Nute deficiency???..Lucas Formula..Pics

[killa killa kk]

I have 5 clones in an ebb and flow system they are about 3 weeks old and im using the Lucas formula. I am using a 400 watt mh for veg. My ppm is 446 I started nutes 2 and half weeks ago so ive been slowly ramping it up to where its at now. Most of the plants have yellow tips on them but one of the trainwreck clones has gotten quite a bit of yellow on it...any advice..Am I under feeding them. magnesium def ?..Oh and my ph has been steady at 5.7. They are fed 5 times a day..Any advice would be a huge help

 

[Aerohead]

Do you use Cal Mag? Are you running tap or R/O water? You should have no defs running 446 ppm at that stage of growth unless you don't have the water source worked out. I run 500-600 ppm in full flower...

 

[jammie]

hey there killa- doesn't look too bad to me. although a ppm of 446 shouldn't be too high, it does look like mild nute burn. flush and then back off to 350 and see how it goes for a couple of days. calmag plus with iron gets absorbed well by dilute foliar spray. that would cover a deficiency

 

[JAY LENWEED]

Yeah dude I agree with jammie flush the plants then spray the plants with a fert like thrive alive green and they should quickly recover in a week or so . Good luck !

 

[killa killa kk]

alright, Yes its Ro water, How long should I flush for?? 1 flood or drain cycle? or 24 hours of cycles? I can get some cal mg, I was afraid its a mg deficiency

 

[Aerohead]

Have to use Cal Mag with R/O, this makes sense, Your ppm are a little strong but not worth flushing unless your water volume is very small. Get some Cal Mag in there...

 

[bbing]

Lucas works best in full hydro at lower ph (imo). 5.7 should be in the zone. True Lucas fx will run the plants a tad N def. They look adequately greened, no more N and easy on putting anything that will add N to already burned leaves (including CalMg). A little zyme will help damaged tissue repair. You should add CalMg to base-mix...sometimes I use couple tablespoons ofEpsom (Mg only) in recirc hydro systems when Ca toxicity can be a prob....

I think lighten the feed first fresh batch...then chase any def.

At this point they looked a touch burned but nothing that wont bounce back if you get your feed under control.

 

[killa killa kk]

its only a 12 gallon reservoir so I can flush it very easily. How many cycles do I run straight water thru it??Or do I just flush it just once?? I will have to get some cal mag on monday when the hydro shop opens back up

 

[killa killa kk]

Aerohead...You said you only use up to 600 ppm in full flower..I thought you are supposed to go up to 1300 why so low??This is my first time using Lucas

 

[FreezerBoy]

No one pH reading allows for equal absorption of all nutes. By maintaining a flat pH you force unbalanced feeding, too much of this, too little of that. Allowing a small swing in pH, say 5.5-6.0 will make for a happier plant.

That said, don't stress yourself out. They look pretty good.

 

[killa killa kk]

Alright, thanks freezer, My ph has swung a little bit here and there but I just didnt want people saying my ph might be a little off wack as a reason for the tip burn and slight yellow dis coloration of my trainwreck clone

 

[Aerohead]

Aerohead...You said you only use up to 600 ppm in full flower..I thought you are supposed to go up to 1300 why so low??This is my first time using Lucas

Killa, ppm's are misleading, because it depends on what brand your meter is. I use a Hanna meter that also does E.C., 500 ppm's on my meter could be 700 on someone elses.

I go by the E.C. readings and I run between 1.0 and 1.2, I converted it to 500-600 ppm's so it was easier to compare to yours.

Running low ppm's allows me to basically hand feed the plants nute doses as needed rather than droppin in a bunch of nutes and hoping they eat right. I have found better yields, taste, and overall better quality smoke from running low ppm's...

 

[bbing]

When you say Lucas formula....
..You mean the traditional fx or a one like Rez's?

I like Rez's twist like 5-10 then 8-16 w/ koolbloom

nice thing about Lucas is the 1-2 ratio can be diluted w/o throwing the profile off. Cool it off: just add H2O

What brand nutes how do you dose?

600ppm would absolutely starve most the strains i run in late flower...(well, not starve but surely a slow flush )

the burn is not from ph out of range...and you dont appear to have excess N (lil light and ca def if you ask me)

a flush will rid media and root mass of excess salts holding...it really only takes one cycle (how long are your flood cycles?)

but be sure not to flood halfway up or just to the top, you want get the hot stuff out not push it to the surface roots.
good time to dump and clean resi mix fresh tub;

check your nute expeeration dates and/or they have gone off

 

[zachrockbadenof]

600ppm would absolutely starve most the strains i run in late flower...(well, not starve but surely a slow flush )

interesting u say that... we are running waterfarms, well water (no deceirnable ppms) 6.0 out of the tap.. using a nutrawand, we ph the water down to 5.5/5.6, add canna nutes, bring the ppm's upto 450/500, and at that level the ppm's stay fairly level... ie eating an equal amount of water/nutes... and the ph drifts up to 6.0/6.1 over a few days, when its time to refeed the ladies... how the hell do u guys feed at these 1000/1200/1500 levels????

maybe its the variety u guys are running, but we are usally running a bunch of rez's beans.. for instance this time some strawberry diesel sdibl, some chemdogs, and some of mr nices ssh.. certainly a few of em are heavy feeders... they ladies seem happy at 450/500... maybe its the conversion rate?? but 450 vs 1200/1500 seems to much of a dirfference

 

[FreezerBoy]

Some strains are hungrier than others. Plants with 1K lighting feed heavier than those under a 150. And some just like to cram nutes down the throats of their plants.

Rather than match a chart or some other grower, talk to you plants and they'll tell you what they want.

EC up, pH down is too rich.
EC down, pH down is too lean.

When you can get pH to drift from 6.0-5.5 (or the other way around) over the course of a week or two, then the amount of too rich or too lean will be too little to worry about.

 

[killa killa kk]

bbing. It is just the standard lucas formula. I started with a 2/4 ratio a couple days after transplanting and have slowly worked up to about 445ppm. My water was originally 62 ppm so its more like 380ppm if I would have stepped up to 8/16 cause I have HIDS they would burn like crazy. I checked out REZs formula awhile ago and have still considered it. im just getting started with the Lucas formula after reading soo much information on it and im sure I will be adding something in down the road to dial it in exactly how I want but need to start off simple. My flood cycle takes 5 min long and only sits at the top level for about a minute before It drains. I will run some RO water thru them and start over with nutes later today..

 

[Dankgravy]

Wow this many responses and not one of you actually know what Lucas formula is!!!????

There is no such thing as running Lucas formula at 450ppm. It is ran at full strength 1200ppm(2.0 ec) from the day the clone has roots. That is where your problem is.

 

[Saran]

Wow this many responses and not one of you actually know what Lucas formula is!!!????
There is no such thing as running Lucas formula at 450ppm. It is ran at full strength 1200ppm(2.0 ec) from the day the clone has roots. That is where your problem is.

Course thats relative to your water but I do agree with your Point.

I run the Lucas formula with Floranova @ 8ml per gal thats FULL strength Lucas I hit a little over 800ppm on a Hanna using the .5 scale thats between 1.6 & 1.7 EC .

Base water is Tap @ 6.8 ph with 40 ppm TDS

 

[Aerohead]

Wow this many responses and not one of you actually know what Lucas formula is!!!????

There is no such thing as running Lucas formula at 450ppm. It is ran at full strength 1200ppm(2.0 ec) from the day the clone has roots. That is where your problem is.

I have been running lucas for over 20 years, I know what it is...

 

[Dankgravy]

My apologies. I only made the assumption because no one told him what Lucas formula actually was..