Poinsettia Leaf Shriveling: Causes and Treatment Guide

Poinsettias: Troubleshooting Shriveled Leaves

Poinsettias are beautiful plants that add a festive touch to the holiday season. However, they can be finicky and develop problems, such as shriveled leaves. If your poinsettia is suffering from this issue, don’t worry! In this article, we’ll explore the common causes of poinsettia leaf shriveling and provide step-by-step instructions on how to diagnose and treat the problem.

Causes of Poinsettia Leaf Shriveling

1. Cultural and Environmental Issues:

   • Cold damage: Poinsettias are sensitive to cold temperatures and drafts. Exposing them to cold air can cause their leaves to shrivel and drop.
   • Under watering: Poinsettias need regular watering, but they don’t like to sit in soggy soil. Under watering can cause their leaves to wilt and shrivel.
   • Changes in other site conditions: Sudden changes in light, temperature, or humidity can shock poinsettias and cause their leaves to shrivel.

2. Fungal Diseases:

   • Rhizoctonia: This fungus causes dark discoloration and wilting of the stems, followed by damage to the foliage.
   • Rhizopus: This fungus attacks the foliage, causing water-soaked spots that eventually curl and die. It can also affect the stems and bracts.
   • Scab or spot anthracnose: This fungus starts with lesions on the foliage, which then curl and die.

Diagnosing the Cause

To diagnose the cause of your poinsettia’s shriveled leaves, start by checking the following:

• Examine the leaves: Look for signs of damage, such as discoloration, spots, or wilting.
• Feel the soil: Is the soil dry or soggy?
• Check the temperature: Are the poinsettias exposed to cold drafts or extreme temperatures?
• Inspect the stems: Look for any dark discoloration or wilting.

Treatment

Once you’ve identified the cause of the problem, you can start treatment:

1. Cultural and Environmental Issues:

   • Cold damage: Move the poinsettia to a warmer location away from cold drafts.
   • Under watering: Water the poinsettia thoroughly when the soil feels dry to the touch. Avoid overwatering.
   • Changes in other site conditions: Gradually adjust the poinsettia to changes in light, temperature, or humidity.

2. Fungal Diseases:

   • Rhizoctonia: Remove infected plant debris and repot the poinsettia in uninfected soil.
   • Rhizopus: Remove infected plant debris and repot the poinsettia in uninfected soil. You may also need to use a fungicidal soil drench.
   • Scab or spot anthracnose: Remove infected plant debris and repot the poinsettia in uninfected soil. You may also need to use a fungicidal spray.

Additional Care Tips

To prevent poinsettia leaf shriveling, follow these care tips:

• Provide bright, indirect light: Poinsettias need plenty of light, but they don’t like direct sunlight.
• Maintain warm temperatures: Poinsettias prefer temperatures between 60 and 70 degrees Fahrenheit (15-21 degrees Celsius).
• Water regularly: Water the poinsettia when the soil feels dry to the touch. Avoid overwatering.
• Fertilize monthly: Fertilize the poinsettia every month during the growing season with a balanced liquid fertilizer.
• Remove dead leaves: Regularly remove any dead or diseased leaves to prevent the spread of fungal diseases.

Conclusion

By following these tips, you can help your poinsettia thrive and enjoy its beautiful foliage throughout the holiday season and beyond.