I'd talked briefly with Donna, the property manager at 99 Kent Street, about possibly adding mulch, and she'd said that they might have some in piles somewhere. Apparently yesterday, she had her landscape crew lay it out along the entire garden for us. It's just what we needed to keep down the weeds and keep the soil from running away in the thunderstorms scheduled for tonight and today. Plus it looks nice, too. Not to mention that they were very careful in placing the mulch--not a single plant on the entire stretch was damaged.
So a big thanks to Donna and her crew!
(Here's a picture of the mulch, my son Noah, and our dog Comet)