Azaleas

There’s a reason azaleas are so hugely popular.

What does #1, #2, etc. mean when used to describe plant container sizes?

In the plant world, the # symbol is used as a number sign and not a pound sign or hashtag. The actual number refers to the approximate size of the container and how much soil it holds. For example, a number-one (#1) container holds approximately one gallon of soil.