Ranunculus is grown for its root. It's hardy across USDA zones 8 through 10 and stands up to deer. Its summer flowers are a moderate draw for honeybees and native bees, even though the root is the prize.
Ranunculus — the short answer
Ranunculus: grown in zones 8–10, full sun.
- USDA zones
- 8–10
- NC State Extension Gardener Plant Toolbox
- Sun
- Full Sun
- Converted from NC State Extension Gardener Plant Toolbox
Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS and university Extension sources — each tile names its own row's source, because per-field provenance varies.
Score Ranunculus on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether ranunculus actually takes — and those shift from one yard to the next. Enter your address and we'll score ranunculus against your land's real conditions.
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See Ranunculus
What Ranunculus is
Ranunculus reaches around a foot and a half at maturity. It blooms in summer. It's also deer-resistant.
Mature height, bloom period and deer resistance: We haven't confirmed this against a published source yet.
How to grow Ranunculus
Ranunculus grows in USDA zones 8 through 10. Ranunculus does best in full sun — at least 6 hours of direct sun a day.
USDA Zones
8-10
NC State Extension Gardener Plant Toolbox
Soil pH
Data pending
Sun
Full Sun
Converted from NC State Extension Gardener Plant Toolbox
Drainage
Data pending
Mature Height
1.5 ft
We haven't confirmed this against a published source yet.
Sow directly
Sow ranunculus seed straight into the bed — root crops germinate fast and resent transplanting. Give them full sun.
Match the soil
Pull a soil test from your local Extension lab to confirm pH and drainage match ranunculus's needs before planting.
Water steadily
Keep the root zone evenly moist through establishment. We haven't confirmed this against a published source yet. Match watering to the plant's drainage preference and your local rainfall.
Harvest at maturity
Pull while roots are young and tender — sweeter than oversized ones. Local Cooperative Extension guides publish timing tables.
Where Ranunculus thrives
Ranunculus is hardy across USDA zones 8 through 10. Zone is only the starting point, though: the soil pH, drainage, and frost dates on your specific land decide how well it actually does.
A USDA zone is a 10°F band of average annual extreme winter minimum, so zones 8–10 spans average winter lows from 10°F to 40°F (USDA PHZM 2023). Across the 50 states and DC, that band covers 1 outright and splits 27 more down the middle — and which side of that line your land sits on changes the answer.
Zones 8–10·Where Ranunculus growsOpen map →
This map is derived from the USDA ARS / PRISM Plant Hardiness Zone Map (2023) and is not the official USDA Plant Hardiness Zone Map.
Where Ranunculus stands, state by state
Ranunculus is rated for zones 8–10 — a cold floor USDA puts at 10 to 20°F. Across the 50 states and DC, 1 sits fully inside that band, the line runs through 27 more, and 23 sit outside it — and inside every split state, the same line runs on at county grain.
The line runs through
27 states
- Alaska · zones 1a-9a
- Idaho · zones 3b-8a
- California · zones 4b-11a
3 of 27 shown
Ranunculus’s band covers part of each of these states — which side of the line your county sits on changes the answer, and each state page draws it.
State zone extents: USDA Plant Hardiness Zone Map (PHZM) 2023. A zone is a 10°F band of average annual extreme minimum temperature, so a state that splits the band contains the boundary — its own page draws the county line, and a parcel report resolves which side your land sits on.
What grows around Ranunculus
Growing guides for ranunculus
Good to know
One caution for pet owners — ranunculus is toxic to dogs and cats (mild severity). Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: NC State Extension Gardener Plant Toolbox.)
Ranunculus offers moderate value to bees and other pollinators. We haven't confirmed this against a published source yet.
Your land is one point inside Ranunculus's range
This page resolves to the species. Your state page draws the county line, and a report reads the parcel — the soil pH, drainage, sun, and frost dates on your exact ground, which no species average can see.
See if Ranunculus will thrive on your land
Zone averages are a start. Your soil pH, drainage, sun exposure, and frost dates shape whether ranunculus actually takes. We score it against the mapped and modelled 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.
25+ data sources analyzed in seconds
How we know this about Ranunculus
The figures above are cited per row, not per site: the pH band names this plant’s own source column, the three temperature figures each carry their own, and days-to-maturity cites the publication that actually lists it. All of it comes from the Growable Ground Plant Database — a compilation over FAO ECOCROP, USDA PLANTS, and university Extension sources, published openly with per-field provenance.
Grounded inUSDA PLANTS Database
Frequently asked questions
Can I grow Ranunculus in my zone?
Ranunculus grows in USDA hardiness zones 8 through 10 (NC State Extension Gardener Plant Toolbox). Zone is one factor — soil pH, drainage, and frost dates on your specific parcel also shape whether it takes.
When should you plant Ranunculus?
Time ranunculus to your own season rather than the calendar. Your local frost dates set the exact window — a Growable Ground report reads them for your address.
How much sun does Ranunculus need?
Ranunculus needs full sun — a spot that catches at least 6 hours of direct summer sun a day. We haven't confirmed this against a published source yet. 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 Ranunculus need?
Specific pH data for ranunculus is pending. A soil test from your local Extension lab confirms what your site needs.
Does Ranunculus attract pollinators?
Yes — ranunculus's flowers are a solid nectar source for honeybees and native bees. We haven't confirmed this against a published source yet.
Is Ranunculus safe for pets?
Ranunculus is toxic to dogs and cats with mild severity. Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: NC State Extension Gardener Plant Toolbox.)
Keep exploring Ranunculus
Ranunculus state by state
Every state ranunculus's zone reaches — 1 link straight to that state's ranunculus growing page; the rest open the state's full growing guide.