As long as the soils around Trevi Fountain Lungwort aren’t allowed to completely dry out, this plant is relatively disease free. Pulmonarias can develop Powdery Mildew when drought stressed, however, Trevi Fountain Lungwort is more resistant to the fungus than other cultivars.
The foliage can scorch during periods of excessive heat. Even though Trevi Fountain is more tolerant of heat and sun, keep an eye on it when we have exceptionally high temperatures. Clip out damaged foliage when noticed with a clean pruner.
Slugs and snails can be problematic and damage the foliage, but you’ll notice issues with your hostas before you see anything on your lungwort. If it is an issue, you can use a slug and snail repellent/pesticide to protect the foliage.