Aster is a perennial grown for its blooms, which open in summer and return year after year. It's hardy across USDA zones 4 through 8 and shrugs off deer. Its summer flowers are a real draw for honeybees, native bees, butterflies, and moths.
Zones
4-8
pH Range
5.5-8
Sun
Part Sun
Days to Maturity
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Score Aster on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether aster actually takes — and those shift from one yard to the next. Enter your address and we'll score aster against your land's real conditions.
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What Aster is
Aster grows as a perennial and reaches around five feet at maturity. It blooms in summer. It's also deer-resistant.
How to grow Aster
Aster grows in USDA zones 4 through 8. Aster does best in part sun — at least 4 hours of direct sun a day — and soil from pH 5.5 to 8, on well-drained ground.
USDA Zones
4-8
USDA PHZM 2023
Soil pH
5.5 - 8
USDA PLANTS Database
Sun
Part Sun
plant_species_v5.csv
Drainage
well (dry spells)
plant_species_v5.csv
Frost Tolerance
50°F
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 aster in part sun with at least 4 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Aster prefers pH 5.5 to 8 (USDA PLANTS Database). 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 aster blooms in the cool of the morning, just as they open, for the longest display.
Good to know
Good news for pet owners — aster isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Aster is a standout pollinator plant — high value to bees and other pollinators. (Source: Xerces Society, Pollinator Partnership.)
Where Aster thrives
Aster is hardy across USDA zones 4 through 8. 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 4–8·Where Aster growsOpen map →
On USDA hardiness-zone overlap, Aster can grow in these states:
See if Aster will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether aster 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 Aster in my zone?
Aster grows in USDA hardiness zones 4 through 8 (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 Aster?
Most growers plant aster 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 Aster need?
Aster 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 Aster need?
Aster prefers soil pH 5.5 to 8, on well-drained ground (USDA PLANTS Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Aster attract pollinators?
Yes — aster's flowers are a strong nectar and pollen source for honeybees, native bees, butterflies, and moths (Xerces Society, Pollinator Partnership).
Is Aster safe for pets?
Aster is not known to be toxic to dogs or cats based on available data (ASPCA). Always supervise pets around new plantings.