Under developed buds?

sembrano molto lontane dall'essere pronte, devono ancora sviluppare i calici e fare il bulk, a occhio posso dire che hanno finto lo stretching e stanno entrando nella fase della VERA costruzione del fiore. Le tabelle di nutrizione sono pensate per un VPD ottimale in tutte le 24h, se però il tuo ambiente non è stabile abbastanza, le piante non riusciranno ad assimilare quello che c'è scritto ed il terreno accumulerà nutrienti. Tuttavia lo stato di salute delle tue piante non mi sembra affatto critico, non vedo evidenti segnali di overfeed. Lo stress in fase vegetativa, puo' causare problemi strutturali (es. pianta piccola, rami fini ecc), non dei ritardi nella maturazione... quindi non credo dipenda da questo. Quello che vedo sembrano piante alla 4 massimo 5 settimana di fioritura, se così fosse, è tutto nella norma e hanno ancorà metà fioritura davanti... se pero' sei alla 6/7 settimana e le condizioni sono queste allora si... c'è stato un rallentamento durante la fioritura

That plant shouldn't be done in 2-3 weeks. You are relying on bad information and ignoring the reality in front of you. Use deductive reasoning, not inductive dreck. It's not your fault. Sellers lie, lie, lie to sell more seed and take more money. Keep it healthy. Adjust what you provide through fertilization based on the plant in front of you. Again, don't rely on what 'should be.' That'll lead to un-ending problems that would otherwise be avoided with common sense. You might be half way through? so, 30+ days remain? The plant doesn't give a shit about your holiday plans, LOL, unfortunately. Autos takes teh same amount of time to flower as photos as far as flower phase length. The only difference is you don't control when it goes into flower. it does it on its own on its own time. Bigger autos vege a bit longer - ignoring traits of greater growth rates to make this simpler to explain. 2-4 weeks of vege and then 7-12 weeks of flower. Sure, you'll see 'some' autos finish in 8-9 weeks, but many will take longer, too. If you want to tightly control that, buy a photoperiod and do 12-12 from seed. It'll finish as fast or faster than most autos especially if it's a fast-flowering plant (not the marketing term which is also bullshit). Some plants takes 7 weeks, some take much more.. most will be 9-10 weeks of flower. to compare apples to apples, an autoflower goes into flower before your eyes can see it.. when you see preflowers, it was in flower the moment those were starting to form before your eyes could see the cell division occuring.. It's a misinterpretation to say autoflowers are 'faster.' They are not. they are just marijuana plants that are not controlled by the length of dark cycle.

THis looks like they are in flowering week 2 or so..........if this is photoperiod, when did you switch to 12/12??? If its an automatic, dont worry. And sometimes they take a week longer, so in 4 weeks an auto could look really different then;)

Yes, still 5-6 weeks to go.