Transition Veg to Bloom Nutrients?

For MY autoflowers (and they're all I grow), I start feeding them bloom nutes from the get-go along with veg nutes... so for ME, the question is "when do I taper off the grow nutes and go solely with the bloom nutes" ... I start tapering off the grow nutes when they go into pre-flower (and boost the bloom nutes) which is usually Week 4 or 5 from germination ... then by week 2 of actual flower, I cut my grow nutes off completely and add additional bloom nutes that have just a touch of nitrogen in them... Hope this helps - good luck!