Sometimes you'll see trees or other larger plants wrapped with a cylindrical hard yet flexible plastic wrap that expands (cut along the length of the tube - not stretching) as the plant grows and helps protect it and or support it. What is the name of this?
For smaller plants I can just use heat-shrink tubing and make a cut myself.
They're called tree shelters or tree guards, but there are other types of shelter for other plants. The only ones I know about are made by a company called Tubex in the UK, not sure if they supply outside Europe. There are also spiral tree guards, which are meant to go around the trunk or stem - Ebay in the UK currently has them available, maybe they're online wherever you are too. Some expand, some have to be repositioned as the plant grows, but if you look up tree guard or tree shelter, you should get some information as to what's available.
I use vinyl tree guards for this, when planting out trees. They look like this:
They are reusable, and if you find a good supplier, they're extremely cheap.
