Justin121: Presently two. You have to understand that I'm only growing for myself. Each one is a different strain. One is thinner with long buds and the other is bushier with more buds but they're shorter. Each has as many flowers attached as they can produce all the way down to the planting deck. Originally I planted seven seeds and five sprouted. The seeds were between three and five years old so I'm not complaining. Of the five that sprouted one grew into itself and when I tried to straighten it out it broke. The four that survived were two each of the same strain; two tall and two short bushier ones so I separated them into two A/G's by strain. In each pair a male evolved and they went into the compost pile in my vegetable garden. Maybe that's why my tomatoes tasted so good this year. (Just kidding). The two remaining ladies are presently doing well and probably a couple of weeks from flushing and harvest.
If you've been doing this for a while then you know it really doesn't take a lot to grow good weed in an Aerogarden. About all it requires is patience and a lot of curiosity to learn what to do and what not to do. I have friends who got greedy and tried to grow seven plants in an Aerogarden and they ended up with disasters. Read everything you can on the Aerogarden at their website because they're constantly changing. They have some new ideas and accessories that will make your job easier and much more enjoyable. But the underlying fact is that you have to remember at all times that the A/G was not designed to grow marijuana. There, we can work together, exchange information, and learn from each other.
Cervantes's bible on growing medical M/J should be a must for everyone because I don't care how much you know, he'll teach you new things and remind you of what you forgot. Sadly, no one until recently has come up with a guide designed to teach you how to grow medical marijuana with an Aerogarden. I had the opportunity to review a text on the cultivation of medical marijuana using an Aerogarden written by a member of a local co-op named Sebastian. Obviously that's not his real name but he's pretty knowledgeable and I learned a lot from his book. It was scheduled to come out last fall but the publisher got cold feet at the last minute and killed the project. A couple of us are trying to convince him to offer it on line as an E-Book.