One bunch of foliage in each hand. Hold it right down at the base of the stems and then pull the clump apart very gently. ... Just do it slowly and carefully so the stems don't break off. I do this all the time to get double yield from bought annuals.

Is spreading lobelia a perennial?

Lobelia is a genus of about 370 species of annuals, perennials (even some aquatics) and shrubs. They are all basically perennials, but some are treated as annuals. In their native habitat they may be found along riverbanks, wet meadows, marshes, woodlands, mountain slopes and deserts.

Do lobelia come back year after year?

Lobelia in winter will die back no matter which variety you have. However, the annual Lobelia may not come back at all even if it formed seed. ... The annual forms tend to get weedy when temperatures get hot in summer but can be rejuvenated by cutting the plants back by half.