Heartthrobs hide away in the shade to protect their privacy, and so do Philodendron Neon (Philodendron cordatum 'Neon'). The heart-shaped leaves of this vining epiphyte are a popular indoor plant. They convey many of the features of the pothos plant. They like northern or eastern exposure in medium-lit areas. Water when the top portion is dry to keep the leaves looking lush.