Last year, I used so called permanent marker pen on labels - but this didn't last. I think there was a thread over in Kitchen Garden mag on labels and one suggested to use a Dymo label thingy. I managed to get one of these after Christmas - the Junior label thingy is less than a £10, and tapes are often sold over on eBay. I am trying them this year, and so far, all seems ok. IT is, however, tedious and hand-aching to do the labels.