I believe I have BLACK WALNUT growing. How long before I see flower/fruit? The age of tree, etc? Are they a self pollinating type tree? Thanks
Walnut Tree No Nuts
Certified GKH Gardening Expert
Black walnuts will not produce fruit and nuts until they are 10 years old. Black walnuts will sometimes self-pollinate, but this is inefficient, so more than one tree is required for optimal nut production.
Here is more about caring for black walnuts for nut production and other uses: