Hellebore is grown for its blooms, which open in summer. It's hardy across USDA zones 4 through 9 and shrugs off deer. Its summer flowers are a moderate draw for native bees.
Zones
4-9
pH Range
6.5-8
Sun
Part Sun
Days to Maturity
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Score Hellebore on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether hellebore actually takes — and those shift from one yard to the next. Enter your address and we'll score hellebore against your land's real conditions.
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What Hellebore is
Hellebore reaches around a foot and a half at maturity. It blooms in summer. It's also deer-resistant.
How to grow Hellebore
Hellebore grows in USDA zones 4 through 9. Hellebore does best in part sun — at least 4 hours of direct sun a day — and soil from pH 6.5 to 8, on well-drained ground.
USDA Zones
4-9
USDA PHZM 2023
Soil pH
6.5 - 8
USDA PLANTS Database
Sun
Part Sun
Growable Ground plant catalog
Drainage
well (dry spells)
Growable Ground plant catalog
Frost Tolerance
50°F
The lowest temperature it shrugs off — below this, expect damage without cover.
Growable Ground plant catalog
Mature Height
1.5 ft
Growable Ground plant catalog
Frost-Free Days
0+
The frost-free stretch it needs start to finish — short-season areas may need an indoor head start.
Growable Ground plant catalog
Start the season right
Plant hellebore in part sun with at least 4 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Hellebore prefers pH 6.5 to 8 (FAO ECOCROP). A quick soil test from your local Extension lab tells you whether to add lime or sulfur to land in band.
Water steadily
Keep the root zone evenly moist through establishment. A 2–3 inch mulch layer holds moisture without waterlogging.
Harvest at its peak
Cut hellebore blooms in the cool of the morning, just as they open, for the longest display.
Good to know
One caution for pet owners — hellebore is toxic to dogs and cats (moderate severity). Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: ASPCA.)
Hellebore offers moderate value to bees and other pollinators.
Where Hellebore thrives
Hellebore is hardy across USDA zones 4 through 9. 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 4–9·Where Hellebore growsOpen map →
On USDA hardiness-zone overlap, Hellebore can grow in these states:
See if Hellebore will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether hellebore 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 Hellebore in my zone?
Hellebore grows in USDA hardiness zones 4 through 9 (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 Hellebore?
Most growers plant hellebore after the last spring frost, once the soil has warmed. Your local frost dates set the exact window — a Growable Ground report reads them for your address.
How much sun does Hellebore need?
Hellebore does well in partial sun — around 4 hours of direct sun, and it takes some afternoon shade in stride. That flexibility makes it a good match for a bed the house or a nearby tree shades for part of the day. A Growable Ground report maps how the sun actually falls on your land, hour by hour, so you can set it where the light lines up.
What soil does Hellebore need?
Hellebore prefers soil pH 6.5 to 8, on well-drained ground (FAO ECOCROP). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Hellebore attract pollinators?
Yes — hellebore's flowers are a solid nectar source for native bees.
Is Hellebore safe for pets?
Hellebore is toxic to pets (dogs,cats) with moderate severity. Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: ASPCA.)