They are only able to be sold at the market (or to others) until there is a future use for them.
If you are interested in keeping them (items like the Red Maple Sap, Rhubarb, Lentils etc.... you can do the following
- Go to the market as if you were going to sell inventory.
- Click the prompt "Show me your prices"
- When your inventories open, go through them all and CHECK the box of all the items you do NOT want and have NO NEED for.
- then ... you sell only... ONLY the products which you selected - SELL SELECTED.
- Do NOT go to the Non-ingredients pull down to sell stuff.... you will lose the new products, and many others (for example, the Grouper which was useless before, but will be used in a fish facility shortly).
- Periodically, after you sell at the market using the SELL SELECTED, you can also "SELL HALF" of things you have too much of.
