Pelargonium, often called the florist’s geranium, is a perennial plant from the Geraniaceae family known for its beautiful flowers and evergreen foliage. Native to South Africa, it’s a popular plant on balconies and in gardens. While it’s easy to care for, the leaves of this plant can sometimes turn red due to common mistakes in its care. Let’s explore the main causes of this issue and how you can prevent it.
Why Do Geranium Leaves Turn Red?
There are three primary reasons why the leaves of your pelargonium might turn red. Identifying these issues early can help you restore your plant’s health and beauty.
1. Red Leaves from Overwatering
Pelargoniums thrive in well-drained, low-moisture soil and require only a small amount of water. Overwatering is a common issue, especially for container-grown pelargoniums. When the plant’s roots sit in standing water, they can drown, causing the leaves to discolor. If left untreated, this can lead to leaf drop and even plant death. To avoid this, always make sure there is no excess water in the saucer, and let the soil dry out between waterings.
2. Red Leaves Due to Cool Temperatures
Pelargoniums prefer warm conditions, and cool or fluctuating temperatures can cause shock, leading to red or discolored leaves. This is particularly common in spring, when temperatures start to rise, and fall, when the weather cools. If your geraniums are in pots, be sure to bring them indoors when the temperatures start to drop to protect them from the cold.
3. Red Leaves Due to Stress
Stress can be a major cause of red leaves in pelargoniums. Stress can occur due to overwatering, exposure to direct sunlight, or poor soil conditions. While geraniums love sunlight, excessive exposure, particularly for older leaves, can cause discoloration. Try moving your plant to a spot with partial shade to reduce sun stress. Additionally, pelargoniums can experience stress if planted too early in the season, especially when the climate is still unfavorable. Mineral deficiencies, particularly in phosphorus and trace elements, can also cause stress. Fertilizing with a liquid fertilizer rich in phosphorus every two weeks can help.
How to Care for Florist’s Geranium and Preserve the Green Color of Its Leaves
To maintain the health and vibrant color of your pelargonium, proper care is essential. Here’s how you can avoid discoloration and stress:
1. Proper Watering
Before watering your pelargonium, check the soil moisture by sticking your finger into the soil. Only water when the soil is dry, and make sure to empty any excess water from the saucer or pot to prevent overwatering.
2. Repotting and Drainage
To keep your pelargonium thriving, repot it every two years. When repotting, ensure good drainage by placing a layer of clay balls at the bottom of the pot.
3. Regular Pruning
To encourage vigorous growth and prevent leaf discoloration, prune your geranium regularly. Use sharp, disinfected pruning shears to remove dead leaves and faded flowers. If some leaves have lost their green color, prune them to promote healthy new growth.
4. Protect Against Pests
Young pelargoniums are vulnerable to pests such as green aphids, thrips, and whiteflies. Protect your plants from these threats to ensure they stay healthy and vibrant.
By following these simple care tips and avoiding overwatering and stress factors, your pelargonium will stay vibrant, green, and healthy all year round, even if you don’t have a green thumb!
