A lot more than you might think! This will depend a lot on the size of the system you buy, but some can hold more than 100 plants. Keep in mind that these systems are a good long-term investment. It’s not always about the amount of plants growing at once because you can only use so much. Instead, get the size of the unit that works for you or your family, and keep it replenished. You should be able to keep a steady rotation to always have fresh options, and leafy greens are an important source of nutrients.