Protea is a perennial grown for its blooms, which open in summer and return year after year. It's hardy across USDA zones 9 through 11, shrugs off deer and shrugs off dry spells. Its summer flowers are a moderate draw for native bees and hummingbirds.
Zones
9-11
pH Range
4.5-8
Sun
Full Sun
Days to Maturity
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Score Protea on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether protea actually takes — and those shift from one yard to the next. Enter your address and we'll score protea against your land's real conditions.
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What Protea is
Protea grows as a perennial and reaches around five feet at maturity. It blooms in summer. It's also deer-resistant.
How to grow Protea
Protea grows in USDA zones 9 through 11. Protea does best in full sun — at least 6 hours of direct sun a day — and soil from pH 4.5 to 8, on well-drained ground.
USDA Zones
9-11
USDA PHZM 2023
Soil pH
4.5 - 8
USDA PLANTS Database
Sun
Full 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
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 protea in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Protea prefers pH 4.5 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 protea blooms in the cool of the morning, just as they open, for the longest display.
Good to know
Good news for pet owners — protea isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Protea offers moderate value to bees and other pollinators.
Where Protea thrives
Protea is hardy across USDA zones 9 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 9–11·Where Protea growsOpen map →
On USDA hardiness-zone overlap, Protea can grow in these states:
See if Protea will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether protea 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 Protea in my zone?
Protea grows in USDA hardiness zones 9 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 Protea?
Most growers plant protea 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 Protea need?
Protea 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 Protea need?
Protea prefers soil pH 4.5 to 8, on well-drained ground (FAO ECOCROP). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Protea attract pollinators?
Yes — protea's flowers are a solid nectar source for native bees and hummingbirds.
Is Protea safe for pets?
Protea is not known to be toxic to dogs or cats based on available data. Always supervise pets around new plantings. (Source: ASPCA.)