Genus guide
Lobelia — 10 species
Part of the Bellflowers & lobelias family (Campanulaceae)
Lobelia is a diverse genus ranging from low-growing edging annuals like 'Crystal Palace' and Edging Lobelia to tall native perennials such as Lobelia cardinalis (cardinal flower) and Lobelia siphilitica (great blue lobelia). Compact varieties thrive in full sun to part shade; taller perennial species prefer consistently moist to wet soil and tolerate light shade, especially in warmer regions. Cardinal flower in particular requires reliably moist soil and never tolerates drought. All Lobelia species are toxic to cats and dogs, containing lobeline alkaloids that cause vomiting, excessive salivation, and heart rhythm disturbances.
All Lobelia species we cover
- Cascade White Trailing Lobelia
- Crystal Palace lobelia
- Crystal Palace Lobelia
- Edging lobelia
- Lobelia cardinalis
- Lobelia erinus 'Cascade Blue'
- Lobelia erinus 'Riviera Lilac'
- Lobelia erinus 'Techno Heat Blue'
- Lobelia siphilitica
- Pale-Spike Lobelia
Lobelia — frequently asked questions
Are Lobelia plants toxic to cats and dogs?
Most Lobelia are not pet-safe. Of the 10 Lobelia species in the Growli library, 10 (100%) carry a toxic or mildly-toxic ASPCA classification and 0 are pet-safe. Always confirm the exact species on its pet-safety page before trusting it around cats or dogs.
How much light do Lobelia plants need?
Most Lobelia do best in bright indirect light. If yours stretches toward the window or loses its variegation it wants more light; scorched or bleached leaves mean it is getting too much direct sun.
Are Lobelia easy to care for?
Lobelia are moderate to grow: the main requirement is a genuinely bright spot out of harsh midday sun. Get the light right and the rest of their care follows.
How many Lobelia varieties are there?
Growli's care library covers 10 Lobelia species and varieties — browse them all above. They share a similar light, water and soil pattern, so once you learn one Lobelia, the rest follow closely.
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