How Long Should I Wait After Radiesse Injection to Have a Mini Face Lift? 6 Months?

A "mini lift" can be performed at any time following Radiesse treatment of the nasolabial folds. The mini lift procedure does not involve the nasolabial fold area and will not disturb the areas treated with Radiesse. Regardless of when you choose to pursue surgery, seek a plastic surgeon who specializes in facial cosmetic surgery and has extensive experience in facelift procedures.
Best,Stephen Weber MD, FACS

A mini lift will not affect the nasolabial folds to any significant degree. If your hope in having the lift is to avoid more treatments for this area, you will most likely be disappointed.  There are longer acting fillers such as Artefill, which can last 5-10 years.  Best of luck.