We've had our willow tree for 2 years so I'm not sure how old it is. It came from Home Depot in a 2 gallon pot. Any how we didn't know to prune it when it was newly planted and now it seems to need a major pruning. I read on another site that you should stake the "leader" branch to a pole and train it upright when it's young, we didn't do that.. The "leader" branch is now bending down at the top, is this normal or can we do something to correct this. The tree appears to be flat on top, everything is bending down, there is no upward growth at all. We've trimmed it twice this summer, it's all over the ground, nothing growing upward.