Was just trying to play and I can plant the flowers but as sooon as I go to water them, they instantly disappear. Yet the particles around the flower stay and still glow. I tried just restarting game, but still happens. :(
When you water the plants they become too small but not disappear, we know this bug and we will fixing it soon. Try to water them even if you do not see them, you will see how they grow ^^