Geranium is grown for its blooms, which open from spring through fall. It's hardy across USDA zones 10 through 11 and shrugs off deer. Its flowers are a moderate draw for honeybees and butterflies.
Geranium — the short answer
Geranium: grown in zones 10–11, part sun, about 95 days to maturity.
- USDA zones
- 10–11
- 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
- Sun
- Part Sun
- Growable Ground Plant Database
- Days to Maturity
- 95 days
- 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 Geranium on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether geranium actually takes — and those shift from one yard to the next. Enter your address and we'll score geranium against your land's real conditions.
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
See Geranium
What Geranium is
Geranium reaches around a foot and a half at maturity. It blooms from spring through fall. It's also deer-resistant.
How to grow Geranium
Geranium grows in USDA zones 10 through 11. Geranium does best in part sun — at least 4 hours of direct sun a day, on well-drained ground. It needs around 1,000 growing degree days to mature, which is why climate matters as much as soil.
USDA Zones
10-11
USDA PHZM 2023
Soil pH
Data pending
Sun
Part Sun
Growable Ground plant catalog
Drainage
well (dry spells)
Growable Ground plant catalog
Days to Maturity
95 days
Growable Ground plant catalog
GDD Required
1000+
Growing degree-days of accumulated warmth it needs to mature — humid summers reach this faster than cool coastal ones.
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 geranium in part sun with at least 4 hours of direct sun.
Match the soil
Pull a soil test from your local Extension lab to confirm pH and drainage match geranium's needs before planting.
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 geranium blooms in the cool of the morning, just as they open, for the longest display.
Where Geranium thrives
Geranium is hardy across USDA zones 10 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 10–11 spans average winter lows from 30°F to 50°F (USDA PHZM 2023). Across the 50 states and DC, that band covers none outright but splits 8 down the middle — and which side of that line your land sits on changes the answer.
Zones 10–11·Where Geranium growsOpen map →
Where Geranium stands, state by state
Geranium is rated for zones 10–11 — a cold floor USDA puts at 30 to 40°F. Across the 50 states and DC, 0 sit fully inside that band, the line runs through 8 more, and 43 sit outside it — and inside every split state, the same line runs on at county grain.
The line runs through
8 states
- California · zones 4b-11a
- Nevada · zones 4a-10a
- Arizona · zones 5b-10b
3 of 8 shown
Geranium’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.
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 Geranium
Growing guides for geranium
In rotation planning, geranium 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)
Related plants in annual flower
Good to know
One caution for pet owners — geranium is toxic to dogs and cats (mild severity). Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: ASPCA.)
Geranium offers moderate value to bees and other pollinators. (Source: Pollinator Partnership.)
Your land is one point inside Geranium'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 Geranium will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether geranium 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.
25+ data sources analyzed in seconds
How we know this about Geranium
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 Geranium in my zone?
Geranium grows in USDA hardiness zones 10 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 Geranium?
Time geranium 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.
How much sun does Geranium need?
Geranium 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 Geranium need?
Specific pH data for geranium is pending. It prefers well-drained ground. A soil test from your local Extension lab confirms what your site needs.
Does Geranium attract pollinators?
Yes — geranium's flowers are a solid nectar source for honeybees and butterflies. (Source: Pollinator Partnership.)
Is Geranium safe for pets?
Geranium is toxic to pets (dogs,cats) with mild severity. Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: ASPCA.)