String Of Pearls is grown for its foliage and the structure it brings to a planting. It's hardy across USDA zones 9 through 12, shrugs off deer, shrugs off dry spells, and grows just as well in a container as in the ground. Its summer flowers are a modest draw for honeybees.
Zones
9-12
pH Range
5.5-7
Sun
Part Sun
Days to Maturity
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What String Of Pearls is
String Of Pearls grows as a perennial and reaches around 6 inches at maturity. It blooms white in summer. It's also deer-resistant and well suited to containers.
How to grow String Of Pearls
String Of Pearls grows in USDA zones 9 through 12. String Of Pearls does best in part sun — at least 4 hours of direct sun a day — and soil from pH 5.5 to 7, on well-drained ground.
USDA Zones
9-12
USDA PHZM 2023
Soil pH
5.5 - 7
USDA PLANTS Database
Sun
Part Sun
Growable Ground plant catalog
Drainage
well (dry spells)
Growable Ground plant catalog
Mature Height
0.5 ft
Growable Ground plant catalog
Start the season right
Plant string of pearls in part sun with at least 4 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
String Of Pearls prefers pH 5.5 to 7 (Growable Ground Plant 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.
Keep it in good form
Prune string of pearls to shape as it grows; the reward is its foliage and structure, not a harvest, so steady upkeep is the whole job.
Good to know
One caution for pet owners — string of pearls is toxic to dogs and cats (moderate severity). Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: ASPCA.)
String Of Pearls offers low value to bees and other pollinators.
Where String Of Pearls thrives
String Of Pearls is hardy across USDA zones 9 through 12. 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 9–12·Where String Of Pearls growsOpen map →
On USDA hardiness-zone overlap, String Of Pearls can grow in these states:
See if String Of Pearls will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether string of pearls actually takes — we score it against the real conditions at your address.
Three things about your exact spot that zone averages miss:
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Frequently Asked Questions
Can I grow String Of Pearls in my zone?
String Of Pearls grows in USDA hardiness zones 9 through 12 (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 String Of Pearls?
Most growers plant string of pearls 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 String Of Pearls need?
String Of Pearls 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 String Of Pearls need?
String Of Pearls prefers soil pH 5.5 to 7, on well-drained ground (Growable Ground Plant Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does String Of Pearls attract pollinators?
Yes — string of pearls's flowers are a modest nectar source for honeybees.
Is String Of Pearls safe for pets?
String Of Pearls is toxic to pets (dogs,cats) with moderate severity. Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: ASPCA.)