I keep patrolling, gather reagents and food but no sign of Willow. I got some of her bark and researched it completely. But she doesnt seem to be showing up. Any advice? I used an older save and I'm using 175
Viewing post in Finding Color in the Ashes comments
You need to have the greenhouse built and heart tree fully researched. Once you have both, an encounter with the dryad will get her to give you a heart tree seed. Once you have that, plant it in the greenhouse and give it some time to grow.
If you think your save might be bugged, drop me a line on discord and I can check out the save file and figure out what broke :)