Plant labels

I have hundreds of large, white plastic labels that I've used my black marker pen on. That's difficult to clean off, so I have ended up with loads of markers with types of flowers and veg that I might never grow again. So, I needed a new method.

I've decided to go for a 1,2,3 kind of system where I put a number on a label, and then note down what that stands for, and keep that for reference.