Penstemon is grown for its blooms, which open in summer. Notably, it shrugs off deer and shrugs off dry spells. Its summer flowers are a real draw for native bees, butterflies, and hummingbirds.
Score Penstemon on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether penstemon actually takes — and those shift from one yard to the next. Enter your address and we'll score penstemon against your land's real conditions.
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What Penstemon is
Penstemon reaches around four feet at maturity. It blooms in summer. It's also deer-resistant.
How to grow Penstemon
USDA Zones
Data pending
Soil pH
Data pending
Sun
Data pending
Drainage
Data pending
Mature Height
4 ft
Growable Ground plant catalog
Start the season right
Plant penstemon in full sun.
Match the soil
Pull a soil test from your local Extension lab to confirm pH and drainage match penstemon's needs before planting.
Water while it roots in
Water deeply while penstemon establishes, letting the soil dry between soakings; once its roots are in, it rides out dry spells on its own.
Harvest at its peak
Cut penstemon blooms in the cool of the morning, just as they open, for the longest display.
Where Penstemon thrives
Whether penstemon thrives on a given site comes down to its soil pH, drainage, sun, and frost dates — the conditions that vary parcel to parcel.
What grows around Penstemon
Growing guides for penstemon
Related plants in perennial flower
Good to know
Penstemon is a standout pollinator plant — high value to bees and other pollinators. (Source: Xerces Society.)
Your land is one point inside Penstemon'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 Penstemon will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether penstemon 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 Penstemon
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•ASPCA
Frequently asked questions
Can I grow Penstemon in my zone?
Zone data for penstemon is being finalized. A Growable Ground report checks your parcel's full suitability against federal soil, climate, and zone data.
When should you plant Penstemon?
Time penstemon 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.
What soil does Penstemon need?
Specific pH data for penstemon is pending. A soil test from your local Extension lab confirms what your site needs.
Does Penstemon attract pollinators?
Yes — penstemon's flowers are a strong nectar and pollen source for native bees, butterflies, and hummingbirds. (Source: Xerces Society.)