Sorry but we don't have information as to what plants are sold at what retail outlets. The Collie Mullens variety is grown by Monrovia growers. You might have success finding it by checking out the following web site. It has a box for you to enter your zip code and will then give you a list of local retailers that carry Monrovia plants:
Thanks for the question. Please stop in again soon!
Q&A Library Searching Tips