So for example: for a Potion of Greater Healing (considered an Uncommon, consumable magic item of a potion), the ingredients would be 2x Water Wart, and 2x Extract of Goodberry (which I would remind them is cut in half because of their Alchemist specialization). Water Wart, as the name implies, grows in and around rivers, and is generally pretty common, easy to buy and harvest (DC 10 to harvest during downtime).
Extract of Goodberry, on the other hand, would be a bit harder to find, since Goodberries only 'naturally' grow in forests that are infused with fey magic. These aren't super rare,…