Is the L&G Spritzer Planter suitable outdoors?

Yes. The plastic body handles rain and frost better than unglazed ceramic or terracotta. In exposed, windy spots, weight the base or group it with other pots.

Does it have drainage holes?

The listing does not state drainage. Check the base before planting, and drill holes if it is solid, since most plants rot in standing water.

What size plant fits a 16-inch planter?

A 16-inch diameter and 13-inch height suit medium shrubs, small trees and full annual displays. A plant sold in a 10 to 14-inch nursery pot will drop straight in.

How does it compare with a ceramic planter?

It is much lighter and cheaper to make, and it survives knocks that chip ceramic. Ceramic and concrete look more convincing up close and hold tall plants steadier.

Can I leave it out through winter?

Plastic tolerates freezing better than porous clay, but a full pot can crack if water freezes inside. Empty it or raise it off the ground in hard-freeze areas.