Photo by Melody

PlantFiles: Mountain Sandwort
Arenaria montana 'Avalanche'

Family: Caryophyllaceae (kar-ree-oh-fil-AY-see-ee) (Info)
Genus: Arenaria (ar-en-AR-ee-uh) (Info)
Species: montana (MON-tah-nuh) (Info)
Cultivar: Avalanche

Alpines and Rock Gardens

under 6 in. (15 cm)

3-6 in. (7-15 cm)

USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:
Full Sun

Unknown - Tell us

Bloom Color:
White/Near White

Bloom Time:
Mid Spring
Mid Summer

Grown for foliage

Other details:
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Unknown - Tell us

Propagation Methods:
From seed; sow indoors before last frost

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds

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Thumbnail #1 of Arenaria montana by busy_bee_or

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Thumbnail #3 of Arenaria montana by flowerfrenzy

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Thumbnail #5 of Arenaria montana by Samtpfote


2 positives
No neutrals
No negatives

Gardeners' Notes:

Positive Samtpfote On May 27, 2010, Samtpfote from Gresham, OR (Zone 8a) wrote:

I love this plant. After beeing in my garden for a year it is app. 10 times its size without beeing invasive. At this moment (end of may) it is covered with tons of white flowers that lasts all summer long. Although it is suggested to plant this flower in morning sun only, mine gets mostly afternoon sun and is still growing well.

Positive flowerfrenzy On Apr 17, 2006, flowerfrenzy from Vancouver, WA (Zone 7a) wrote:

I love this plant! The blooms are many, tiny and perfect! It tripled itself in my garden in less than 2 months, yet doesn't seem to be invasive. I think it's an excellent alternative to "Snow in Summer", which can be invasive.


This plant has been said to grow in the following regions:

Gresham, Oregon
West Chester, Pennsylvania
Fircrest, Washington
Vancouver, Washington

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