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zipcode · August 6, 2020

There's a very slightly huge problem with your calculation.
This makes x gallons of that, is just not equivalent at all between the two. I can't make a super correct comparison, since I don't have the density of TTF (the analysis is based per weight, but the ttf is bought per gallon).
But assuming a density of 1.3 and referencing all values to K (which gives ttf the biggest advantage, since it has proportionally more compared to N),
1gal ttf = 1gal water * 1.3 = 4.9 kg
1.5 lb = 680g x 21/ 6.7 = 2.12 kg ttf equivalent

So 1 gal of ttf is 2.31 packs of MG in terms of pure NPK referenced to K, or 1.63 packs referenced to N. Now TTF could have a bit more advantage because of humic acids and stuffs but the price advantage leans heavily towards MG.

August 6, 2020	#3
zipcode Tomatovillian™ Join Date: Jun 2010 Location: Romania/Germany , z 4-6 Posts: 1,582	There's a very slightly huge problem with your calculation. This makes x gallons of that, is just not equivalent at all between the two. I can't make a super correct comparison, since I don't have the density of TTF (the analysis is based per weight, but the ttf is bought per gallon). But assuming a density of 1.3 and referencing all values to K (which gives ttf the biggest advantage, since it has proportionally more compared to N), 1gal ttf = 1gal water * 1.3 = 4.9 kg 1.5 lb = 680g x 21/ 6.7 = 2.12 kg ttf equivalent So 1 gal of ttf is 2.31 packs of MG in terms of pure NPK referenced to K, or 1.63 packs referenced to N. Now TTF could have a bit more advantage because of humic acids and stuffs but the price advantage leans heavily towards MG. Last edited by zipcode; August 6, 2020 at 04:36 AM.