Mojave Joe
Lost in a Blue Haze
Lucas Formula - A Hydro/Soil/Coco Feeding Strategy
Caveat: This page is WORK IN PROGRESS
Summary:
Lucas Formula, sometimes known as the Lucas Ratio, is less complicated than it initially seems. It is nothing more than a basic recipe of nutrients to give your plants during both the vegetative, and the flowering state.
The original recipe uses 2 parts of the General Hydroponics 3-part FLORA series (Gro, Micro, Bloom) nutrient system, but Lucas Formula may also be used with Advanced Nutrients, GH's dry nutes (Maxibloom), etc.
1. Lucas Formula using General Hydroponics Dry Nutrients (Maxibloom)
MaxiBloom and MaxiGro are dry nutrient also from General Hydroponics. It turns out, Maxibloom, used in a ratio of 7 grams per gallon of water*, is very close to the original Lucas Formula (above.) You do not need MaxiGro, and so this is the cheapest and easiest recipe to use.
Add 7 grams of Maxibloom into 1 gallon of water*, and then adjust the pH, and stir vigorously to dissolve the Maxibloom in the water. I advise putting the 7g of Maxibloom into a cup of warm water, dissolving it, and then adding it to the remaining gallon of water, before pH adjusting and mixing again.
2.Lucas Formula using General Hydroponics 3-Part System
General Hydroponics makes a 3-part system named the FLORA series. It consists of FLORA GRO, FLORA MICRO, and FLORA BLOOM. These are 3 bottles you buy, that you would normally use together throughout the entire grow. You may use it as per the instructions on the bottle, with excellent results, but...
Lucas figured out that FLORA MICRO contains enough nitrogen, and everything else that MICRO GRO contains, that you use it with FLORA BLOOM alone, saving you from having to buy FLORA GRO.
How do you use it? Simple. Add 8ml of Flora Micro (dark red stuff) to 1 gallon of water*, mix, and then add 16ml of Flora Bloom (pink stuff) into the water, and mix. Done - unless you're growing in coco.
3. Lucas Formula using General Hydroponics FloraNova series
This is probably the easiest (but not cheapest - see MaxiBloom above) feeding plan available. If you're using General Hydroponics' FloraNova Bloom 1-part system, simply add 8ml of FloraNova per gallon of water* and feed.
4. Lucas Formula when growing in Coco Coir - Head's Formula
If you're growing in coco, you may need to adjust the Lucas formula slightly to compensate for a property of coco which may result in a calcium or magnesium deficiency. How? You may be able to get by simply by adding 1-2ml of calmag (or MagiCal+), or 1 gram of Epsom salt (any pharmacy carries this), per gallon of water, before feeding the plants.
There is a modified formula specifically for Coco that consists of using a different ratio: 6ml of Flora Micro, and 9ml of Flora Bloom, per gallon of water, along with 1 gram of Epsom salt per water.
Either works, but be sure to try Head's Formula if you're having deficiencies or other nute/pH problems.
5. After watching and reading and generally being impressed with the results you've all been getting with the coco medium, I've had to make the switch myself...
Being the rebel that I am...Not having coco specific nutes, and having a full supply of GH flora micro and bloom, I've been working at tailoring the 'Modified Lucas formula' I was using in pro-mix to suit the coco better...
The mix I have arrived at has reduced levels of K and P, and a slight reduction in total concentration, because I have been keeping the runoff to a minimum (only a few ounces of water come thru, just enough to let me know I'm completely saturated...
So... when I was using a modified lucas formula... my nutrient profile when growing in promix was:
N 130
P 93
K 163
Mg 64
S 43
Ca 130
By mixing 8ml/gal micro and 14ml/gal bloom and watering with plain water every other watering...
6. Low light ratio, and flowering vs veg
Lucas Formula should be used in the same ratio throughout the grow. There is a misconception that one should use 5ml of Micro and 10ml of Bloom, when in veg, and switch to 8ml of Micro, and 16ml of Bloom, when flowering.
This was never stated by Lucas himself. He originally stated that the 0-5-10 ratio was for LOW LIGHT situations (fluorescent lighting like PL/L and CFLs, or HID lamps less than 400W), whereas 0-8-16 is for medium to high light (400W+)
7. * What type of water should I use? What about pH/ppm?
The original formula uses reverse osmosis, or RO, water, and is intended to be used without having to measure pH and ppm. Reverse Osmosis water makes this possible because it should, in theory, be the same for everyone. It is filtered water, which you can get either by buying a reverse osmosis filter system, or just buying bottled water (among other brands, Dasani, the bottled tap water is reverse osmosis, for example). One may also use dH2O (distilled water) with good results. You can get distilled water from most convenience stores (Walgreens, CSV, Rite-Aide, etc..)
8. Lucas Formula for seedlings/cuttings
For young plants (< 4 weeks old) or cuttings, which may not be able to handle a full strength feeding formula, may require that you dilute the nutrient solution before feeding. This is OK, just make sure you keep the correct ratio when mixing. For example, 50% strength would be 4ml Micro and 8ml Bloom, or 3.5g of dry Maxibloom per gallon.
