Answer: This azalea is only considered hardy into zone 8 so it is pretty certain it would not survive for you in Silver Spring. To find it you would need to contact retailers in zone 8. So you would be looking at the southern part of coastal North Carolina, eastern half of South Carolina, and so on moving south. As you can see, that is a substantially warmer climate than Maryland. Monrovia plants are sold nationwide by independent stores so unfortunately I do not have a list of which retailers might have it in stock or could obtain it for you. There is a zip code based dealer locator at the web site to help with contact information if you want to try to locate some.
I'm sorry I can't be more encouraging.
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