It's simple: just download the app (search for " Prêt à Pousser " in the app or play store) and indicate the plants you have in your Nano. The app will tell you what lighting mode your plants need. Most plants need the summer mode (2pm), but there are some very sensitive plants that need a little less, like coriander, parsley and dill. For these plants we have developed the 'Spring' mode, with 12 hours of light per day.