Spine Acanthus

Acanthus spinosus

Native to:
Albania, Bulgaria, East Aegean Is., Greece, Italy, Kriti, NW. Balkan Pen., Türkiye

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Acanthaceae
Genus:
Acanthus
Species:
Acanthus spinosus
USDA Symbol:
ACSP7

Growth Characteristics

Height:
150 cm
Light Requirements:
Full Sun
Drought Tolerance:
Medium
Bloom Months:
may,jun,jul,aug
Bloom Colors:
white, purple

Garden & Ecology Notes

Wildlife Value:
bees, butterflies
Deer Resistant:
Yes

Soil Requirements

Soil Type:
rich, well-drained loamy soil
pH:
6.0 - 7.5 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
Prefers calcareous soils in native habitat

Propagation & Germination

Stratification:
Cold/moist stratification required — 30–60 days
Germination Time:
21–90 days
Notes:
Germination can be erratic and slow. Fresh seed germinates better than stored seed. Keep soil consistently moist during germination period.

ORGHPS Germination Guide: Sow @ 4C. Requires soaking 24-48 hrs; discard floaters.

Source: Ontario Rock Garden & Hardy Plant Society