A neighborhood library wanted to lend packets of native seeds. At first, volunteers arranged the packets by color because the display looked easy to browse. However, visitors often chose seeds that did not suit the amount of sunlight in their gardens. The library then recorded the light conditions reported by each visitor. This information allowed volunteers to group packets by full sun, partial shade, and shade. The new groups were useful, but another problem appeared: some seeds needed cold storage before planting. For that reason, each packet received a storage symbol in addition to its light group. The final system did not replace one simple label with another. It linked a visitor's garden condition to one label and the seed's preparation requirement to a second, so that a visually attractive packet would not be mistaken for a suitable choice.