Do Montauk Daisies grow oaky near walnut trees?

Question

I have numerous flower beds scattered among numerous walnut trees

Answer 1

You can try, but there are potential obstacles for plant health under these conditions:
1. shade
2. competition for water and nutrients
3. allelopathy (toxicity from substance in walnut for other plants.
https://www.gardeningknowhow.com/garden-how-to/info/allelopathic-plants.htm