The lobelia plant is an attractive annual herb with many varieties. It is an easy-to-grow, carefree plant that enjoys cool weather. This summertime bloomer will continue to produce flowers on up through the first frost. Growing lobelia is an asset to the garden as it will grow nearly anywhere. These plants typically require an area with full sun but will tolerate partial shade. They also prefer moist, rich soil. 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.