I'm very happy to announce that this update to Potioneer includes the functionality of saving your very own personal garden.
Saving is automatic and is done when you exit the game by pressing the Escape key.
The sorts of things that are saved when you save a garden are:
Your save file can be found in C:\Users\<your-username>\AppData\LocalLow\Focus on Fun Games\Potioneer (in case you ever need to clear your garden and start fresh).
Be sure you let me know what you think!