As of March 10, 2015 Barberry is on the list of invasive species in NY State. That means this season is the last chance to add some beautiful barberry to your landscape.
Barberry is great because it's deer and rabbit resistant on account of its thorny exterior! Barberry does not play well with others and has a tendency to overpower other plants because of the chemical it emits. That being said, it's best to not try to place other plants near it.
More about Barberry

Barberries like full sun or partial shade and are very adaptable to a wide range of soil types as long as it drains well. Transplant barberries just after flowering or in late winter.
Barberry Shrub Care
When it comes to barberry shrub care, you’ll find that it’s pretty minimal. In fact, pruning barberry plants may be the most work performed with this shrub.
If you are keeping your barberry shrubs as a hedge, it is necessary to prune a couple of times a year. Pruning barberry plants increase shrub health and vigor. Prune for shape during the winter or fall after the plant has fruited. Remove dead wood during the summer and winter months.
A 3-inch layer of mulch helps with moisture retention.
Fertilizing barberry shrubs is generally not necessary.