I made the switch to jacks 321 from fox farm. I was doing good with ff but that was expensive usi g all there lineup. And i had to battle deficiencies. All the hype on jacks 321 snd the pictures produ ed from it i decided to try it out. Whats your experience or recommendations with it?
14 Likes
I don’t see nute burn issues, it’s easy to mix, grows good cannabis. It’s also much less expensive. I do recommend silica as it’s not present in the line.
13 Likes
I have used Jacks 321 and now TAP for my current grow for two years. I follow Jack’s published feeding schedule for both 321 and TAP. I grow in coco and perlite. I run a couple autopots and also top feed a plant or two. There are a lot of us out here.
I initially started using the 3.6 / 2.4 / 1.2 standard mix. But then everyone seemed to modify it and tweaking it so eventually decided to use the published schedule. No issues using it other than I have to either add Epsom or not decrease it ratably if I want to reduce ppms (mix at 75%)
12 Likes
I used it for a grow, and will be using it again in an upcoming. Its alot easier to use then FF, I dont know if id say its better. See alot of growers use it with coco and rave about it. Dont use coco myself at this time.
7 Likes
I’ve used jacks for a few grows now always used it at the recommended dose and did well with it. I have a grow that I’m just getting started with jacks. I cut the ppm’s back the seedling are looking good and strong.
5 Likes
I second all of the above. I based my feeding of the kootmed chart above. Cheap, easy to use and hard to beat. I’m a proponent of extra P and K during flowering. First run with Jack’s I used MKP (2/2.7/2/1.2) the first three weeks of flower. Next time I’ll do that for two weeks then use big bud powder weeks 2-5.
I used the new recommended blend 3.79/2.52/0.99 and it worked well. Had to up part B 0.2g for one plant for a while but otherwise I didn’t have any issues. No flushing, no salt buildup, perfect runoff numbers all the way through.
8 Likes
Jacks is great, the end.
Purchase at growgreenmi
7 Likes
I buy 6 lb combo packs on ebay.
3 Likes
What is this mkp? Ive seen multiple people mention it
5 Likes
I spy sisal 
I use that shit every where too
Plants looking great 
3 Likes
How do you have that light that close? Do you have it dimmed way down to do so?
2 Likes
It’s just a 4’ bank of T5 fluorescent grow bulbs that are heavy on the white and blue for tight node spacing and almost no heat. Call it my garbage veg light on a shoestring budget.
What I use in my flowering tent is a horse of a different color. Would never dream of getting the light that close to the zkittlez. They have corca 4 weeks left.
7 Likes
Mono potassium phosphate is a phosphorus and potassium fertilizer. Some growers run a modified Jacks 321 and MKP the first 3 weeks in flower to boost the PK 
8 Likes
My current plants are being fed at 50% 75% and 100%. It is strange, they must not be heavy eaters. In the past I pretty much ran 100%. This time it is the exception.
She is a big plant and happy but doesn’t need 100% very often.
3 Likes
Nice looking plant. Im at 50% in the seedling stage (525ppm) next watering I’m going to knock it down to around 350ppm see what happens then work my way up.
1 Like
Do you have a suggestion on what to buy?
3 Likes
I use jacks Bloom Boost 10-30-20 and Jacks part B the 1st 3 weeks of flower then transition back to 321, the last 3 weeks I use jacks Finish 7-15-30 and part B and water feed the last 2 weeks before harvest
5 Likes