Diluted Lucas formula ' OK or not?

[kaydeezee]

Hello RIU!

I'M about to hit week 4 12/12 'my plants are starting to flOwer up and I thought I would give the Lucas formula a go.

Is it cool to diluted the ppm of my mix?
I'm using tap water at 200ppm@.5 and when I mix up the ppm is 1200 at 1gal 'and that's to hit for my girls?

What I gave decided to do after not finding much info no this subject is to just add more water until my ppm came down to 900ppm? So I'm feeding the same ratio just at a weakend strength right?

Before if or get I'm also using 3ml calmag lol

 

[Trich_holmes]

Hello RIU!

I'M about to hit week 4 12/12 'my plants are starting to flOwer up and I thought I would give the Lucas formula a go.

Is it cool to diluted the ppm of my mix?
I'm using tap water at 200ppm@.5 and when I mix up the ppm is 1200 at 1gal 'and that's to hit for my girls?

What I gave decided to do after not finding much info no this subject is to just add more water until my ppm came down to 900ppm? So I'm feeding the same ratio just at a weakend strength right?

Before if or get I'm also using 3ml calmag lol

I take it you're in hydro..

 

[rkymtnman]

Hello RIU!

I'M about to hit week 4 12/12 'my plants are starting to flOwer up and I thought I would give the Lucas formula a go.

Is it cool to diluted the ppm of my mix?
I'm using tap water at 200ppm@.5 and when I mix up the ppm is 1200 at 1gal 'and that's to hit for my girls?

What I gave decided to do after not finding much info no this subject is to just add more water until my ppm came down to 900ppm? So I'm feeding the same ratio just at a weakend strength right?

Before if or get I'm also using 3ml calmag lol

you "should" be using RO or distilled water for the real Lucas formula.

you could also just mix up 5/10, 6/12 or 7/14 instead of 8/16 if you feel the ppms are too high

 

[kaydeezee]

Coco/perlite drain to waste
Week 8 from seed
Day 26 of 12/12

1x White widow & 2x sour-d

White widow started flowering under 18/6 after around 32days from seed, I didn't order AUTOS from (greenhouse seeds co) but thats what I think I got with this seed anyway. I had no choice but to go 12/12 once my sour 'd 's got to 14" tall because if the stretch wich is evident in the photos.
There is 1x 150watt led =55watts from the wall, 1x mars300 60/5w=140 from the wall, total 195watts , 6000lumens covering the white widow.
Widow is 26" tall 20"wide

The sour-d's are under a 5"cool tube reflector with a 400watt solar max flowering HPS , 55'000 LUMENS at 12"

Sour'd are becoming frosty as hell' and are 35"tall and 20"wide


Sour-D
The sour-d took 14days to start flowering . I flipped to 12/12 at 5wks 1day.

White widow

Ppm runoff is around 780@.5
Ph is 5.7/6.0 for all 3 plants on this lucas feeding scedual.

I have noticed the plants turn a realy dark green a lot in the past 2days since using this feeding?
They look healthy to me' is this normal or a nitrogen problem?

 

[rkymtnman]

in coco, you'd be better off using H3ADs formula for coco based on Lucas.

RO water, 6mL micro, 9mL bloom and 1 gram of Epsom salt per gallon.

that will cut down on your N too for the over- greening you are seeing.

 

[kaydeezee]

in coco, you'd be better off using H3ADs formula for coco based on Lucas.

RO water, 6mL micro, 9mL bloom and 1 gram of Epsom salt per gallon.

that will cut down on your N too for the over- greening you are seeing.

So I won't need any calmag product?
Background ppm 200@.5
2ml magnecal+
1/4 tspn Epsom
6ml micra
9ml bloom total ppm 900
Is this sounding about right?

 

[rkymtnman]

2ml magnecal+
1/4 tspn Epsom

it should be 1 gram per gallon Epsom. not sure what that is in teaspoons. better check.

skip the magnecal since you are getting the Mag in the Epsom.

you "shouldn't" need to add Ca with H3AD's formula.

 

[kaydeezee]

it should be 1 gram per gallon Epsom. not sure what that is in teaspoons. better check.

skip the magnecal since you are getting the Mag in the Epsom.

you "shouldn't" need to add Ca with H3AD's formula.

I own some digital scales that measure in 0.000 so I should be good to weigh out a gram.

I've got to rig a drip system or something' watering by hand every day and removing runoff is a pain 'even with 3 plants lol
They do drink about 2litre a day and I water to 30/40% runoff to avoid salt build ups and having to flush every few weeks thanks for the info

 

[kaydeezee]

Question: so 'say I've noticed some waxy looking leaves that are dark green & very dry to the touch, do I consider I have a imbalance of nutrients in my media?
If so, do I weaken the mix by adding plain water to lower the ppm? Or do I flush with a low ppm of say 500@.5 until my ppm has dropped to the desired level?
I'm thinking 'because I'm in coco/perlite it will be easier to flush out the previouse nutrient mix I gave the day before buy just adding the new diluted mix I have made up with adding the extra 2litre of plain water to the existing 8litre mix?

