Why Outdoor Plant Leaves Turn Yellow

Some reasons behind why plants may struggle with chlorophyll production and making the leaves more yellow than green. When your plant leaves turn yellow, an ailment known as chlorosis there’s usually a reason. Read on to understand more about what could be causing your outdoor plant’s leaves to turn yellow.

• Soil pH

Leaves turn yellow can also be caused by soil that is too alkaline for the plant. In general, the majority of plants do best with a neutral to slightly acidic soil pH, near 6.0 or 7.0. Some plants, including rhododendrons and blueberries, love a more acidic soil in the 4.5 to 6.0 pH range.

• Sunlight

Sunlight is most important for photosynthesis, so if a plant is not getting enough sunlight, its leaves will look faded. Too much direct sunlight can scorch leaves, causing them to turn yellow or brown with crispy edges.

• Water

Under-watering and over-watering both can be cause of leaf yellowing. Underwatered plants lack the moisture they crave, leading to wilting and yellowing leaves particularly the lower leaves. On the other hand, too much water will suffocate the plant’s roots, hindering their ability to absorb water and nutrients.

• Lack Nutrient

Essential minerals are absorbed through the soil, and different plants have different nutrient requirements. Know what each of your plants need, and test your soil regularly to make sure it contains the right amount.

• Pest

There’s a number of additional pests infesting our gardens. Aphids, mites, earwigs, mealybugs, thrips, scale, or whiteflies–amongst many others–are all typically found around our fruits, flowers and vegetables. The damage and symptoms shown by your plants may vary depending on the type of pest, this is another sign of yellowing leaves.

• Fungi or Bacteria

Plant leaves turn yellow if it has been infected with a fungal or bacteria. If you are growing tomatoes, you might want to monitor your plants closely for two fungal diseases that both start with yellow leaves and eventually kill the plant.

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