To propagate your Philodendron Broken Heart plant, start by selecting a healthy stem with a few leaves. Cut just below a node using sterilized scissors. Place the cutting in water, ensuring the node is submerged. Change the water weekly to prevent bacteria growth. After a few weeks, roots will form. Once the roots are a few inches long, transfer the cutting to a pot with well-draining soil. Keep the soil moist but not waterlogged. Position the pot in a spot with indirect sunlight. Your new philodendron broken heart plant will thrive with proper care and patience.