A strange issue happened recently in the game.
I can't plant flowers anymore on Dyson trees, which is a bit annoying. I can still plant on defense trees though.
It happens in regular game only (basic and dark matter), not custom maps.
When I should be able to plant the toolbar makes room for the "plant" icon but the icon itself doesn't appear.
Steam says my files are not corrupted. I tried uninstalling, reloading the game and installing again, the problem is still there.
I haven't erased config files though because I don't want to lose my saves.