task lists, harvest log, seed inventory, and succession charts — everything you need to plan a full season.