Answer: Caragana is also known as the Siberian Pea Shrub, a hardy plant for poor sites. It will grow in any soil, in full sun or part shade, and will tolerate droughty conditions. Caragana will grow quickly to 15-20 feet high with a 12-18 foot spread. They are susceptible to a fungal leaf blight, which may be a result of your rainy spring. You can cut the stems back without hurting the plant, and dispose of the infected stems and leaves. This will keep the disease from spreading to other healthy plant parts. There are no chemical controls for the leaf blight. Prune your shrubs to remove the diseased parts and open them up to better air circulation.
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