Lobelias are prolific blossoming plants with many different varieties and many different blossom colors. With proper care, lobelia plants will bloom throughout the entire summer. Most lobelia plants are low-growing, staying only several inches high. Because of the small stature of lobelia plants, many people use then in edgings, borders and containers. Keep your lobelias looking healthy and attractive by pruning them as necessary during the growing season.
Watch the lobelia plants as they begin to blossom during the growing season. Often, the lobelia plants seem to tire slightly in the middle of the summer. This is the time to perform pruning to re-energize the lobelia plants.
Trim off as much as half of each lobelia stem to give the plant new growing energy. Cut the stems at any point without concern about specific cutting location.
Fertilize the lobelia plants immediately after pruning. Mix the fertilizer with water according to package recommendations for the size of your growing area. Pour the fertilizer carefully in the soil around the lobelia plants without splashing fertilizer onto the foliage in the process.
Water the lobelia plants immediately after fertilizing to ensure that the fertilizer does not burn the plants.