New Rose of Sharon Yellowing Leaves: Underwatering Most Likely

Newly planted rose of sharon (2 weeks) shows yellowing/dropping leaves, irregular dark spots (like burns).

Primary Cause: Insufficient Water

New shrubs need water every 2-3 days for months. Burn marks = desiccation. Full sun, good drainage required.

Secondary Check: Fungus

If water adequate, spray neem oil (organic fungicide/insecticide/miticide). But check water first—most likely culprit.