🍇 When to Plant Blackberries
Thornless varieties available; train on trellis; second-year canes bear fruit
📅 Planting Calendar by USDA Zone
Blackberries is a cool-season crop — plant it around your last spring frost, and you can often start it earlier indoors or sow again for a fall harvest. Find the exact start-indoors, transplant, and direct-sow dates for your USDA zone in the table below.
Select your zone to highlight your dates. All dates are calculated from each zone's average frost dates — see how we calculate them.
| Zone | Last Frost | Start Indoors | Transplant | Direct Sow |
|---|---|---|---|---|
| Zone 2A | May 30 | — | May 2 | — |
| Zone 3B | May 15 | — | Apr 17 | — |
| Zone 4A | May 8 | — | Apr 10 | — |
| Zone 4B | May 1 | — | Apr 3 | — |
| Zone 5A | Apr 25 | — | Mar 28 | — |
| Zone 5B | Apr 18 | — | Mar 21 | — |
| Zone 6A | Apr 21 | — | Mar 24 | — |
| Zone 6B | Apr 10 | — | Mar 13 | — |
| Zone 7A | Apr 5 | — | Mar 8 | — |
| Zone 7B | Mar 28 | — | Feb 28 | — |
| Zone 8A | Mar 20 | — | Feb 20 | — |
| Zone 8B | Mar 12 | — | Feb 12 | — |
| Zone 9A | Feb 28 | — | Jan 31 | — |
| Zone 9B | Feb 15 | — | Jan 18 | — |
| Zone 10A | Feb 1 | — | Jan 4 | — |
| Zone 10B | Jan 15 | — | Dec 18 | — |
| Zone 11A | Jan 1 | — | Dec 4 | — |
Blackberries are vigorous, productive cane fruits that thrive with minimal care. Thornless varieties make harvesting a pleasure.
Top Growing Tips
- Thornless varieties (Triple Crown, Chester) are excellent for home gardens
- Train on a trellis or fence for easier management and harvesting
- Prune out old (brown, woody) canes after they fruit
- New canes grow vegetatively year one, fruit year two
- Fully black berries need 3-4 more days on vine to reach peak sweetness
Companion Planting
Good companions: tansy, garlic, marigolds
Avoid planting near: raspberries (cross-disease risk), nightshades
Harvest Timeline
Year 2 after planting; harvest when berries are fully black and slightly soft
Growing blackberries in your region?
These dates come from your zone's frost windows. For the full month-by-month plan — succession sowing, variety picks, and timing tuned to your climate, not just your zone — our regional vegetable-gardening guides cover your area start to finish.
Find your regional growing guide