Periodically the plants will disappear in the pots. If you hover over them, you can see and interact with the highlighted outline, but you can not see the plants.
Ideas
is this what you are seeing: Leaves become transparent (Laptop mode) | EA Forums - 11853719 ?
If not, please add a picture.
Also add info if you are using mods/cc and what platform you are on if above is not what you are seeing.