I have several walnut trees in my yard, and this year I am going to make compost for the first time in my life, and would like to know whether I should include walnut leaves in my compost pile.
There are contradictory opinions on this matter on the internet.
Yes, you can - if your trees are black walnut, the leaves will have a higher content of juglone, but it will break down as it composts over time and won't be an issue. The juglone disappears quicker if you shred the leaves prior to composting, so maybe run the mower over them first if you can. https://laidbackgardener.blog/2015/10/15/yes-you-can-compost-black-walnut-leaves/
If you have lots of leaves, its better to compost them separately rather than just piling them all in the compost heap, This Q and A might be of interest regarding that What is the best way to compost a large pile of leaves with minimal effort?
