Jack's RO k.i.s.s.

I always seem to erratically pop beens so I normally have multiple strains at different ages going at any given time. The issue is I hate to water/empty runoff and honestly am just too lazy to mix a half dozen different feed ratios for each individual plant.

I've been testing different nutes over the years in search of one that I'm able to get dialed in and feed the same strength throughout the entire grow. (Veg and flower starting week 2 of popping)

I started using Jack's Ro formula about 3 months ago when I switched from 3-5 gallon hempy buckets to 1 gallon dtw 70/30 coco/perlite.

I figured I'd go ahead and start this journal to keep track of things so here goes...

I'm using 1.5ml/gal Calimagic and 1.3ec Jack's for a total of 1.6ec. The tents are between 81-85F with lights on and vpd set at .9 for veg and 1.3 for flower. Feed/drain is all automatic ranging from 2-6 times daily for a max of 1 gallon a day per flowering plant.

First up at 11 days old is a white label Blue Dream and a G13 Labs limited edition Strawberry Eclair that I plan to keep a few cuts from.


Next at day 20 is an Expert Seeds Green Crack that I topped today and white label Godfather OG that started out lime green and has a nice weird striped pattern now that color is coming in.


Last at day 21 flower is a white label Blue Cheese I supercropped yesterday and an Expert Seeds Zkittlez Glue that refuses to strech.



I was running around 1.5-1.6 ec on the Jack's until a week or so ago until I started to get the tip burn you can see below so that's why I've settled on 1.3.


I'll try to keep updating as best I can with any needed changes.

Have you read H3ad's formula for coco?
Based on the Lucas formula.
He recommends 1 gram Epsom per gallon.
Don't see any deficiencies in your photos the plants look good.
I use 1.5 ml Calimagic and one gram Epsom Salts and my base, using RO also.
I switched from Canna nutes to GH Flori series a few years ago, but I am very interested in Jack's, sounds so easy!

gr865 said:

Have you read H3ad's formula for coco?
Based on the Lucas formula.
He recommends 1 gram Epsom per gallon.
Don't see any deficiencies in your photos the plants look good.
I use 1.5 ml Calimagic and one gram Epsom Salts and my base, using RO also.
I switched from Canna nutes to GH Flori series a few years ago, but I am very interested in Jack's, sounds so easy!

Click to expand...

I read about h3ads a few years back when I was trying out the GH trio line.
Jacks recommends .99g per gallon along with their RO formula just like the do for their 3 2 1 line so I add that in with the nute mix.

I'm running the calmag because admittedly I bought some basic brick coco off Amazon and even though I buffered it before use I'm worried about it still leaching some Ca out of the feed. I've also had some calmag issues with Jack's in the past but I think that was more due to feeding to little in the early stages and having ph to low for seedlings and early veg.
I'm now running 6.0-6.2 until week 3 of veg to allow more calcium uptake and then drop to 5.8-6.0 for the rest of the grow.

So far it seems to be working. I'll be happy if they still look this way come week 5-6 of flower.

As far as ease goes, if this RO formula works it's by far the easiest/cleanest nutrients I've tried. Just mix a gallon of concentrate at 1/100 ratio add the 1.5ml per gallon of calimagic to the rez and top off with the Jack's till the EC pen hits 1.6. Rinse and repeat.

I ended up culling the Zkittlez Glue and Godfather OG. They didn't look like they were going to produce well so I didn't want to waste the time.

I finally got in an order I'd been waiting for. 20"x20" trays for the 2x2 tent. It should give me enough room to keep a few cuttings etc in there and still have automatic drainage. I used a hot knife to cut in a drain fitting from my floraflex system. Pretty happy how it turned out.

I'm going to give everything a couple more weeks and once they're all in the flower tent I'm thinking about dropping one of the new sativa beans I recently acquired. Looking at either Super Lemon Haze, Chocolope or Strawberry Cough. Got a few weeks to decide so no rush.