Overcoming Common Calendula Problems

If you're a gardener, then you know how rewarding it is to watch your plants grow and thrive. But sometimes, despite our best efforts, problems arise with our beloved plants. In this article, we'll discuss some of the most common problems that gardeners face when growing calendula, along with tips for overcoming them.

1. Powdery Mildew

One of the most common problems with calendula is powdery mildew, which appears as a white, powdery coating on the leaves. This fungal disease is often caused by high humidity and poor air circulation. To prevent powdery mildew, be sure to plant your calendula in a location with good air flow, and avoid overhead watering. If you do notice powdery mildew on your plants, spray them with a mixture of one part milk to nine parts water. The proteins in the milk will help to combat the fungal infection.

A calendula plant affected by powdery mildew

2. Aphids

Aphids are small insects that can quickly infest a calendula plant, sucking the sap from its leaves and causing stunted growth. To get rid of aphids, blast them off the plant with a strong stream of water, or use insecticidal soap. You can also introduce ladybugs or lacewings to your garden, as they both feed on aphids.

A calendula plant affected by aphids

3. Root Rot

Root rot is a fungal disease that affects the roots of plants, causing them to become mushy and discolored. It's often caused by overwatering or poor drainage. To prevent root rot, make sure your calendula is planted in well-draining soil, and don't water it too frequently. If you do notice signs of root rot, remove the affected plant and dispose of it properly to prevent the spread of the fungus.

A calendula plant affected by root rot

4. Fungal Leaf Spot

Fungal leaf spot causes circular brown spots to appear on the leaves of the plant. It's often caused by high humidity and poor air circulation. To prevent fungal leaf spot, be sure to plant your calendula in a location with good air flow, and avoid overhead watering. If you do notice leaf spot on your plants, remove the affected leaves and dispose of them properly to prevent the spread of the fungus.

A calendula plant affected by fungal leaf spot

5. Poor Flowering

If your calendula isn't producing many flowers, it may be due to a lack of sunlight. These plants need at least six hours of direct sunlight each day to thrive. They also require regular deadheading to encourage new blooms. If you've addressed these issues and your calendula still isn't flowering, it may be time to fertilize it with a balanced fertilizer.

A calendula plant not producing many flowers

Other potential problems with calendula include spider mites, caterpillars, and thrips. Keeping a close eye on your plants and taking action at the first sign of trouble can help you to keep them healthy and thriving.