Oypetalum coeruleum

Oxypetalum coeruleum

Native to:
Brazil, Uruguay

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Apocynaceae
Genus:
Oxypetalum
Species:
Oxypetalum coeruleum
USDA Symbol:
OXCO14

Growth Characteristics

Height:
100 cm
Light Requirements:
Full Sun
Drought Tolerance:
Low
Bloom Months:
jun,jul,aug,sep,oct
Bloom Colors:
blue, turquoise

Host Plant for Caterpillars

⚠️Monarch butterfly (Danaus plexippus)

Garden & Ecology Notes

Wildlife Value:
butterflies, bees
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:
native to regions with well-drained soils

Propagation & Germination

Stratification:
None required
Germination Time:
14–30 days
Notes:
Seeds require light for germination; sow on surface and do not cover. Best germinated at warm temperatures around 70-75°F.

The above propagation data sourced from Claude AI

ORGHPS Germination Guide: Sow @ 20C. Germinates within 3 months.

Source: Ontario Rock Garden & Hardy Plant Society