Jade Frost Sea Holly
Eryngium planum
eh-RIN-jee-um PLAN-um
Perennials: Foliage
Zone
3: -40° to -30°
Min. Temp
Hardy: 28°
These plants are hairless, usually have spiny leaves with tight dome shaped umbels of flowers resembling thistles. They can tolerate hot, dry sites and soils high in salts.
Appearance
Summer Foliage
Blue-Green
Fall Foliage
Blue-Green
Flower Color
Blue
Blooming Time
Mid Summer - Fall
Habit
Upright
Height
2–3 ft
Spread
12–18 in
Form
Umbel
Characteristics
Type
Cultivar
Safety
Non-toxic
Growth Rate
Moderate
Tolerance/Resistance
Drought Tolerant
Attracts
Attracts Honeybees & Pollinators; Attracts Butterflies; Attracts Beneficial Insects
Uses/Placement
Cut Flower
Optimal Growing Conditions
Sun Exposure
Full Sun: 8-12 hrs
Soil Texture
Sandy
Soil Drainage
Well-drained
Soil Moisture
Dry to Average
Soil PH
Slightly Alkaline: 7.0-7.5
PH Tolerance
Prefers slightly alkaline soil
PH Correction
Low pH may cause nutrient toxicity
Soil Amendment(s)
Compost
Fertilizer
Light Feeder
Fertilizer Formula
Balanced Fertilizer
Fertilizer Timing
Early Spring
Micronutrients
Calcium (Ca)
Care
Care Level
Low
Behavior and Propagation
Spreading
Moderate Spreader
Propagation Method
Benefits from Pollinators
Propagation Licensing
Trademarked cultivar
Division Timing
Spring or Fall Division