Fireweed is grown for its blooms, which open in summer. Its summer flowers are a real draw for honeybees, native bees, and butterflies.
Zones
Data not available
pH Range
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Sun
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Days to Maturity
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Score Fireweed on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether fireweed actually takes — and those shift from one yard to the next. Enter your address and we'll score fireweed against your land's real conditions.
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What Fireweed is
Fireweed reaches around five feet at maturity. It blooms in summer.
How to grow Fireweed
USDA Zones
Data not available
USDA PHZM 2023
Soil pH
Data pending
USDA PLANTS Database
Sun
Data pending
plant_species_v5.csv
Drainage
Data pending
plant_species_v5.csv
Mature Height
5 ft
plant_species_v5.csv
Frost-Free Days
0+
plant_species_v5.csv
Start the season right
Plant fireweed in full sun, once the soil has warmed and frost risk has passed.
Match the soil
Pull a soil test from your local Extension lab to confirm pH and drainage match fireweed's needs before planting.
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 fireweed blooms in the cool of the morning, just as they open, for the longest display.
Good to know
Good news for pet owners — fireweed isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Fireweed is a standout pollinator plant — high value to bees and other pollinators. (Source: Xerces Society, Pollinator Partnership.)
Where Fireweed thrives
Whether fireweed thrives on a given site comes down to its soil pH, drainage, sun, and frost dates — the conditions that vary parcel to parcel.
See if Fireweed will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether fireweed 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 Fireweed in my zone?
Zone data for fireweed is being finalized. A Growable Ground report checks your parcel's full suitability against federal soil, climate, and zone data.
When should you plant Fireweed?
Most growers plant fireweed 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.
What soil does Fireweed need?
Specific pH data for fireweed is pending. A soil test from your local Extension lab confirms what your site needs.
Does Fireweed attract pollinators?
Yes — fireweed's flowers are a strong nectar and pollen source for honeybees, native bees, and butterflies (Xerces Society, Pollinator Partnership).
Is Fireweed safe for pets?
Fireweed is not known to be toxic to dogs or cats based on available data (ASPCA). Always supervise pets around new plantings.