Timing for Cutting Back Milkweed?

I included some milkweed this year in a planter I maintain across from my house in Seaton Village, Toronto. It’s looking quite yellow and sad now (mid-October), and I’m wondering if the monarch butterflies still need it this late in…

Common Milk Weed

I am located in southern Ontario zone 6a (or 6b not sure) and I am planting a cottage/pollinator garden. Last year I planted two different varieties of milk weed, an orange variety and a white blossomed one. My question is,…