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Dankworth,
Don't know if I agree that bigger plants need different ratios, my experience has not shown that. Yosemite grows decent sized plants with his formula over a p per plant I think.
Wonder about this tho; about how cutting coco with perlite or hydroton changes nute requirements. Seems like maybe not since perlite and hydroton are fairly inert?
Ttystick,
I'm using Jack's and Cal nit and love it even though I managed to muddle it up in my haste this first run. I started off running a ratio of 2:3:1 . . . Jacks/Calnit/Epsom and my plants looked super healthy so it took me second to realize my mistake. Most run a 3:2:1 or 3:2:.5 or just 3:2 ratio. A 1:1 might be okay for veg and early flower but 3:2 is better for bloom for sure and maybe veg too. I started out using Epsom salts but will try dropping them based on YosemiteSam saying that Jacks already has near the upper limit for Mag.
Funny thing was my plants looked super healthy with 2:3:1 but by week 5 I realized my bud size was not what it should be and my plants were producing a tremendous amount of healthy leaf. So I switched it up to 3:2:1 at half strength and added MOAB at 1 gram per gallon and things have responded.
I am in about 60% perlite 40% coco and have been running my ppms (500 scale) at about 800 to 1200 prior to week five and about 650 with MOAB.
Yosemite was using Jacks with no boosters in coco but switched to salts to get a more coco specific formula. He told me that his yield did not go up with the switch but his quality did. He also foliars with calcium 25.
I might stop using Epsoms as Yosemite pointed out that Jacks already has the upper limits of Mag.
Jacks and calnit is super user friendly. Plants love it.
Wonder if anybody on the Farm has ever used Magnon grow or bloom from AmericanHydro? A and B two part dry nuts. Interesting looking stuff. They are from Humboldt and have been around for a while but don't sell exclusively to the cannabis market. They carry some interesting products. There Companion product is the shit if you want b.subtilis.
the 2-3-1 is the veg formula for jacks for sure. That's about what I was running until a couple weeks in to flip. Then switch to 3-2-1.
Those notes on YS formula are from quite a few months back. It is very possible he changed things since then. I have not looked at ICMAG in a while.