Scarlet Runner Bean is a tree, a long-term addition to the landscape. It's hardy across USDA zones 7 through 11, shrugs off deer and grows just as well in a container as in the ground. Its summer flowers are a real draw for honeybees, native bees, and hummingbirds. A nitrogen-fixer, it draws nitrogen from the air and feeds it back to the soil — turn it under or leave the roots in place, and the next planting inherits a richer bed.
Zones
7-11
pH Range
5.5-7.5
Sun
Full Sun
Days to Maturity
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Score Scarlet Runner Bean on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether scarlet runner bean actually takes — and those shift from one yard to the next. Enter your address and we'll score scarlet runner bean against your land's real conditions.
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What Scarlet Runner Bean is
Scarlet Runner Bean grows as a perennial and reaches around twelve feet at maturity. It blooms red in summer. It's also deer-resistant and well suited to containers.
How to grow Scarlet Runner Bean
Scarlet Runner Bean grows in USDA zones 7 through 11. Scarlet Runner Bean does best in full sun — at least 6 hours of direct sun a day — and soil from pH 5.5 to 7.5, on well-drained ground. It needs around 900 growing degree days to mature and a growing season of at least 70 frost-free days, which is why climate matters as much as soil.
USDA Zones
7-11
USDA PHZM 2023
Soil pH
5.5 - 7.5
USDA PLANTS Database
Sun
Full Sun
Growable Ground plant catalog
Drainage
well (dry spells)
Growable Ground plant catalog
GDD Required
900+
Growing degree-days of accumulated warmth it needs to mature — humid summers reach this faster than cool coastal ones.
Growable Ground plant catalog
Mature Height
12 ft
Growable Ground plant catalog
Frost-Free Days
70+
The frost-free stretch it needs start to finish — short-season areas may need an indoor head start.
Growable Ground plant catalog
Plant it right
Set scarlet runner bean in full sun with well-drained soil. Many fruit trees need a second variety nearby to pollinate — check before you plant just one.
Match the soil
Scarlet Runner Bean prefers pH 5.5 to 7.5 (Growable Ground Plant Database). A quick soil test from your local Extension lab tells you whether to add lime or sulfur to land in band. It fixes its own nitrogen, so skip the high-nitrogen feed and instead dust the seed with a matching rhizobium inoculant at sowing.
Water steadily
Keep the root zone evenly moist through establishment. A 2–3 inch mulch layer holds moisture without waterlogging.
Be patient, then harvest
Prune annually while the tree establishes; fruit trees reward patience with years of harvest. Local Extension guides publish per-cultivar bearing-age tables.
Good to know
Good news for pet owners — scarlet runner bean isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Scarlet Runner Bean is a standout pollinator plant — high value to bees and other pollinators. (Source: Pollinator Partnership.)
Before you harvest scarlet runner bean, know your soil
Anything you grow to eat takes up what's in the ground it grows in, so it's worth knowing what's documented near you before you plant scarlet runner bean for food. Our free screen reads 9 federal source types across roughly 1.8M indexed sites and shows which sit near your address and which way they drain. It's a screening estimate from public records and proximity — not a soil test — so a nearby record means a soil test is worth it, not that your soil is unsafe.
Where Scarlet Runner Bean thrives
Scarlet Runner Bean is hardy across USDA zones 7 through 11. Zone is only the starting point, though: the soil pH, drainage, and frost dates on your specific land decide how well it actually does.
Zones 7–11·Where Scarlet Runner Bean growsOpen map →
On USDA hardiness-zone overlap, Scarlet Runner Bean can grow in these states:
See if Scarlet Runner Bean will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether scarlet runner bean actually takes — we score it against the real conditions at your address.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
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Frequently Asked Questions
Can I grow Scarlet Runner Bean in my zone?
Scarlet Runner Bean grows in USDA hardiness zones 7 through 11 (USDA PHZM 2023). Zone is one factor — soil pH, drainage, and frost dates on your specific parcel also shape whether it takes.
When should you plant Scarlet Runner Bean?
Set scarlet runner bean out in early spring or fall while it's dormant, so the roots establish before the heat of summer. Your local last-frost date — which a Growable Ground report pulls for your exact address — sets the precise window.
How much sun does Scarlet Runner Bean need?
Scarlet Runner Bean needs full sun — a spot that catches at least 6 hours of direct summer sun a day. In more shade it still grows, but usually gives a smaller, later crop. The catch is that a yard rarely gets even light everywhere — a fence, the house, or one tall tree can quietly take those hours. A Growable Ground report reads the real sun-hours across your land, canopy and buildings included, so you can pick the brightest bed before you plant.
What soil does Scarlet Runner Bean need?
Scarlet Runner Bean prefers soil pH 5.5 to 7.5, on well-drained ground (Growable Ground Plant Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Scarlet Runner Bean attract pollinators?
Yes — scarlet runner bean's flowers are a strong nectar and pollen source for honeybees, native bees, and hummingbirds. (Source: Pollinator Partnership.)
Is Scarlet Runner Bean safe for pets?
Scarlet Runner Bean is not known to be toxic to dogs or cats based on available data. Always supervise pets around new plantings. (Source: ASPCA.)