Miracle Grow - question about mothers or people wanting to do long grows.

Ok, so I've been following Buds 4 Less pretty faithfully, and have been amazed at how miracle grow actually works pretty well for soil growing. However, because miracle grow has the included nutrients for 3 months feeding, what happens after those 3 months?

I mean, lets say I wanted to keep a mother in miracle grow, or I decided to do a longer grow that lasted more than 3 months total. Could I use the regular miracle grow feed that has the same front label on it as the soil I bought?

Anyone (including Garden Knowm) who has used miracle grow soil or feed...please help me out..

Thanks.

you could, woodnt turn out to great, stuffs not really too good for marijuna at all
theres a lot of better nutrients out there, well pretty much all of em
but if your gunna add nutes to miracle grow soil, watch out for ph problems
many a grower using mg over-nutes and gets nasty acidic soil