xtsho
Well-Known Member
Which Miracle-Gro are you referring to if I might ask?
The Pro Miracle Gro Group
PJ Diaz
Well-Known Member
Just the most common one, which has been around for decades. Any other product I would refer to specifically.
7CardBud
Well-Known Member
I'm in the Boston south shore, which isn't a very big agricultural area. There is still a conveniently located agriculture distributor in my area.
They didn't stock Jack's this year, but the numbers for Masterblend should be similar.
Masterblend Hydro 11.3kg - $58
Haifa Calnit 22.6kg - $38
Epsom 22.6kg - $32
(Base salt) 3.6g x 0.0051= 0.0183
(CalNit) 2.4g x 0.0017 = 0.0041
(epsom) 1g x 0.0014 = 0.0014
Price per gallon $0.0238
They didn't stock Jack's this year, but the numbers for Masterblend should be similar.
Masterblend Hydro 11.3kg - $58
Haifa Calnit 22.6kg - $38
Epsom 22.6kg - $32
(Base salt) 3.6g x 0.0051= 0.0183
(CalNit) 2.4g x 0.0017 = 0.0041
(epsom) 1g x 0.0014 = 0.0014
Price per gallon $0.0238
PJ Diaz
Well-Known Member
I'm not really sure what the comparable application rate of MG would be. The box says 1/2 tsp per gal every 2 weeks for indoor plants and 1 Tablespoon per gallon for outdoor plants, every 7 to 14 days. I think that in the spirit of fairness, we should just assume that 7 grams per gallon of MG is roughly equal to the "321" ratio above. If we run the math on that, based on a 10-pound bag of MG, it's $0.0339/gal, which is obviously a penny more per gallon than the quoted Masterblend costs. That said, I don't think it's quite a comparison, as you're purchasing nutes in bulk at 125 pounds total, vs a 10 pound bag.
xtsho
Well-Known Member
That is lacking calcium and magnesium. But it's formulated to use tap water and most contains Ca and Mg. Tens of millions of people have been growing healthy plants using it for decades. It's an all purpose fertilizer formulated to be used either with their soil which has Ca and Mg in pots or outdoors with plants in the ground where the soil is going to provide the Ca and Mg. It's not meant for the soilless growing many cannabis users do.Just the most common one, which has been around for decades. Any other product I would refer to specifically.
MG has a stigma amongst cannabis growers. They know that nobody is going to buy anything with MG in the name even if it's identical to other well known popular cannabis brands. Their move into the cannabis market was buying already established nutrient companies.
They do have their Performance organics brand which is a decent fertilizer and is a decent fertilizer for growing cannabis in soil.
xtsho
Well-Known Member
There's nothing wrong with Masterblend. It's almost identical to Jacks.
7CardBud
Well-Known Member
True...for the hobbyist grower using soil, the convenience and lower upfront commitment sells it.
The things I don't like about it is the urea formula which forces you to use soil and it's a veg only formula.
If I was going to do a one bag grow I would use a nitrate based general purpose formula with Calmag.
Something like this..
Not a huge up-front cost and much more versatile.
17-5-17 Cal-Mag Formula, 25 lbs - Progressive Grower
stnr420
Well-Known Member
I wouldnt....it would be nitrogen overload......look, i grew good outdoor weed in the 90's with nothing but 1/2 strength mg,tap water, and cheap soil....im only assuming i didnt run into deficiencies because of my tap water mineral content and whatever was in the soil...that being said....Imo, its just better to use salts that are full spectrum plant nutrition and meant to be combined....
Severed Tongue
Well-Known Member
I use the 24-8-16 and 15-30-15 blue salts.
This is the same as saying "3-1-2" and "1-2-1."
When using with Miracle-Gro moisture control 0.18-0.10-0.10 soil, it does work great, and I only used city tap water, never check pH, no cal-mag, no other additives (i did try seaweed extract one run as i got it as a gift, didnt see any difference). I fed with every 2nd watering, using 5 gal fabric pots, that was 4 litres every 3 days.
The only real issue was bugs, Everytime... 100% due to the Miracle-Gro soil.
One major difference noticed was when up potting from starter cups to 5 gal fabric pots, using mycorrhizae gave the plants a much more vigorous growth vs not using it.
This, my 8th run. I switched to 'promix hp mycorrhizae' for medium and the feeding every 2nd watering is not working..... My girls are just over 4 weeks into flower, and many fan leaves being consumed.
So it's not just the Nutrients but the medium you need to figure out as a combination.
I'm going to start feeding every watering and hopefully they recover but this has me looking at a different nutrition line for sure.
This is the same as saying "3-1-2" and "1-2-1."
When using with Miracle-Gro moisture control 0.18-0.10-0.10 soil, it does work great, and I only used city tap water, never check pH, no cal-mag, no other additives (i did try seaweed extract one run as i got it as a gift, didnt see any difference). I fed with every 2nd watering, using 5 gal fabric pots, that was 4 litres every 3 days.
The only real issue was bugs, Everytime... 100% due to the Miracle-Gro soil.
One major difference noticed was when up potting from starter cups to 5 gal fabric pots, using mycorrhizae gave the plants a much more vigorous growth vs not using it.
This, my 8th run. I switched to 'promix hp mycorrhizae' for medium and the feeding every 2nd watering is not working..... My girls are just over 4 weeks into flower, and many fan leaves being consumed.
So it's not just the Nutrients but the medium you need to figure out as a combination.
I'm going to start feeding every watering and hopefully they recover but this has me looking at a different nutrition line for sure.
7CardBud
Well-Known Member
Those MG formulas both use alot of urea, which performs poorly in Promix.
Severed Tongue
Well-Known Member
Good to know, I need help then, I started another thread in nutrients section, would love some guidance plz
Charles U Farley
Well-Known Member
Looks like a bunch of the contentious posts that used to be in this thread are gone, and that's a good thing.
I've been using Miracle-Gro potting soil, or whatever peat based potting soil was on sale, along with Peter/Jacks 20/20/20 for over 40 years. It's worked out okay for me:
I've been using Miracle-Gro potting soil, or whatever peat based potting soil was on sale, along with Peter/Jacks 20/20/20 for over 40 years. It's worked out okay for me: