Solving Beebalm Problems

See details below this chart.

Solving Beebalm Problems
SymptomsProbable Cause
Leaves Covered With White PowderPowdery Mildew
No Bloom; Woody Growth In Clump CentersOvercrowded or Too Dry
Leaves Curled and DistortedAphids
Ragged Holes in LeavesSlugs and Snails
Leaves Spotted or BlotchedFungal Leaf Spot
Powdery Spots on Leaves; YellowingRust

No Bloom; Woody Growth In Clump Centers Signals Overcrowding or Too Dry
Older beebalm plants will eventually develop large clumps of roots. They will begin to flower poorly, grow irregularly and develop a woodiness in their centers. To restore vigor to the plants, divide them every 2 or 3 years in the spring. Cut away and discard older roots. Replant newer ones. Another possibility is that the plants suffered dry soil for too long which sometimes inhibits the formation of flower buds.

Powdery Spots On Leaves; Yellowing Due To Rust
Rust diseases caused by various fungi produce pale yellow areas on upper leaf surfaces and powdery spots of fruiting bodies on undersides directly beneath. Infected stems and flowers may be seriously deformed. Remove any infected leaves from beebalm plants as soon as possible. Control weeds in and around the garden. Spray pest insects such as aphids and whiteflies with neem oil soap to prevent their carrying the disease. Rust can be prevented by periodic sprays of neem oil on healthy foliage of vulnerable plants, starting several weeks before the disease normally appears. Follow product label instructions. Space plants widely apart for good ventilation, and avoid wetting the foliage when watering. For more information see the file on Controlling Fungal Disease