geranium leaves turning yellow

Why Your Geranium Leaves Are Turning Yellow

Geraniums are popular flowering plants that are often used as houseplants or in garden beds. Unfortunately, their leaves may sometimes turn yellow, which can be concerning for gardeners. There are a number of potential causes for geranium leaves turning yellow, ranging from environmental stressors to nutrient deficiencies. In this article, we will discuss some of the most common causes and how to prevent and treat yellowing leaves.

There are a number of different varieties of geranium that are grown as indoor and outdoor plants, including:

  1. Common Geranium (Pelargonium x hortorum)
  2. Ivy-Leaved Geranium (Pelargonium peltatum)
  3. Scented-Leaf Geranium (Pelargonium graveolens)
  4. Martha Washington Geranium (Pelargonium domesticum)
  5. Zonal Geranium (Pelargonium x zonale)
  6. Regal Geranium (Pelargonium x domesticum)
  7. Mosquito Geranium (Pelargonium citrosum)
  8. Wild Geranium (Geranium maculatum)
  9. Stork’s Bill Geranium (Geranium molle)
  10. Oak-Leaf Geranium (Geranium palmatum)

Proper Care For Geraniums

Yellowing of geranium leaves is often caused by a nutrient deficiency, such as a lack of nitrogen or potassium. It can also be caused by overwatering, which can cause root rot, or from too much direct sunlight, which can cause leaf scorch. Too much fertilizer can also cause the leaves to yellow. Proper watering, fertilizing, and sunlight are all important for keeping geraniums healthy and preventing yellow leaves.


Proper care of geraniums can help prevent yellowing leaves and ensure that your plants stay healthy. First, make sure to water geraniums regularly, but don’t over-water them, as this can lead to root rot. Geraniums also prefer bright, indirect sunlight. Additionally, fertilize your geraniums every two weeks with a balanced fertilizer that’s 10-10-10 or 20-20-20. Lastly, be sure to remove any yellowing leaves as soon as you notice them. This will help to prevent the spread of disease.


Geranium Leaves Turning Yellow From Diseases And Pests

Unfortunately, certain diseases and pests can cause geranium leaves to yellow. Common diseases affecting geraniums include Botrytis blight, aster yellows, and powdery mildew. These diseases can cause yellowing or browning of leaves, as well as stunted growth. Pests such as aphids, mites, and whiteflies can also cause geranium leaves to yellow. To prevent these problems, it is important to regularly check your geraniums for signs of pests and diseases, and take appropriate measures to control them.


When dealing with diseases and pests that cause geranium leaves to yellow, it is important to first identify the cause of the problem. If the cause is a disease, such as powdery mildew or leaf spot, it is important to treat it with a fungicide. If the cause is a pest, such as aphids or spider mites, it is important to treat it with an insecticide. Additionally, it is important to keep the plant in an area with adequate air circulation. As well as to water the plant from the bottom rather than from the top. Finally, it is important to routinely inspect the plant for any signs of pests or diseases.

Cody Medina
Small Scale Farmer
Hi there! I'm Cody, a staff writer here at The Garden Magazine and a small-scale farmer living in Oregon. I've been gardening most of my life and now live on a quarter-acre farmstead with chickens, ducks, and a big garden.