Bleached buzz cuts are a wild, attention-grabbing vibe and they need a little planning to keep looking sharp. For me, the sweet spot for touching up roots is roughly every 2–4 weeks. Hair grows about a centimeter a month, so when your hair is clipped close to the scalp the contrast between bleached hair and natural regrowth becomes obvious faster than with longer styles. If you keep your buzz at a skin or 1–3 mm length, expect to see noticeable regrowth in about two weeks; if you like a slightly longer buzz, you can stretch it toward three or four weeks.
That said, bleaching is rough on hair and the scalp, so I try to balance aesthetics with health. I stagger touch-ups — a full re-bleach every 3–6 weeks is manageable, but I often do root-only touch-ups sooner and skip a session if my scalp feels raw. Between bleaches I baby my hair: weekly deep conditioning, protein treatments sparingly, and a purple shampoo once in a while to knock back brass. I also shield my scalp from sun and chlorine, since those accelerate damage and weird tones.
If you're DIY-ing, use lower-volume developer for sensitive skin and do a patch test. Professionals can deliver cleaner tone and less damage if you want a brighter, more even blonde. Personally, I prefer the slightly lived-in, sunkissed look that lets me wait three weeks — but when I want that icy, uniform platinum, I book a salon touch-up every two weeks. Either way, listen to what your scalp and hair are telling you; comfort over perfection keeps it fun.