After learning the hard
way that, no, mulberries really don't fruit much if half-pollarded
each year, I
regressed to the absolute opposite technique --- ignore the tree and
see what happens. The result? Our tree is loaded with fruits this year.
The downside of the
leave-the-tree-alone technique is that I can't actually reach most of
those berries. And since we chose an Illinois Everbearing tree (which
ripens fruits slowly over multiple months), the techique of shaking the
tree isn't really worth it. So the wild birds are getting most of the
crop.
I think pruning/training
experiment #3 will be pulling the limbs down into an open-center system like we did with our peach
trees. Maybe the tree will still bear heavily and I'll still be able to
reach the fruit? Only time will tell.
Anna, I grew up on a fruit farm, tender fruit. The trees were huge, and very little of the fruit could be reached from a standing position on the ground. I am old, and this was common in my youth, all the farms had tall fruit trees, cherry, peach, pear, apple. I spent my summers picking tender fruit.
We used ladders, and picked the fruit into baskets hanging on harnesses that we wore. One became an "expert" at placing ladders securely, climbing to postions that freed both hands for picking, balancing at high heights with a heavy load of fruit, and negotiating descent with the heavy load.
Ladders work well for traditional fruit trees. Handling ladders is inconvenient, but very effective, and we harvested fruit up to 20 feet from the ground.