Give crotons several hours of bright, direct sunlight per day. The more light the plant receives, the more colorful the leaves will be. Grown in inadequate light, the leaves will be mostly green with yellow veins. Leaves may also fall off in low light.
Place plant on a tray of pebbles to give it the little humidity boost it needs. Water will be absorbed by the pebbles and create humidity as it evaporates.
Keep the potting mix moist, but be careful not to allow water to stand on top of soil. Reduce watering in the winter, allowing the top of the soil to dry out between waterings.
Prune branches in early spring if plant outgrows its space or if a bushier plant is desired. Plant will branch where pruning takes place. Croton plants may get tall and spindly without pruning.
Take care to watch for spider webbing on leaves. Red spider mites commonly infest croton plants. They are hard to see with the naked eye, but will leave webs. Remove infested leaves and apply pesticide to plant. Left alone, red spider mites will kill an entire plant, so action must be taken.