Lobelia should delight your garden with beautiful blooms about mid-summer, continuing on up to the first frost. Although not necessary, you can deadhead lobelia plants to maintain a neat appearance.

What month does lobelia flower?

Flowers: Masses of tiny 2-lipped flowers in shades of blue white, pink, red and purple (depending on variety). Flowering Period: Mid-summer to early autumn (May to October). Soil: Moist but well-drained, fertile soil. Sand or loam.

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.