Q.How Go Make A Weeping Willow Bonsai Weep Instead Of Growing Straight Up.
I have 6 little bonsai weeping willow trees I made from cutting two years ago. They are very healthy, but they don’t weep. The branches go straight up. It looks funny.
Certified GKH Gardening Expert
As long as you took cuttings from weeping branches and not a grafted bottom sucker, it should weep with proper care.
Your symptoms will be caused by, only, a handful of things. If the cutting was taken from a sucker of a grafted tree, then it will not be the same species as the top. This can account for a non-weeping tree.
Other factors include proper care. They grow very , very fast. If it has been that long in container, and has not grown much, then environmental factors may be to blame. Root pruning is necessary, annually, for a bonsai specimen to remain healthy.
Here are some articles for more information:
https://www.gardeningknowhow.com/ornamental/trees/tgen/growing-trees-in-containers.htm
https://www.gardeningknowhow.com/ornamental/trees/willow/grow-a-willow-tree.htm