Can you grow zinnia flowers surrounded by muck? ...

How do I hang on to someone else's...
Answers:    You can add aged or composted stimulant into the soil in their flower bed, but fresh manure can be too strong & might injure your plants. Fresh manure can burn their roots.

When the mess is fresh, it also can contain some viable weed seeds that can lug over a garden. So letting manure compost & age first make a lot of sense.
Why do society speak they planted a veggie...
it's not other recomended but you can mix potting soil and manure next to the existing soil to make it look nice and preserve harm to your plants and make the addition of a few earthworms to your garden it really helps