5. Pinching
Some types of perennials such as salvias, phlox, chrysanthemums, and asters can benefit if they’re pinched back. When you pinch your plants back, they get busier and as a result are able to produce more blooms.
Pinching your plants back will also reduce the chances of them flopping over. Using your thumb and your forefinger, pinch back the growing tips of your plants a couple of times when you’re in late spring.
Bear in mind that not all perennials should be pinched. If you aren’t sure which ones can be pinched and which ones can’t, pinch slightly and see what happens. Another remedy to the issue of not knowing which perennials are suited to pinching is calling on an expert.
Professional gardeners have familiarized themselves with every species of plant, including perennials, so they’ll be able to give you all the guidance you need when it comes to pinching some members of your perennial garden.