New Grower auto's flowering early?

[obeymybud]

Hi new here looking for some help really liking what i have seen on here so far. So i will start at the beginning basically i start my autos under a vho t5 in 3gal air pots then move them under my magnum+2 i had 3 dp blueberry's all 3ft plus huge buds very happy. then i do 5 mi5's all stayed 12'' and seemed to flower at wk3 and stoped all growth with all most zero side branching. did 2 ultra lemon haze both 3ft plus happy again. now i have 2 g13 P.E at wk5 just showed sex and looking good but i also have 2 purple kush and a blue mammoth at wk3 that have showed sex and starting to flower with no side branching whats causing these dwarfs? water is ph'd cyco nutes seeds started in jiffy pellets lights are 18/6.

 

[obeymybud]

bump

 

[greengherbs]

Good question...... I would say Genetics :smokebuds:

 

[DubV]

There is a lot of factors that can cause stunting but also there are a lot of single cola short pheno autos as well bro. Light height, humidity, over watering can all cause stunting but I have questions. Did you switch nutes from grow to flower at the same time on all of them? Also what kinda medium are you growing in bro?

 

[obeymybud]

Im using 1bag happy frog to 1bag OF right now, I was using sunshine #4 when i did the MI5s seemed like a bad choice so went back to . As for the nutes i run the bloom till they show sex then flip to flower.

 

[DubV]

First off don't switch from grow till bloom nutes until vertical growth stops. If you do, this can cause the plant to stop vertical growth and limit yields. I typically switch between weeks 6-7 but you can go as early as 5 weeks. Interested in why you didn't like sunshine advanced #4? I am using some now and I quite enjoy not having to water as much but I can not ppm read it because of the wetting agent. That mix should be fine but be careful as the ffof is hot for seedlings.

 

[obeymybud]

I know i did have my lights up to far just brought them down yesterday. i guess the small mi5s left a bad taste in my mouth for the sunshine mix but had to other plants grow well in it. i have a few moby dick babys right now i will try out the longer run of grow nutes thanks.