Answer: Heat stress has a lot to do with lack of flowers with your dianthus. They prefer cooler temperatures so they will bloom best in the spring and again in the fall. Since they bloom on new growth you can cut the plants back by half after their first flush of blooms and that may prompt a second flush of blooms. As long as you cut them back after each bloom cycle you can probably coax them into at least some blooms during the summer months. But don't expect fantastic flowering while the weather is hot.
Q&A Library Searching Tips