Just take care they do not end up cutting into the stem, I saw several large outdoor plants that died just as they went into flower because a hard plastic tie around the stem killed them. That is why I now stick to the soft plastic labels I posted, even that has to be watched and tweaked when you get a bit of girth on.
These stay on even after harvest, so you never loose track of what is what.
These stay on even after harvest, so you never loose track of what is what.