The Real Lucas Formula

CustomHydro

Well-Known Member
Alright I want to straighten people out on this formula before whoever decided to change it ruins more grows. Most of u know this as:
Flora- Micro- Grow
0-5-10 for veg and
0-8-16 for flower. No!!! It is,
0-8-16 for veg and flower under HID lamps and
0-5-10 for veg and flower under flourescents. Lucas never quoted different ml/gal for flower or bloom, only if u use flouros. Once u get a stabel set of roots and put plants under HID u can feed full strength. If u use 0-5-10 under HID lamps u will get deficiencies, . If u use this formula with water that has a higher PPM than 100 u will get lock out. If u want u can use Flora Micro for hard water but u will have to figure out how long it takes for too much Ca to build up and thro ur PH off, at that point u need to change the res and start over. That kind of throws the whole point of using this stuff out the window tho. Atleast for me, the reason I use this formula is so I dont have to change my res until the next grow.
It is a very simple formula to follow, but there are rules.
Another common mistake people often make is to add supplements. Supplements are not going to put yield into a plant that couldnt have achieved that yield w/o that supplement. They are only bandaids for poor practices and if u follow the formula rules supplements will only lead to lockout. The reason this formula can be so touchy is it allows u to grow thru 8+ weeks w/o a res change. Some people have completed three consecutive grows, veg and bloom using this method w/o changing the res once.
U won't even need to flush at the end if done properly, which gets me into another topic I will brief on. Taste is genetic, using organics will not improve taste! If u over fert it can hurt taste, but u can over fert with organics or chem ferts.
I'm not saying don't use organics for other reasons, but if u are doing it for taste u are waisting money. This is highly controversial because of some certain book publishers that don't know their ass from a hole in the ground, even if it had a huge bud plant growing out of it, decided to say that organics improved taste. I challenge anyone on this forum to prove to me that organics taste better, and don't say because Jorge C said it would. If u can find a way to make me believe I will listen, but as far as my grow idols say, and what I have experienced, organics are way over rated. Just because a chemical is formed naturally doesn't mean it is not a chemical. Plus chemicals that are made for growing are made to be completely available to the plant. With some organics u need to keep a bacteria colony in ur resevoir to compost the nutes to a plant viable form. For ex... Metanaturals, and Pure Blend Pro. The PBP doesn't need the bacteria, but it will help it. Metanaturals needs the bacteria for the nutes to work at all. Sounds like more work, arent we pot smokers, I like stuff to be easy and repeatable, don't u? If so quit using guess work to grow and then spend half of ur evenings searching the deficiencies threads to see if u can pinpoint ur problem. With this formula followed closely u can easily grow w/o deficiencies everytime, with any strain! It has been proven inside and out for years. The only people who bad mouth this formula are the ones that can't handle how simple it is and the ones that cant follow simple directions.

If anyone would like to debate this, or add something I would be glad to meet back here anytime.
 

CarbonBubblegum

Active Member
For real?
But what about marijuana needing different n-p-s on veg & bloom?
Does that not apply with the lucas formula?
if so, it must be less rewarding.
 

NeoAnarchist

Well-Known Member
i dont understand this formula, break it down, how does flora-micro-grow start at 0-8-16 even work? what is the 0, whats the 8, and whats the 16? wouldnt u just get a deficiency anyways since u arent using one of them?
 

dirt clean

Well-Known Member
I understood the breif look at the lucas formula i took a way around buying the veg. Since you can get the N you need from the micro and flower. I am interested to see how you use so much K. Then again I guess at only 16 you are not going to burn anything. I am testing the N at twice the P in veg and the K at 3/4 the N and in flower the P at teice the str of the N and the K at 3.4 the P. Never over 5 N in flower. I am rambling. This has nothing to do with the lucas formula. Sorry. Just curious on what the NPK levels you guys use is. Then again I am thinking soil mostly. The K in hydro under hids makes sense to be higher. :) I have read the whole LUCAS formula in lots of plaves tho. I am sure a google will help. I have seen him I think still posting ans he got it from somewhere and that guy is still there or nor. Nice story of internet pot history.
 

KP2

Well-Known Member
1-2-3 or 0-8-16 means gro, micro, and bloom of gh or an three part hydroponic nutrients formula (or other house brand, they all have the same npk values).

gro 2-1-6
micro 5-0-1
bloom 0-5-4

by mixing these in different quantities you get different npk values, altering the way the plant grows.

lucas formula is known to work as it does cover the npk range well, and has the micros needed to avoid deficiency if used at 1.5 tsp (8ml) per gallon.

that being said, i like 3 part the way it was designed... with all three parts. lucas formula has never yielded for me like the normal 3 part formula + cal/mag and booster.
 

smppro

Well-Known Member
There isnt a veg formula because Lucas didnt veg long enough to need once. He vegged a couple of weeks with the bloom formula, works just fine.
0-8-16 means
0=GH Grow
8=GH Micro
16=Bloom
no need to by the Grow for lucas formula
 

deezy305

Active Member
can I run other additives such as diamond nectar, sweet nectar, floralicious bloom, koolbloom and etc or will it hurt this formula?
 
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