You can grow anything but root vegetables.
Here is a list of plants we have grown in windowfarms using supplemental lighting from CFL bulbs:
Okra, cherry tomatoes, scallop squash, small cucumbers, beans, strawberries, peppers, peas, japanese eggplant.
Arugula, bok choy, brocolli rabe, kale, chard, radicchio, watercress, chives, various microgreens, and many varieties of lettuce.
Rosemary, cilantro, basil, thyme, oregano, parsley, mint, and sage.
Nasturtium, violets, and marigolds.
We have had varying degrees of success with each depending on the particular microclimate of the window, the amount of natural sunlight available, the drip rate, the type of nutrients, our ability to fight pests, the source of the seeds, and the particular variety of each species.
You can actually grow some pretty big, productive plants even though the containers are small because plants growing in hydroponic systems grow differently from dirt plants. Instead of growing large long roots that have to grow far from the plant to find new water and nutrients in the soil, plants grow more compact rootballs that grow a lot of root hairs for more surface area to absorb more of the water and nutrients you are sending directly to the roots.
Check out how big and healthy some of the plants in this early system were.
Many more varieties of plants are certainly possible but we need your help testing what works because we can only grow so much ourselves. We need you to try out different plants and techniques and share your knowledge about what works. The goal is to get the most nutrients and the most variety for the carbon footprint of the systems.
As we refine the website, we will create ways that you can track and share your results. In the meantime, please focus on getting your system ready and working well and in the meantime, just please be sure to make posts and tag them well. We strongly encourage new users to start with the simple 3-plant airlift system (there are some chronic problems with the reservoir system so we are moving away from it).