Grace Hendrick Phillips Boxwood. Don Shadow introduced this very dwarf cultivar to me, and it has been a real hit with our customers. I get somewhat agitated when someone asks me, "How big will it get?" My first response is, "How long will you live." Most plants never really stop growing. Even though this plant only grows about 1 to 2" in height per year and 1 to 2" in width, the oldest specimen is at the National Arboretum, and it is 9' across and 3' high. And we consider this to be one of the most dwarf Boxwoods around. But of course it can be maintained much smaller with some judicious pruning. It does best in the landscape when grown in part shade here in the Deep South, but further north, it will do quite well in full sun. The other prerequisite is good drainage. The different sizes are pictured below, left to right in the last picture: 3 gallon, 3 quart and 2 quart. Since a 3 gallon pot is approximately 10 inches wide, one can see that the 3 gallon plants are slightly wider than this. Likewise, the 3 quart pot is 6 inches wide.