Mountain Laurel is a perennial grown for its purple blooms, which open in mid spring and return year after year. It's hardy across USDA zones 5 through 11, shrugs off deer and shrugs off dry spells. Its mid spring flowers are a moderate draw for native bees.
Mountain Laurel — the short answer
Mountain Laurel: grown in zones 5–11, shade, pH 4.5–5.5.
- USDA zones
- 5–11
- Manual horticultural correction (source not retained); NC State Extension and Missouri Botanical Garden, with the remaining rows from other published sources or Growable Ground compilation
- Soil pH
- 4.5–5.5
- USDA PLANTS
- Sun
- Shade
- Growable Ground Plant Database
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 Mountain Laurel on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether mountain laurel actually takes — and those shift from one yard to the next. Enter your address and we'll score mountain laurel against your land's real conditions.
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What Mountain Laurel is
Mountain Laurel grows as a perennial and reaches around ten feet at maturity. It blooms purple in mid spring. It's also deer-resistant.
How to grow Mountain Laurel
Mountain Laurel grows in USDA zones 5 through 11. Mountain Laurel does best in shade — at least 2 hours of direct sun a day — and soil from pH 4.5 to 5.5. It needs a growing season of at least 150 frost-free days and about 600 hours of winter chill, which is why climate matters as much as soil.
USDA Zones
5-11
USDA PHZM 2023
Soil pH
4.5 - 5.5
USDA PLANTS
Sun
Shade
Growable Ground plant catalog
Drainage
Data pending
Growable Ground plant catalog
Cold Hardiness
-23°F
The coldest temperature this plant is documented to survive.
USDA PLANTS
Mature Height
10 ft
Growable Ground plant catalog
Chill Hours
600+
Winter hours below ~45°F it needs to fruit — too-mild winters can leave it bloom-shy.
Growable Ground plant catalog
Frost-Free Days
150+
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 mountain laurel in shade with at least 2 hours of direct sun.
Match the soil
Mountain Laurel prefers pH 4.5 to 5.5 (USDA PLANTS). 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. Match watering to the plant's drainage preference and your local rainfall.
Harvest at its peak
Cut mountain laurel blooms in the cool of the morning, just as they open, for the longest display.
Where Mountain Laurel thrives
Mountain Laurel is hardy across USDA zones 5 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.
A USDA zone is a 10°F band of average annual extreme winter minimum, so zones 5–11 spans average winter lows from -20°F to 50°F (USDA PHZM 2023). Across the 50 states and DC, that band covers 29 outright and splits 21 more down the middle — and which side of that line your land sits on changes the answer.
Zones 5–11·Where Mountain Laurel growsOpen map →
Where Mountain Laurel stands, state by state
Mountain Laurel is rated for zones 5–11 — a cold floor USDA puts at -20 to -10°F. Across the 50 states and DC, 29 sit fully inside that band, the line runs through 21 more, and 1 sits outside it — and inside every split state, the same line runs on at county grain.
Fully inside zones 5–11
29 states
3 of 29 shown
The line runs through
21 states
3 of 21 shown
Mountain Laurel’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.
Outside zones 5–11
1 state
- North Dakota · zones 3b-4b
Winter cold is the limit here — the same plant often works in a container that comes under cover. Each link is that state’s own growing hub.
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 Mountain Laurel
Growing guides for mountain laurel
In rotation planning, mountain laurel counts as a Other — beds recover best when other crops don’t follow each other in the same spot year over year. (Growable Ground derivation — crop-rotation group from botanical family)
Good to know
One caution for pet owners — mountain laurel is toxic to dogs and cats and horses (severe severity). Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: ASPCA.)
Mountain Laurel offers moderate value to bees and other pollinators. (Source: Lady Bird Johnson Wildflower Center.)
Your land is one point inside Mountain Laurel'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 Mountain Laurel will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether mountain laurel 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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How we know this about Mountain Laurel
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•USDA PHZM•ASPCA
Frequently asked questions
Can I grow Mountain Laurel in my zone?
Mountain Laurel grows in USDA hardiness zones 5 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 Mountain Laurel?
Time mountain laurel to your own season rather than the calendar, leaving enough of the season for its 150-day frost-free need. Your local frost dates set the exact window — a Growable Ground report reads them for your address.
How much sun does Mountain Laurel need?
Mountain Laurel is shade-tolerant — it gets by on as little as 2 hours of direct sun, so it earns a place most vegetables can't use. A north-facing strip or the ground under a leafy canopy is right where it belongs. A Growable Ground report shows which corners of your land stay shaded through the day, turning those dim spots into planting spots.
What soil does Mountain Laurel need?
Mountain Laurel prefers soil pH 4.5 to 5.5 (USDA PLANTS). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Mountain Laurel attract pollinators?
Yes — mountain laurel's flowers are a solid nectar source for native bees. (Source: Lady Bird Johnson Wildflower Center.)
Is Mountain Laurel safe for pets?
Mountain Laurel is toxic to pets (dogs,cats,horses) with severe severity. Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: ASPCA.)