Aesclepias is a tough one no matter what. Some folks can force cuttings out of seasons, but I suspect they are imitating conditions. Mine get tough love. I rooted a wild mustang grape once, outside, layered in the top of a pot. I had no roots form til summer heat dried up the area. The pot had water, and I would swear that grape was surviving off the water in the pot and every grape was sweet. As fall dormancies hit, I cut the vine away from the parent and it is doing well to this day. It dropped leaves while rooting, but that year the trees were even dropping limbs to survive. Some things take longer than others. Dont give up- bare branches can return in favorable season.
