From the sounds of it, it's not just the database that will close down, it's the entire Tinkers site, forums and all.
daylilydreams, I do hope you reconsider and perhaps add a few at a time, maybe a winter project. Even if you post images here in a thread, perhaps a fun winter time parade of favorite shots or blooms, it's easy for anyone then to add them to the database directly from the thread by clicking the "[Propose image for the plant database]" located at the bottom of each image.