Q.winter gem boxwood plants
Just ordered boxwood plants. They are very young, about 10 inches high and narrow. I wanted them to grow around fountain no higher than 10 inches but wider to fill in where they were planted. When can I shape them, cut the tops so they grow wider? I want to keep them short and full. Please help.

This cultivator of Boxwood are excellent for small hedges.
They have a moderate growth rate and have a nice dense evergreen growth.
Keep a regular watering and fertilizing schedule the first season to encourage good strong root systems in the plants.
Let the new plantings become established and growing well before beginning to prune. Pruning can be done any time of year, but avoid in the fall.
https://www.gardeningknowhow.com/ornamental/shrubs/boxwood/trimming-boxwood-bushes.htm