One way to keep your tropical milkweed plants growing over the winter is to take cuttings in the fall, place them in some water. No – Diet Coke is not used. Over time they will root. I put mine down in the basement underneath some lights and fed them my miracle gro diluted solution. Here’s what the roots look like on February 1st.
I then transplanted them into some good potting soil. They will definitely be ready for spring.