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Originally Posted by Budley Doright

You should celebrate the fact this product was made for 'small indoor growers'

Jack's was not made for small indoor growers, it was developed for large scale greenhouse agriculture.

[Budley Doright]

I thought it was a hydroponic fertilizer?????

Here are the facts as I know them...

I grow using jacks and I also grow in hydro outside....

I would not use jacks in either a typical greenhouse or large scale anything...

The formulation is cannabis specific..... it has high levels of magnesium and sulfur that may be a detriment for other plants...

cannabis uses way more magnesium than about anything else.....

For hydroponic greenhouse I use scotts ..... which is almost the exact same formula but dont have jacked up magnesium and sulfur

Futher indication....when you compare the 2 fertilizers....

Jacks vs scotts....

jacks falls under mel franks fertilizer numbers where the scotts product does not...