Edible plants around house...do anything differently?

Thanks for all the help recently. Today, I was looking at a home with what I identified as a Rosemary plant in the front, and I noticed this bed pictured. I don’t know exactly what these are, but I wanted to ask if I should treat this any differently when doing the house wash. Pre and post water, is it enough? Just curious because obviously these things are eaten
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Probably lay a tarp over them (esp. with those cages to support it) during the wash and initial rinse even maybe. Them being elevated the runoff should go downhill from them.

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Yes please, use a light colored tarp. I just recently ‘killed’ a tree because I didn’t wash the gutters correctly.