Dear All: Color coding is useful. Of course one can give one color to South Africans, another for Californians, and so on. In our case, we have used them for 15 years and have solved a lot of problems. Our main one is that we have year round rains (a blessing for normal plants tho) and with thousands of pots it could be easy to leave a dormant plant uncovered and thus lose it to rot. Therefore, we use only two colors, green labels for winter growers (of course, summer dormant) and orange labels for warm growers (and of course winter dormant). Labels are the vynil ones they sell in the States which are the best material and last for several years, six years being an average, not sensitive to UV but sensitive to extreme heat in which case they become soft and deformed. Red labels (of the same material and of the same brand) were too brittle and blue ones too bright to read what was written on them. What we obtain from this double coding is that all plants of the same cycle are exposed to the weather when needed and on the contrary the others are protected. Regards Alberto