Lobelia. Add lobelias to shade gardens for rich, true blues. ... Annual lobelia is a cool-season plant that can tolerate most light conditions, including shade.

Will lobelia grow in shade?

Perennial lobelia

Lobelia cardinalis can be grown in sun or, preferably, partial shade. It needs a good, fertile soil that remains moist during summer, and doesn't dry out.

How do you keep lobelia looking good?

Give the plant a light trim with a pair of scissors when it needs a bit of tidying. This includes trimming to remove spent blossoms. For spiky types, wait until the entire spike has faded before clipping out the stems. Cut back the plant by half or more at the end of its bloom period.