Yes, as long as the plans you are gonna grow have similar height and growth cycle. If you are a beginner, we highly recommend you to start with herbs like basil, mint, rosemary, as they have similar height and growth cycle. Lettuce is also recommended but need to take care of the leaves in case the large leaves cover other small plants which will not be good for other plants' growth (they may not get enough light). It's better to grow plants with smiliar height and growth cycle, or you will have a problem like how to place the light panel which will be good to all of them when they are in different heights.