Start by checking whether the leaf and skin pixels share a color range. A hue-based adjustment selects color, not the object you meant. If both contain yellow or orange, changing that range globally can alter the face even when the foliage looks right.
Diagnose the affected colors
Open an authorized source photo in Imagild's photo editor and keep an unedited comparison. Try a modest color adjustment before committing to an autumn look. Inspect the cheeks, lips, hair, wooden furniture and clothing as well as the tree. Mixed lighting can spread a nominally green leaf across several hue ranges.
The aim is not to force every leaf into one color. A believable tree retains variation between sunlit leaves and shaded branches. Very large saturation changes can hide that variation and make the background appear painted.
Restrict the change by location
If the global adjustment affects skin, return it toward the original and use a local adjustment over the foliage where the current editor exposes the needed control. Keep the selected region off the face and clothing. If that precise combination is unavailable, finish the separation in an editor with the appropriate masking controls; do not treat a generated portrait as a guaranteed selective color edit.
A fictional outdoor headshot needs a warmer tree but unchanged skin. First establish neutral skin from the source, then warm only the background. Reversing that order often leads to correcting a face that the foliage adjustment damaged.
Review edges and final size
At full size, check small leaves against hair and shoulders. At delivery size, inspect whether the warmth distracts from the person. A soft boundary should blend the adjustment without spilling warmth into the subject. Save the original and the chosen edit separately so a client can distinguish correction from a seasonal treatment.