I have very healthy lilies, which are in bloom right now. Is there any way in which I could force a second blooming before the summer is out? Thank you.
You can try deadheading. It is sometimes successful with lilies. As soon as the flower fades on the plant, remove it from the plant. The plant's main goal is to produce seeds, so if you remove the faded flower (which would have resulted in a seed pod), this can sometimes force the plant to bloom again in an attempt to produce seeds. Even if it does not bloom again this year, removing the faded flowers will cause the plant to produce bigger blooms next year. So it is a win-win situation.