This USB Greenhouse by Brando is USB-powered and illuminated by a grow light (similar to indoor greenhouses). In addition, it comes with software that monitors the plant status and charts your plant's growth progress (with your help).
The USB Greenhouse by Brando ($43) claims to monitor growth status and send watering reminders via software, but we're not sure how that is determined. The starter pack includes seeds of Marigold, artificial soil, and the USB greenhouse. Visit Brando for more information.