By July 15th, many of my plants have gone to seed and are done blooming. Most people would just let these plants keep growing and just taking up garden space. I choose to cut most of these down to the ground. The advantage is that they will come back and re-bloom and look very nice for a late summer season. Now this is not true for every plant, but for many I grow it is true. Maltese Cross, Salvia, Dianthus, Veronica and others will all give me a 2nd and sometimes a 3rd bloom. You can give them an extra boost of fertilizer, Miracle Gro or compost if you think they need it.
Some plants which don’t re-bloom, like Penstemon, I cut off the seed stalks so that I can get more sun onto the remaining plants.
Any plants that are diseased or don’t appear to be doing well are dug up and pitched.
I also use this time to fill-in with plants that I may have dug up from other spots.
You can also plant some annuals, like Zinnia, to fill-in some of these areas.