This is an awesome list with many things I’d never thought of! Thanks for taking the time to write it out. Seems like requirements for the gardening user and the houseplant user vary pretty substantially!
Ah yes, there is already a category for aquatic, but you're right that they should really have their own set of filters and everything else too. (foreground / background plant, needs CO2, water PH, etc.). Im wondering if there is a way to provide a tailored user experience based on what the user is interested in, but I feel that will explode in complexity.