pukka blues 3 plant 400w hps grow

hey this is my 1st grow im growing 3 pukka blues in soil under a 400w hps lamp. i was thinking of letting them veg to 2ft or so b4 flowering as i was told the taller the plant the better the yield, is that true? during ive got them in 18L pots and i plan to use bud blood and dr hornbys big bud through the flowering stage, if i was to flower at 2ft using the said nutes wot size yield do you think i could be looking at? i know you can't really predict yield size but through experience if all goes well wot would you estimate it at?

if it sounds long winded its cos im baked to death

pics bro its why we have the internet. if i wanted a novel id buy a book

look up the strain and measure your plants if there a meter which is like 3.3 feet each tall by wide then you will get the amount it says it will yield in 1 meter square. but you prob wont get that full amount from first grow. i don't know what ur strain is. i have 4 footers trellised really hard and i dont know what im gona yield.

Pics coming tomoz possibly just moved shits evriwhere lol there in wk 5 of veg

here you go people let me know wot you think, comments advice and questions welcome

Looking good man...nice and healthy!
Keep up the good work!
Peace

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these are all the same plant the others aint no good yet hope next grow is better lol