Horse chestnut seeds

Question

I gathered some conkers in 1976, forty years ago. I still have them and would love for them to grow, is it too late?

Answer 1

Seed is planted when it is fresh. Dried out they are not likely viable seeds.

https://www.gardeningknowhow.com/ornamental/trees/horse-chestnut/how-to-grow-a-horse-chestnut-tree.htm