Great Blue Lobelia
Lobelia siphilitica
Family: Campanulaceae
Great Blue Lobelia grows in full sun to partial shade and prefers moist, rich soil. Water needs: Moderate to high.
How to Grow Great Blue Lobelia
Great Blue Lobelia growing information includes sunlight requirements of Full sun to partial shade, soil conditions listed as Moist, rich soil with a soil pH of 5.5-7.0, and Moderate to high water needs. The listed hardiness zones are 4-9. For propagation reference, the database lists germination or establishment information for Great Blue Lobelia as 14-30 days, with planting or establishment depth listed as Surface sow. Days to maturity are listed as 1-2 years.
Plant Overview
Great Blue Lobelia (Lobelia siphilitica) is listed in the Campanulaceae family and categorized as a flower with a perennial life cycle. This profile summarizes growing information for hardiness, light, soil, water, seed starting, maturity, and other available cultivation details. Difficulty is listed as Moderate.
- Plant ID
- PLT-0347
- Family
- Campanulaceae
- Plant type
- Flower
- Life cycle
- Perennial
- Difficulty
- Moderate
Growing Conditions
Great Blue Lobelia is listed for full sun to partial shade conditions. Water needs are listed as moderate to high. The database soil reference is Moist, rich soil. The listed soil pH range is 5.5-7.0, and the listed hardiness range is 4-9.
- Hardiness zones
- 4-9
- Sunlight
- Full sun to partial shade
- Soil
- Moist, rich soil
- Soil pH
- 5.5-7.0
- Water needs
- Moderate to high
Seed & Germination
For seed starting, the listed germination time is 14-30 days and the seed depth is Surface sow. The listed time to maturity is 1-2 years. Use these values as general reference points and adjust for local climate, seed source, and growing conditions.
- Germination
- 14-30 days
- Seed depth
- Surface sow
Harvest & Propagation
- Days to maturity
- 1-2 years
Related Plants
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Growing Reference Note
Plant performance can vary with climate, soil, weather, cultivar, seed quality, and gardening methods. The values on this page are general database reference ranges rather than a substitute for local extension guidance or seed-packet instructions.