Hey all, it's been a while since I've been to this site. I had some time to browse the topics and decided to post a question to you all.
I am an asclepias afficionado. I have grown from seed the following asclepias: curassavica, verticillata, incarnata and physocarpus. The seeds were all collected from plants I also grew from seed. All have grown well and have become very large. The physocarpus grew to 8 feet, and the curassavicas to almost 6 feet. They bloomed profusely throughout the summer. The incarnatas and verticillatas were two years old this past summer and did not bloom. I moved here from Boston a year ago where I grew them and they bloomed often. The seed I had started in Boston and moved them to NC with me. I am trying to figure out why they didn't bloom. I planted some in my mother-in-laws yard where The light levels are similar but the soil is very moist and sandy. I have ammended clay soil. Could that alone prevented the verticillata and incarnatas from blooming? If so, then how is it the more tender asclepias bloomed so well?
The one great thing is the plants were a virtual buffet for monarch catepillars!!!! I had sooo many this summer.
Looking forward to reading your replies!