Mums are tough plants, but like any flower, they can face a few challenges. The good news is that with some simple care and vigilance, most problems can be prevented or managed.

Common Pests

Aphids – Tiny green, black, or white insects that cluster on stems and buds, sucking sap and weakening plants.

Solution: A firm spray of water or insecticidal soap works well.

Spider Mites – Microscopic pests that cause speckled, yellowing leaves and fine webbing.

Solution: Increase humidity around plants and use a miticide or insecticidal soap if needed.

Thrips – Small insects that can cause streaks or distortion on petals.

Solution: Remove affected flowers and treat with insecticidal sprays.

Common Diseases

Powdery Mildew – A white, powdery coating on leaves, often from damp, shady conditions.

Solution: Provide good airflow, water at the soil level, and remove infected leaves.

Leaf Spot – Brown or black spots on leaves caused by fungi.

Solution: Avoid overhead watering, prune away affected leaves, and use a fungicide if necessary.

Root Rot – Caused by overly wet soil. Roots become mushy and plants wilt.

Solution: Always use well-draining soil and avoid letting containers sit in standing water.

Local Note for NB Gardeners

Our cool, damp fall weather can encourage mildew and leaf spot, so be mindful of spacing plants for airflow and watering at the base instead of on the foliage.

💡 Pro Tip: A little prevention goes a long way—healthy, well-watered mums are less likely to suffer from pests and disease.