Access or MySQL are the only ones I would want and I'm looking for a db that I can integrate into a larger set of gardening tools. If you are using another db, can I have a schema?
Visualplant doesn't appear to be available anymore. I've visited their website and they don't mention anything about the software and its availability which means that you'll have to get in touch with them to obtain the necessary information.
Luckily, they have a working page and contact details already available.