what`s the NPK ratio for the MG fert? if it`s for roses then it may do for flower. for veg you want more "N" head for something like 6-5-5, which is the same as 12-12-10. for flower you want the exact opposite i.e like 6-7-8-the same as 12-14-16 you get the picture
. you also need secondary nutes-you should find a good all-round fert or mix(worm castings are a great additive) just make your own mix or buy a chemical fert with "chelated" nutes, which basically means available to the plant immediately.
Superthrive is a good additive but it`s no "wonder juice".
final size at harvest can be controled by how long you veg them for, like say if you veg for 4-6 weeks and they are around 1-2ft, they may double or even triple in size which could grow to 6ft by harvest:hubba: .
your using MG soil i believe, so there`s no need to add additional nutes untill the 2nd or 3rd week of flower,for which you`ll want to begin at half,maybe even quarter strenghth nutes once a week, and "gradualy" increase to full.
MJ can take up loads of ferts if built up in small steps.
always plan ahead and read the grow journals, that way you can`t go wrong as everyone has made the mistakes allready for you
make your ladies feel good and they`ll repay the favour 10 fold.
welcome to the world of growing your own, in no time (well about 12 weeks) you can join the "stoned for free" club.lol:lama:
oh BTW you`ll need a bigger grow space if your allready germing that amount of seed,dip your toe in first-crawl b4 you walk n` that...i`m well stoned forgot what this thread was about,lol.
good luck dude -Shuggy-