In your area, I would wait to prune them until Dec or Jan. Look up your local rose society - they all have pruning classes around the time local roses should be pruned.

Jackie

The rose in the second picture shows probable magnesium deficiency in the lower leaves. Try 1/4 cup epsom salts.

With any rose that is growing vigorously, you can take 1-3 feet of stem, or about half, whenever you remove a spent bloom. That will help, but in your climate I doubt you can keep these roses as short as you want. Maybe you should relocate them in the fall. Remove most of the foliage when transplanting.

I would submit that "Grandiflora" roses have habits (mostly) similar to hybrid teas, and want to grow tall and upright. Just my opinion.

Agree with michaelg's recommendation.

I agree with michaelg and diane_nj. I use dead-heading as a time to remove some of the leggy growth.

I agree with all the previous comments, and while you can prune to encourage a rose to bush out more, yours already look fairly nicely branched on the lower canes. Ch-ching does have that tall cane sprouting out, but it looks like they really want to bloom on higher bushes in your zone than the 3' you're targeting. Most hybrid teas prefer to bloom at 4-5' in warmer zones, and pruning them lower might get bushier branches but not necessarily blooms that stay at those heights. However, it's worth a try since you couldn't move them in California till winter months anyway. Just remember that wherever you prune a cane is where it STARTS to bush out from, so don't expect it to stay at the pruned height. In fact, pruning right at 3' would probably have it forming a "candelabra" effect from that 3' height and have an even bigger clump of canes shooting up to its preferred height.

Cynthia