Why Do Leaves Turn Yellow on Outdoor Plants?

When temperatures start to drop and the days get shorter, outdoor plants begin to change color in preparation for winter. Leaves on outdoor plants may turn yellow, signaling the end of their life cycle and the start of a new one.

This is a natural part of plant development and is an important process for healthy growth.

Leaves turning yellow is generally caused by an imbalance in the nutrients within the soil. A lack of nitrogen, magnesium, or potassium can all cause leaves to turn yellow as they are unable to absorb these essential minerals. Additionally, too much fertilizer can cause a build-up of salts in the soil, leading to leaves turning yellow.

Although this process is natural, it is important to take steps to prevent it from happening too soon. Make sure your plants are getting adequate amounts of water throughout the season; this will help them stay hydrated and prevent nutrient imbalances that could lead to leaves turning yellow prematurely. In addition, fertilize your plants regularly with a balanced fertilizer that will provide all the necessary minerals for healthy growth.

It’s also important to check for any pests or diseases that could be causing the yellowing of leaves on your outdoor plants. Insects such as aphids, mites, and whiteflies can all feed on plant sap and leave behind a residue that leads to leaf discoloration. Also look out for signs of fungal diseases such as powdery mildew or leaf spot which can also cause leaves to turn yellow.


Leaves turning yellow on outdoor plants is a natural part of plant development however it should be monitored carefully as it can be caused by nutrient imbalances or pest infestations. To ensure healthy growth it is important to provide adequate water and fertilize regularly with a balanced fertilizer. Taking these steps will help keep your outdoor plants vibrant throughout their life cycle!

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Jennifer Watson