websites
University of Florida IFAS
https://gardeningsolutions.ifas.ufl.edu/ - I use this one to find native plants, what times are best to plant and find other general info.
https://gardeningsolutions.ifas.ufl.edu/plants/ornamentals/wildflowers-for-all-seasons.html - I use this to get ideas for what I can keep blooming year-round for pollinators.
Hawthorn Hill
https://hawthornhillwildflowers.blogspot.com/ - super cool site featuring a bunch of rare and interesting Florida plants.
University of Wisconsin
https://hort.extension.wisc.edu/ - good horticultural information
apps
Seek
https://www.inaturalist.org/pages/seek_app - One of my favorite apps on my phone. Take a picture of anything in nature and it will try (usually successfully) to ID it for you. I started off with this, and now I exclusively use iNaturalist.
iNaturalist
https://www.inaturalist.org/ - The company that made Seek - you can post photos on here and people will vote to ID things. I’ve gotten some good answers on here. BONUS: your profile has a map view, you can see all the places you’ve observed things.