Experts and BHG readers answer.
White speks on the leaves of my plant that grows flowers
Thanks for writing. If your plant prefers part sun, that usually means it does best in a spot with morning sun and afternoon shade. If yours is getting afternoon sun, it'll probably help to move it to a spot where it's protected from the hot afternoon sun.
Also: If you just purchased it from a greenhouse, it may need to get adjusted to direct sun --- if this is the case, the new leaves shouldn't be affected as much by the sun.
---Justin, Senior Garden Editor, BHG.com