Flowers and Trees are the grown from seeds you receive in Meteors.
In the early stage of the game, there are five flower types, each associated with the five weather conditions: Sun, Moon, Rain, Cloud and Wind. Flowers grow weather gems when their respective weather conditions are happening.
Trees represent other players from around the world. Trees serve as portals connecting you to other player’s weather. If you want to grow rain gems, and you don’t have any local rain, see if you have a tree with rain and override your weather!