7 Common Reasons for Philodendron Leaves Turning Yellow

Why Are My Philodendron Leaves Turning Yellow

If you’ve noticed your philodendron's leaves turning yellow, it’s a sign that something isn’t quite right. Things like poor environment, not enough care, or pests can cause yellow leaves. It's important to figure out what's going on and know how to fix it is essential for restoring your plant’s health and vibrancy. In this blog, we’ll explore the most common reasons behind philodendron leaves turning yellow and offer practical solutions. Let’s get started! 

Natural Aging Process

Yellowing leaves on a Philodendron are sometimes just a natural part of its life cycle. As the plant matures, older leaves may slowly turn yellow and die off while the plant focuses its energy on new, healthy growth.

How to Fix  It

If only the older leaves turn yellow and the new growth looks vibrant, there’s no need to worry. This is simply a sign that your plant is prioritizing new growth. To keep your Philodendron looking tidy, trim off the yellowing leaves using clean, sharp scissors or pruning shears. Be careful not to damage healthy stems or leaves.

Watering Issue

Watering a philodendron

Overwatering is one of the most common causes of philodendron yellow leaves. When a philodendron is watered too often or the pot lacks proper drainage, the soil can become waterlogged, leading to root rot. Without healthy roots to absorb the nutrients and oxygen that plants need, the leaves, especially those at the base, begin to yellow. 

On the flip side, insufficient water can also stress the plant. Underwatering can manifest in various ways, with one of the most noticeable symptoms being yellowing leaves. The leaves may also become dry, crispy, or even start to curl at the edges, which are signs of dehydration. 

How to Fix It

The ideal watering practice for philodendrons is to keep the soil slightly moist, but not soggy. This can be tricky for beginners who may not yet be familiar with their plant’s needs. To make it easier, we recommend a simple method: gently insert your finger 1-2 inches into the soil. If it feels dry at that depth, it’s time to water.

It's also important to ensure your pot has proper drainage. Pots with drainage holes allow excess water to escape, preventing the soil from becoming waterlogged. If your pot lacks drainage holes, consider transferring your plant to one that does. Don’t forget to empty any excess water that collects in the saucer beneath the pot.

Incorrect Light

Philodendrons prefer bright, indirect light, similar to their natural habitat. In the wild, they grow beneath taller trees, receiving sunlight filtered through the canopy. In low-light conditions, they struggle to photosynthesize effectively, leading to yellowing leaves. Conversely, direct sunlight can be too intense to scorch the leaves, causing unsightly yellow or brown spots.

How to Fix It

philodendron in direct light

To restore your Philodendron’s health, move it to a location with bright, indirect light. Ideal locations include near windows with sheer curtains or rooms where light is filtered through trees or architectural features. These areas provide the right amount of light for growth while avoiding the risk of burning your plant.

Artificial lighting can be a great alternative to sunlight. LED grow lights are specifically designed to deliver the optimal light spectrum for healthy growth. High-quality LED grow lights also incorporate heat sink technology, preventing heat stress and providing a safe, efficient light source for your plant.

Nutrient Deficiency

Nutrients are essential for the health of your philodendron plant. When certain nutrients are lacking, the plant may exhibit visible signs of stress, including yellowing leaves.

  • Nitrogen deficiency: Nitrogen is fundamental for leaf growth and overall plant vigor. When nitrogen is deficient, older leaves typically turn yellow and may eventually drop off as the plant prioritizes new growth. 
  • Iron deficiency: Iron plays a crucial role in chlorophyll production, especially in new leaves. If your philodendron lacks iron, you’ll notice yellowing between the veins of newer leaves, while the veins remain green. This condition is known as interveinal chlorosis.
  • Magnesium deficiency: Magnesium is a vital component of chlorophyll and aids in photosynthesis. A magnesium deficiency usually causes yellowing between the veins of older leaves, while the veins stay green.
  • Calcium and Zinc Deficiencies: Calcium is important for strong cell walls and growth, while zinc supports various enzymatic functions. Deficiencies in either nutrient can lead to yellowing leaves, stunted growth, and poor plant health.

How to Fix It

To address nutrient deficiencies, begin by using a soil tester to accurately identify any issues before applying fertilizers. For targeted deficiencies, select a fertilizer formulated to address the specific nutrient your plant requires. For overall plant health, use a balanced, water-soluble fertilizer regularly.

Temperature Stress

Indoor philodendron

Philodendrons, like many tropical plants, are accustomed to the consistently warm, humid environments of their native habitats. When exposed to extreme temperatures or sudden temperature changes, Philodendrons can become stressed, which can manifest in a range of symptoms such as yellowing leaves, wilting, or even the loss of leaves.

How to Fix It

Place your philodendron in a room with stable temperatures ranging from 65°F to 80°F (18°C to 27°C), which closely mimics its natural tropical conditions. Avoid positioning it near radiators, heating vents, air conditioning units, or drafty windows to minimize exposure to sudden temperature changes.

Pests Infection

Pests and Insects are common culprits when it comes to yellowing leaves on Philodendrons. Insects like aphids, spider mites, and mealybugs are particularly troublesome. These pests pierce the leaves and stems, sucking out the plant's vital fluids, which can lead to yellow spots, curling leaves, and wilting.

How to Fix It

To manage pests, regularly inspect your Philodendron, focusing on the tops and undersides of the leaves. Look for yellow spots, webbing, and visible pests. If you find any, gently wipe them off with a damp cloth. For further infestations, treat the plant with insecticidal soap or neem oil. Dilute the product according to the label instructions and spray all areas of the plant.

Root Bound

When a Philodendron becomes root-bound, the roots become tightly packed, often circling the edges. This restricts the plant's ability to absorb water and nutrients, leading to stress. As a result, the plant may exhibit signs such as yellowing leaves, slow growth, and wilting, even with regular watering.

How to Fix It

Repot a philodendron

To fix a root-bound Philodendron, repot it into a container that’s 1-2 inches wider in diameter than the current one. Gently remove the plant from the old pot, and if the roots are tightly wound, loosen them carefully with your fingers or a knife. Fill the new pot with fresh, well-draining soil, then water thoroughly. Repotting every 1-2 years will ensure your Philodendron has enough space to grow and thrive.

Final Thoughts

Yellowing leaves on your philodendron is a signal that something is wrong, but with proper care, most issues can be easily resolved. Whether it’s adjusting your watering routine, providing more light, or addressing pests, taking the time to understand your plant’s needs will help you enjoy healthy, vibrant philodendron foliage year-round.