Allium tolmiei var. persimile
Allium tolmiei var. persimile var. persimile
This rare variety of Tolmie's onion is endemic to Idaho and thrives in rocky, well-drained soils with partial shade to full sun. Water consistently during spring while the plant is actively growing, then ease off as leaves yellow and the plant enters summer dormancy. It is best suited to native plant collections, rock gardens, or wildflower meadows in cooler climates.
Care Level
Moderate
Sun
Partial Shade
Water
Moderate
Growth Rate
Fast
Mature Height
12″ – 48″
Soil
loam
Life Cycle
Perennial
Spacing
6″
Flowers
red
Watering Schedule
Every 7-10 Days During Active Growth; Reduce After Foliage Dies Back • Water Moderately Until Soil Is Evenly Moist; Allow Top Inch To Dry Between Waterings
Soil pH
6 – 8
Temperature
-40° – 95°F
Mature Spread
up to 36″
Root Depth
Medium
Foliage
Medium
Native to
Attracts
Sources
Data: trefle, usda
No nurseries currently have this species in stock.