At the risk of making the "on-topic" list too long to be easily digestible, I'd split that bullet point into two: one for identification and one for diagnosis/treatment of problems.
As you've noted, we welcome lots of plant identification questions, though some types I don't see as being completely appropriate — seaweed or lichen, for example — since they wouldn't be part of a typical garden, or would be something that you'd want to remove rather than cultivate — mosses in a lawn being an obvious candidate here.
I don't see animal identification as belonging here, except in the context of the animal affecting the garden in some way, in which case it would also fall under pest control:
My suggested wording for the "identification" bullet:
- identification of plants — trees, shrubs, flowers, wildflowers — cultivated or growing in the garden or as a houseplant, or of animals that are affecting your garden or houseplants.
With identification handled separately, the other bullet point would address the "problem" aspects of the original wording:
- gardening problems such as diagnosis and management of plant diseases and pests or methods for controlling weeds.