Yes, now is a good time to plant in your location. You do not need to break the root ball, just carefully extract them and plant them. Then water them, mulch them up to the drip line and you are set to go. Winter protection will help in case winter is unusually cold. I usually prepare for such spells by keeping my supplies handy but do not winter protect until the weather service says something. That got me in trouble this year though (NWS issued cold alerts and I slept thru them) and I ended with little bloom production from my mopheads. :o(

They probably have those round fert pellets so do not fertilizer until next year. If you soi is alkaline, plan to amend the soil in Spring with garden sulfur, aluminum sulfate, greensand or iron-chelated liquid compounds. You can fertilize them with 1/2 to 1 cup of organic compost, composted manure, cottonseed meal or use a slow-release, general purpose chemical fertilizer per label directions.

The location should provide the shrubs with afternoon/evening shade in the summer months.

In their first few summers, count on seeing some wilting episodes since the shrubs like to pout in Years 1-3. If the soil is dry when they wilt, water them immediately. But if the soil is moist, they will recover on their own at night.

When you water, water only the soil early in the mornings and aim to get moisture down to around 8-ish inches. I decide to turn on the drip irrigation when a finger inserted to a depth of 4" feels dry or almost dry.

Thanks, Luis. Sounds pretty straightforward. I will look out for extra harsh winter weather and protect if necessary.