Experts and BHG readers answer.
Relocating American boxwoods
Yes, you can transplant them this month. The sooner you do it, the better, because they'll fare better during the cooler spring weather. And it won't be long before your weather goes from cooler spring to hot summer. Move the plants with as big a root ball as you can manage. Then tend to them throughout the summer, watering when it gets hot and dry. Soak them deeply when you water. You can set the garden hose on a trickle at the base, or I like to drill a small "weeper" hole in a 5-gallon bucket, fill the bucket, and then let the water trickle slowly on each plant. You might even sprinkle down the foliage some mornings if the boxwoods start to look particularly stressed during the summer heat.