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Photos are representative and may not match your specific variety.
Great Blue Lobelia
Native wildflower
Native wildflowerLobelia siphilitica
- Partial sun
- Zones 4–9
- 60 days to maturity
- Flowers
- 12" spacing
- High water
- Perennial
Overview
Great Blue Lobelia (Lobelia siphilitica) is a perennial native wildflower. Hardy in USDA zones 4 to 9. Prefers full sun.
Planting
Start indoors 6-8 weeks before last frost, or direct sow in spring after last frost. Seeds need light to germinate; press lightly onto soil surface.
Growing
Sun: partial. Water: high. Soil: Moist, well-drained soil; tolerates slightly acidic to neutral pH. Space plants 12" apart. Germination: 10-15 days.
Pests & diseases
Common pests: Spider mites, aphids, slugs. Common diseases: Powdery mildew, root rot in poorly drained soil.