legume · direct sow · beginner friendly
Scarlet Runner Bean: how much to plant.
A family of 4 eating scarlet runner bean a few times a week needs about 29 plants in ~37 sq ft, worth about $87 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 | 8 | ~10 sq ft | ~15 | ~$24 |
| 2 people | 15 | ~19 sq ft | ~27 | ~$45 |
| 4 people | 29 | ~37 sq ft | ~52 | ~$87 |
| 6 people | 43 | ~54 sq ft | ~76 | ~$129 |
Spacing
6" in row · 30" between rows
Sow depth
1"
Days to harvest
70 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 22 – Jun 30 | — |
| Zone 4 | May 17 – Jul 9 | — |
| Zone 5 | May 7 – Jun 29 | — |
| Zone 6 | Apr 27 – Jun 19 | — |
| Zone 7 | Apr 12 – Jun 4 | — |
| Zone 8 | Apr 1 – May 24 | — |
| Zone 9 | Feb 27 – Apr 21 | — |
| Zone 10 | Feb 7 – Apr 1 | — |
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
Pods 6 to 8 inches, flat, and crisp enough to snap, before seeds bulge. Keep picked or flowering stops.
Don't wait: Stringy past its window faster than regular beans, bulgy pods go to the shell-bean pot.
Yield
About 1 lb per plant over ~8 productive weeks (~1 lb). Fair warning: this is a famous over-producer, pick every 2-3 days or it buries you.
Watch for
Mexican bean beetle · Aphids · Rust & powdery mildew · Anthracnose, the pest guide covers organic fixes for each, and Pest Radar shows what gardeners near you are reporting right now.
Neighbors
Plays well with sweet corn, squash, carrot, summer savory. Keep away from onion, garlic, onion. Which of these hold up, and what not to plant after
On the plate (per 100 g, USDA)
31 kcal · 2.7 g fiber · 12.2 mg vitamin C · 211 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.
Scarlet Runner Bean planting questions
How many scarlet runner bean plants do I need per person?+
For steady eating (about 3 servings a week), plan on roughly 8 plants per person. A family of 4 needs about 29 plants, which takes around 37 sq ft of bed space.
How much space does scarlet runner bean need?+
Space plants 6" apart in the row with 30" between rows. Sow 1" deep. Direct sow in the bed.
When should I plant scarlet runner bean?+
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 scarlet runner bean worth it?+
At about $3.00/lb retail and ~1 lb per plant, a family-of-4 planting is worth about $87 a year at the store. Prices vary by region and season, so treat it as an estimate.