I start mine in the early spring inside before the first frost. I think I started in Marchish. I put 2 or 3 seeds in a peat type container and it seems like it took them forever to sprout. But, they did finally. I put them out after cutting off the bottom of the containers, after the danger of frost had passed. They were about 4-5 inches tall. They reached about 3 feet this year which I was amazed for a first year plant.
Loving Monarchs in central Ohio
CERTIFIED MONARCH WAYSTATION #144