Lucas formula off?

[truentgoon]

Correct me if I'm wrong guys because I may be wrong. Lucas formula is supposed to be.

8 ml micro and 16ml bloom
N - 100
P - 100
K - 200

Why is it that when I use a NPK calculator it comes out to.
N - 105.6
P - 92.8
K - 158.4

I got a more even formula with 10ml GH gro and 10ml FF tiger bloom.
N - 104
P - 104
K - 220

Like I said I could be miscalculating something because the Lucas formula is tried and true with GH bloom and micro. But when I use the calculator I get those numbers for some reason I don't get it.

Here's the link to the calculator that I'm using.

http://firstrays.com/free-informati...ion-of-fertilizers/fertilizer-tds-calculator/

 

[dongle69]

Try the original calculator:
http://www.angelfire.com/cantina/fourtwenty/articles/profiles.htm
Elemental ppm can be figured different ways.
Don't forget about Calcium, Magnesium, and Sufur.

 

[truentgoon]

Used the built in micro and bloom examples for that calculator and it came out similar. Still low in K unless that's what it's supposed to be. I'm nitpicking, I'll still use this formula regardless I just thought K was supposed to be 200.

N-130
P-106
K-161

 

[sunny747]

Not being a jerk, but wondering why not use veg nutes during veg and bloom during bloom.. I tried Lucas and just ran into N deficiency so went back to veg nutes...

 

[dongle69]

You are forgetting to add the K from the Micro.
Should be around 183.

 

[truentgoon]

Not being a jerk, but wondering why not use veg nutes during veg and bloom during bloom.. I tried Lucas and just ran into N deficiency so went back to veg nutes...

Why didn't you just put more micro in to raise nitrogen levels.

You are forgetting to add the K from the Micro.
Should be around 183.

Yeah I figured I was doing something wrong. Been doing Lucas for 2 feedings so far and the bottom leaves are turning yellow and brown like I spilled nutes on them. I didn't add calmag because people said they didn't need it with their Lucas but I think my coco needs heavy calmag along with with my strain being a heavy feeder. Last time this happened I gave it a good dose of calmag and things greened right up. Either that or nitrogen I may increase both with my Lucas.

 

[Dr. Who]

Why didn't you just put more micro in to raise nitrogen levels.



Yeah I figured I was doing something wrong. Been doing Lucas for 2 feedings so far and the bottom leaves are turning yellow and brown like I spilled nutes on them. I didn't add calmag because people said they didn't need it with their Lucas but I think my coco needs heavy calmag along with with my strain being a heavy feeder. Last time this happened I gave it a good dose of calmag and things greened right up. Either that or nitrogen I may increase both with my Lucas.

Ca/Mg to coco is a "needed" thing....basically put.

 

[Xs121]

I don' know where you got your info that you don' need ca and mg in LF. Growers who made that suggestion are getting their ca and mg from other sources such as their water and even Epsom salt.

If you look at GH Flora Series and using Lucas Formula...ca is around 100 ppm and mg is about 60 ppm off the top of my head.

It's okay to be a bit under or a bit over, as long as your ratio is still close to 1-1-2.

Cheers

 

[rkymtnman]

coco needs heavy calmag

you should be using H3AD;s formula for Coco. developed off the Lucas formual

6mL micro, 9mL bloom, 1gram/gal of epsom salt.

 

[truentgoon]

Thanks for the info guys how much calmag should I add? 1 tsp per gallon or double? Don't have Epsom salts on hand but it's pretty cheap can I just use calmag instead of epsom. I had 1 tablespoon of Dolomite per gallon mixed in with my coco I'm surprised I cought a calmag deficiency so quick.

you should be using H3AD;s formula for Coco. developed off the Lucas formual

6mL micro, 9mL bloom, 1gram/gal of epsom salt.

Really? I was wondering if I should use h3ads formula. I thought h3ads formula was 60mg of calmag.

Can I use calmag instead of epsom. Also I'm using FF tiger w/ GH gro to get the formula what are the ppms with heads formula I know Lucas is 100-100-200. Thanks for the help guys adleast now I know what I need now.

 

[truentgoon]

I don' know where you got your info that you don' need ca and mg in LF. Growers who made that suggestion are getting their ca and mg from other sources such as their water and even Epsom salt.

If you look at GH Flora Series and using Lucas Formula...ca is around 100 ppm and mg is about 60 ppm off the top of my head.

It's okay to be a bit under or a bit over, as long as your ratio is still close to 1-1-2.

Cheers

I'm using calmag plus do you think I need double calmag. Idk how I would get that ratio with calmag plus. Should I use Lucas or h3ad. I have low light too lol 3 big 2 month vegged plants under 150w hps. Should I use low light formula with calmag.

 

[sunny747]

Why didn't you just put more micro in to raise nitrogen levels.



Yeah I figured I was doing something wrong. Been doing Lucas for 2 feedings so far and the bottom leaves are turning yellow and brown like I spilled nutes on them. I didn't add calmag because people said they didn't need it with their Lucas but I think my coco needs heavy calmag along with with my strain being a heavy feeder. Last time this happened I gave it a good dose of calmag and things greened right up. Either that or nitrogen I may increase both with my Lucas.

I was using floranova so adding more N wasn't an option..