fruit · transplant
Blackberry: how much to plant.
A family of 4 eating blackberry a few times a week needs about 6 plants in ~144 sq ft, worth about $54 a year at the store. Here are the exact numbers for your household, and when to plant in every zone.
How much to plant
Plants, space, seeds, and value.
Counts assume about 3 servings per person per week with a germination buffer built in. Store value uses ~$3.00/lb retail, an estimate that varies by region and season.
| Household | Plants | Bed space | Seeds to buy | Store value / yr |
|---|---|---|---|---|
| 1 person | 2 | ~48 sq ft | ~3 | ~$18 |
| 2 people | 3 | ~72 sq ft | ~4 | ~$27 |
| 4 people | 6 | ~144 sq ft | ~7 | ~$54 |
| 6 people | 9 | ~216 sq ft | ~10 | ~$81 |
Spacing
36" in row · 96" between rows
Sow depth
0"
Days to harvest
130 from seed
When to plant
Sow windows by USDA zone, 2026.
Zone dates are typical, not exact. The free planner uses your ZIP code's frost dates, not just the zone, and shifts every window to match.
| Zone | Spring sow window | Fall sow window |
|---|---|---|
| Zone 3 | May 1 – Jun 5 | — |
Sow Blackberry by May 1 at the latest. The window runs longer than that, but a later sowing will not finish before your first frost. | ||
| Zone 4 | Apr 26 – May 11 | — |
| Zone 5 | Apr 16 – May 21 | — |
| Zone 6 | Apr 6 – May 11 | — |
| Zone 7 | Mar 22 – Apr 26 | — |
| Zone 8 | Mar 11 – Apr 15 | — |
| Zone 9 | Feb 6 – Mar 13 | — |
| Zone 10 | Jan 17 – Feb 21 | — |
Know when it's time to plant
Give us your ZIP and we'll email you a planting checklist for your exact frost dates, this month's list right now, then once a month when sow windows open.
One email a month, only when there's something to plant. Unsubscribe anytime.
Know before you grow
The practical stuff.
Ready to pick when
Dull black (not shiny), plump, and falls off at a touch. Shiny black berries are still sour.
Yield
About 3 lbs per plant over ~5 productive weeks (~3 lb).
Watch for
Spotted wing drosophila · Japanese beetles · Aphids · Powdery mildew & gray mold, the pest guide covers organic fixes for each, and Pest Radar shows what gardeners near you are reporting right now.
Neighbors
Keep away from raspberry.
On the plate (per 100 g, USDA)
43 kcal · 5.3 g fiber · 21 mg vitamin C · 162 mg potassium
Stop guessing. Get your exact numbers.
Tell the free planner what you want to eat and who you're feeding. It returns plant counts, spacing, and frost-safe sow dates for your ZIP code, not just your zone, in about 60 seconds.
Blackberry cans, freezes, or dries for the pantry. See how much to grow and store to feed your household, and how long it keeps.
Blackberry planting questions
How many blackberry plants do I need per person?+
For steady eating (about 3 servings a week), plan on roughly 2 plants per person. A family of 4 needs about 6 plants, which takes around 144 sq ft of bed space.
How much space does blackberry need?+
Space plants 36" apart in the row with 96" between rows. Sow 0" deep. Start indoors, transplant out.
When should I plant blackberry?+
It depends on your frost dates. Spring sowing is keyed to your last spring frost. The zone table on this page shows typical windows; enter your ZIP in the free planner for dates tuned to your exact location, not just your zone.
Is growing blackberry worth it?+
At about $3.00/lb retail and ~3 lb per plant, a family-of-4 planting is worth about $54 a year at the store. Prices vary by region and season, so treat it as an estimate.