My tap water has a decent amount of calcium & magnesium at (61mg/l of CA) & (9.8mg/l of MG)
I'm not a numbers guy so I'm unclear how to impliment this in to my feeding ratio?
Tap water ppm is 200@.5 Ec 0.4
After adding 2grams Epsom 2gal water
12ml micra & 18ml bloom.. my ppm comes out at 850ppm EC1.7
Are these number OK or a little high due to the tapwater?

 

[rkymtnman]

Tap water ppm is 200@.5 Ec 0.4

that is very hard water.

any way you could pick up some RO or distilled to use for a week or so?

850ppm EC1.7

just to let you know, i've never gone above 1.2 for my whole grow.

if the RO or distilled is not an option, maybe just try 6/9 per 2 gallons which should drop your EC to a better level.

that dark, waxy look is over feeding for sure. a google search found this: Actually, dark waxy green leaves are really a sign of nitrogen toxicity(overfertilization).

 

[rkymtnman]

@kaydeezee
the other thing you can try is to get hard water GH micro instead of the regular micro. that might help too.

 

[kaydeezee]

that is very hard water.

any way you could pick up some RO or distilled to use for a week or so?

just to let you know, i've never gone above 1.2 for my whole grow.

if the RO or distilled is not an option, maybe just try 6/9 per 2 gallons which should drop your EC to a better level.

that dark, waxy look is over feeding for sure. a google search found this: Actually, dark waxy green leaves are really a sign of nitrogen toxicity(overfertilization).

My water seems to be high in calcium and low in magnesium?
Maybe I'll try 1gram epsom for 10 litre's of water &the same for the 6/9 ratio ? See if I can drop the ppm to around 600/700@.5?

 

[kaydeezee]

@kaydeezee
the other thing you can try is to get hard water GH micro instead of the regular micro. that might help too.

I'm already using hard water micra

 

[kaydeezee]

Plants don't look all that bad ,so I'm not going to do a super flush and put stress on the girls ,I'll see if this method works? I'll know by tomorrow or day after

 

[rkymtnman]

Plants don't look all that bad ,so I'm not going to do a super flush and put stress on the girls ,I'll see if this method works? I'll know by tomorrow or day after

i'm not a fan of coco but when and if you flush, you are supposed to use a very light nute feed, not just plain water. not sure if you knew that or not. i made that mistake and it took them a while to recover.

i think that 600 ppm target should be good.

 

[kaydeezee]

i'm not a fan of coco but when and if you flush, you are supposed to use a very light nute feed, not just plain water. not sure if you knew that or not. i made that mistake and it took them a while to recover.

i think that 600 ppm target should be good.

I can just dilute with plain water though yes?
Ppm 900 add 2 litre later ppm 650? Sound about right to me from the range you suggested?
Would I just decrease the amount of water of I want a higher ppm from the same ratio if the plants get a little pale?

 

[boilingoil]

Although I don't use the lucas formula or H3ADs formula. I never feed my coir dtw over 550 ppm ( .5 conversion) with most feeds in the 400-450 ppm range. I also don't use a cal-mag supplement with my ro water.
When I first started using coir I was using 400 ppm well water with 280 ppm of that being calcium carbonate. I ran that mix at 900 ppm but the biggest trouble was with the amount of pH down you had to use to offset the high amount of carbonates in the water.
Here's a few shots of plants grown with the well water in coir.

 

[kaydeezee]

Although I don't use the lucas formula or H3ADs formula. I never feed my coir dtw over 550 ppm ( .5 conversion) with most feeds in the 400-450 ppm range. I also don't use a cal-mag supplement with my ro water.
When I first started using coir I was using 400 ppm well water with 280 ppm of that being calcium carbonate. I ran that mix at 900 ppm but the biggest trouble was with the amount of pH down you had to use to offset the high amount of carbonates in the water.
Here's a few shots of plants grown with the well water in coir.View attachment 3934895 View attachment 3934896 View attachment 3934897

They look good man! So is 280ppm 280mg/l ?? Im learning the meanings if it all and hit some bumps along the "self teaching path lol

 

[TheChemist77]

what exactly is the lucus formula??? ive heard the term being used alot lately but im really unsure what it is,,, somthing about the n-p-k being 3-2-1???

i use gh maxi series for many years but ive recently purchased the j.r. peters jacks classic citrus 20-10-20 and potassium sulfate 0-0-45,,,that i intend to try out at 1/4 tsp per gallon.. my tap water has a ph of 7.0 and 70ppm..
20-10-20 at 1/4th = 5-2.5-5,, add the potassium and its 5-2.5-16...no where near 3-2-1

 

[rkymtnman]

what exactly is the lucus formula???

http://www.angelfire.com/cantina/fourtwenty/articles/profiles.htm