Q. I’m seeing all these cute little potted Christmas trees in the garden centers and was considering buying a few. How do I care for them? Can they be planted outside here? Some of the most common ...

What’s in a trend? In the case of topiaries, it seems to be a mixture of their classical look, the lure of indoor gardening in winter, and increasingly refined taste in plants. Plus a pinch of Disney.

Ken Selody, of Atlock Farm, planned to be Texas-bound in April. “If I drove my van full of topiary through Tennessee, Arkansas and Texas,” Selody, who is based in New Jersey, asked on Instagram, “are ...