If your rose leaves have turned yellow, don't worry too much as we've consulted the best garden experts we could find to find out why rose leaves turn yellow and if there is a solution.

Rose slugs may be the culprit. Rose slugs are the caterpillar-like larvae of a sawfly, a type of primitive stingless wasp. Adult sawflies are thick-waisted, about 1/2-inch long and mostly shiny black.

Older larvae chew holes through leaves. This makes for many, many lacy rose leaves throughout the garden. Sawflies develop through four life stages: egg, larva, pupa and adult.