Heartleaf Philodendron Plant Care - How to Grow & Maintain Philodendrons | Apartment Therapy
https://www.apartmenttherapy.com/philodendron-plant-heartleaf-care-growing-toxicity-256104Philodendron Care - Learn About Growing Philodendron Plants
https://www.gardeningknowhow.com/houseplants/philodendron/caring-for-philodendrons.htmPhilodendron: Plant Care & Growing Guide
https://www.thespruce.com/grow-philodendron-houseplants-1902768