cutting back an upright juniper bush

Question

When is it time to cut back a juniper bush, and how far back can they be cut?

Answer 1

You can prune Junipers anytime, but avoid during freezing periods.
Early spring, just before active growth starts is a great time to shape the shrubs up for the year.
Clean up dead and damaged parts of the plant.
You can cut out center branches to open up the plant.
Cut the branches to an active growing twig.
Shorten side branches about 1/4 to 1/3 of their length.

https://www.gardeningknowhow.com/ornamental/shrubs/juniper/care-of-junipers.htm