August is time to multiply perennial flowers
According the Becker County Master Gardeners, August is the time to constantly pick ripe and oversize produce from your gardens to minimize yellow jacket (wasp) activity and to encourage plants to remain productive as long as possible. Remove fallen fruit as well, before it begins to ferment.
Yellow jackets usually aren’t aggressive, provided you don’t swat at them or disturb them. They’re attracted to soda and other drinks, so be very careful when you drink from a can you’ve set down for a while.
Late August through early September is an ideal time to add flowering perennials to your garden, whether you buy them or use divisions from your own or your neighbor’s plants. Make sure there are two or three weeks of decent growing conditions expected after planting.