2024 May 28 The Chelsea Chop
Monarch caterpillars like to chomp on the freshest, newest leaves of the Milkweed Asclepias sp. plants. When we raised Monarchs last year, we read online forums that told us to chop our plants early in the season to encourage branching and fresh leaves. It was hard for us to imagine hacking our plants. However, after seeing what the caterpillars do to the plants, I can see that Milkweed is used to being devoured and cut all the way back to the stems even. It’s part of their symbiotic relationship. They evolved being eaten by the caterpillars.
Apparently lots of gardeners have known about pruning their perennials in half at this time of year. The “Chelsea Chop” is common around the time of the Chelsea Flower Show. I don’t know about the flower show, but I did do a few cuts around the garden, mostly on my Milkweeds and my Maximillian Sunflower Helianthus Maximillani. The sunflowers get like nine feet tall and flop all over. Maybe this year they will bush up a bit. We’ll see.
I learned you can Chelsea Chop all kinds of species, but it’s important to check the species if you’re unfamiliar. It’s worth a quick Google search. Certain plants don’t branch when chopped, like Gayfeather Liatris Spicata. I might do my Phlox Phlox divaricata tonight too, but it’s hard to cut off a plant that is almost in bloom!




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