Once you receive the heart tree seed, plant it in the greenhouse (if you need to clear a spot, press the little x in the top right corner of a plot) and itll grow over a week or two. The Dryad will appear and you will gain access to 3 more plots to grow in. The newest update on patreon is big content update for the Dryad (3 new scenes, some events, lots of new dialog) and will be on itchio in a couple weeks!