The "trim every 6 weeks" rule you've heard your whole life was developed by hairdressers to maximize salon visits — not based on hair biology. The real answer is more nuanced, and depends on three factors: your goal, your hair type, and your chemical history.
If Your Goal Is to Grow Your Hair Longer
Trim every 10–12 weeks. Split ends don't "travel up" the hair shaft as fast as stylists claim — but they do make hair look thin, dull, and ragged at the ends. A trim every 3 months removes split ends before they worsen, while maximizing length retention.
Important: A hair trim should remove no more than 1–1.5 cm. Anything more is a cut, not a maintenance trim.
If You Have a Specific Style to Maintain (Bob, Layers, Fringe)
Every 6–8 weeks. Precision cuts with sharp lines — like a blunt bob or structured layers — grow out quickly and lose their shape. Bangs in particular need attention every 4–6 weeks.
If You Have Chemically Treated Hair (Rebonding, Color, Perm)
Every 8 weeks. Chemical processes temporarily weaken the hair shaft. The ends are typically the oldest, most-processed part of your hair and deteriorate faster. More frequent trimming prevents the gradual fraying that travels upward over time.
If You Have Natural, Unprocessed Hair
Every 12–16 weeks. Healthy, unprocessed hair can go significantly longer between trims without visible damage. The key is moisture — keep ends hydrated with leave-in conditioner and oil, and they'll last.
The Split-End Test
Before booking a trim, hold a single strand up to a light source. If the end is splitting into two or three, it's time. If it looks uniform and smooth, you can wait another 3–4 weeks.
Sir George recommends scheduling your trim during your treatment appointment — two services in one visit keeps your hair calendar efficient.