Reasons for Black Leaves on Philodendron 'Golden Diamond' and How to Fix Them

There are many reasons for black leaves on Philodendron 'Golden Diamond': if it is caused by improper watering, water only when the potting soil is dry, and do not water when it is moist. If it is caused by a lack of fertilizer, apply fertilizer once a week during the growing season and once a month during the dormant season. If it is caused by unsuitable soil, adjust it to acidic soil promptly. If it is caused by improper light, provide shade when the sunlight is strong.