Monardia

Monarda can look really ratty after flowering. It is susceptible to mildew. So cutting back will regenerate new growth. Keep in mind the plants will need adequate moisture for re-blooming. If they are dry expect little or no new growth.

Dennis - Johnson County Extension

Yes, it will rebloom, but not as much as the first flush of blooms. It might be getting tall and floppy too, so go ahead and cut it back by about a third, not just the spent blooms, but the whole plant. You'll get more blooms this season.

Monarda is another plant that beneits a lot from cutting back before it blooms. When I had it, I cut it back two or three times early in the season and stopped cutting it back around mid-June. Then I just let it do its thing and bloom.

If you don't want it self-seeding all over your garden, remove the last round of spent blooms before they go to seed. In fact, removing your current spent blooms will prevent hundreds of unwanted seedlings sprouting all over your garden. Monarda is one of those plants that just keeps on giving, and not always in a good way!