Re: Plant food does not refresh seed packet
I am assuming you're referring to the plants shown in the vertical lineup of 6 slots to the left of your screen? (The one containing your selected plants, with the mandatory plant at the top - Parsnip this week.)
When you attempt to use the plant food to instantly refresh any plant within that lineup, including mints, do you just tap the plant food and then tap the required plant? If that is what you are doing it will not work.
It's not like when you tap the plant food and then tap a plant that's already been placed on the playing field. You have to touch and hold the plant food and then drag it to the required plant/mint and then release it once you are sure you have the green leaf symbol on the correct plant. (It is rather easy to miss during the heat of battle and refresh the incorrect plant.)