what color should ripe bur oak acorns be? I know other acorns are dark, but all the pictures i have seen of bur's have been green. Mine are green and yellow. Are they ripe? Will they ripen?
I would determine ripeness by ease of hull removal rather than color. I know they are at times hard to get off of a bur. It should not still be grown together at the top. I have grown many other oaks but only a handful of burs.
It is a numbers game so don't plan on planting 3 or 4. Start more and cull from there.