The Q&A Archives: Lobelia Drying Up

Question: I have Lobelia planted since May and it was doing fantastic. Then some dried up . Was wondering if it has to be cut back, disposed of, or what. I was under the impression that it lasted all growing season. I am very upset as it looked spectacular in my window boxes. Any information as to what might have happened would be helpful. Some in the same location are doing great and some are just gone. Thank you and I will be waiting for a reply.

Answer: The annual trailing lobelias do best in morning sun or dappled light all day because, once the weather heats up, they tend to die off in protest. This may be what caused yours to dry up, combined with the fact that some may be better rooted than others. The best rooted plants will withstand the heat better. It is also important to keep the soil evenly moist (not sopping wet) to help them through the heat. In the fall they perk back up again, too.

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