English walnut for hugel

Hi folks! Hoping someone can help. I have just started reading about hugelkultur and I'm 100% on board since there's an abundance of walnut wood, and some cherry wood in my yard. I am almost positive it is English walnut, not black walnut since the leaves are fatter,  shinier and not as pointy. Has anyone used primarily English walnut for a hugel? I had some healthy looking volunteer tomatos spring up from underneath a couple of the walnut rounds next to the garden last year so it can't be too bad... Any tips are great, thanks!

You have Persian walnuts ? You are very lucky as they are the most wonderful productive tree that will produce an increasing amount  of nuts every year and all you have to do is pick them up . I have eight trees and love them .
I also grow blackcurrent and black berries underneath .
Apart from thinning them and using that wood in a hugel as it rots I suspect any allopathic effect may be muted
After a couple of hundred years these trees will be worth a lot as the wood is in great demand for carving furniture laminates etc are you sure you want to cut them down
David

Ps current price for walnuts in shell is about 5euro a kilo :-) plus if certified organic ,28 euro a kilo kernels organic !