Protect the plant by clicking on a stem to popup a menu that will let you either spawn a sprout or evolve the stem. You can only evolve a stem into a root if it doesn’t have a sprout on it. Roots will make the plant spawn more stems at their location towards the sun. The green bar is the stem’s health and the purple bar is the nutrients for the entire plant. Nutrients are used to spawn sprouts or to evolve the plant. When clicking on the plant or a root, the blue bar is the water for the plant. If the water runs out the plant will start to take damage.