Lucas Formula with tap water
You may use Lucas Formula with tap water successfully, but this may require pH adjusting on your part. Keep the pH close to 5.8.
Can I use additives with Lucas Formula?
You may. It is recommended that you do not introduce additives until your setup is dialed in. After you've ironed out any deficiencies and fully understand how your plant and strain likes to be fed, feel free to begin using additives (such as Floralicious) - not that the additives will help. For increased quality and yield, focus on good genetics, and ample light and temperature control, rather than trying to compensate for those with additives.
In the coco, I am now using 6ml/gal micro and 9ml/gal bloom which gives the nute profile:
N 97
P 60
K 105
Mg 41
S 27
Ca 97
adding 1 g/gal epsom salts to the solution changes the numbers for mg and s to:
Mg 67
S 61
Adjusting for the extra available potassium in the coco, the new formula puts me very close to the 'target ratio'... Phosphorous is a tad low, but I think there should be no worries there...
Nothing is too far along in flower right now, but I'll get some pics up a bit later.
I have also seen advantage in keeping the coco fairly wet, I'm guessing that the coco holds the nutes so well, that as moisture evaporates out, concentrations rise...
(I have copied and pasted this information from several different sources for the benefit of Our Community, so nothing is original from My Own creation. I just felt it necessary to present the different variables so that there would be no confusion as to the different methods One could employ.)
I have been personally using Lucas Formula on and off for 6 + years or so with great results. I got tired of spending tons of $$$ on additives and what not in hopes of getting the most bang for My Bucks and when all was said and done, the Lucas Formula had won out for Me using the Hempy Bucket method of growing.
My aim in creating this page of information is/was to demystify the different ways in which this formula could be done and I am sure there are other ways in which to do it as well. I am a Rebel at Heart, always going against the "System" with the belief that there is always a better way to get the same things done without spending stupid amounts of money on things which ultimately and not necessary to be used to accomplish the same thing, right?
Good luck to those of You Who walk the same path as I!
Caveat: This page is WORK IN PROGRESS
Summary:
Lucas Formula, sometimes known as the Lucas Ratio, is less complicated than it initially seems. It is nothing more than a basic recipe of nutrients to give your plants during both the vegetative, and the flowering state.
The original recipe uses 2 parts of the General Hydroponics 3-part FLORA series (Gro, Micro, Bloom) nutrient system, but Lucas Formula may also be used with Advanced Nutrients, GH's dry nutes (Maxibloom), etc.
1. Lucas Formula using General Hydroponics Dry Nutrients (Maxibloom)
MaxiBloom and MaxiGro are dry nutrient also from General Hydroponics. It turns out, Maxibloom, used in a ratio of 7 grams per gallon of water*, is very close to the original Lucas Formula (above.) You do not need MaxiGro, and so this is the cheapest and easiest recipe to use.
Add 7 grams of Maxibloom into 1 gallon of water*, and then adjust the pH, and stir vigorously to dissolve the Maxibloom in the water. I advise putting the 7g of Maxibloom into a cup of warm water, dissolving it, and then adding it to the remaining gallon of water, before pH adjusting and mixing again.
2.Lucas Formula using General Hydroponics 3-Part System
General Hydroponics makes a 3-part system named the FLORA series. It consists of FLORA GRO, FLORA MICRO, and FLORA BLOOM. These are 3 bottles you buy, that you would normally use together throughout the entire grow. You may use it as per the instructions on the bottle, with excellent results, but...
Lucas figured out that FLORA MICRO contains enough nitrogen, and everything else that MICRO GRO contains, that you use it with FLORA BLOOM alone, saving you from having to buy FLORA GRO.
How do you use it? Simple. Add 8ml of Flora Micro (dark red stuff) to 1 gallon of water*, mix, and then add 16ml of Flora Bloom (pink stuff) into the water, and mix. Done - unless you're growing in coco.
3. Lucas Formula using General Hydroponics FloraNova series
This is probably the easiest (but not cheapest - see MaxiBloom above) feeding plan available. If you're using General Hydroponics' FloraNova Bloom 1-part system, simply add 8ml of FloraNova per gallon of water* and feed.
4. Lucas Formula when growing in Coco Coir - Head's Formula
If you're growing in coco, you may need to adjust the Lucas formula slightly to compensate for a property of coco which may result in a calcium or magnesium deficiency. How? You may be able to get by simply by adding 1-2ml of calmag (or MagiCal+), or 1 gram of Epsom salt (any pharmacy carries this), per gallon of water, before feeding the plants.
There is a modified formula specifically for Coco that consists of using a different ratio: 6ml of Flora Micro, and 9ml of Flora Bloom, per gallon of water, along with 1 gram of Epsom salt per water.
Either works, but be sure to try Head's Formula if you're having deficiencies or other nute/pH problems.
5. After watching and reading and generally being impressed with the results you've all been getting with the coco medium, I've had to make the switch myself...
Being the rebel that I am...Not having coco specific nutes, and having a full supply of GH flora micro and bloom, I've been working at tailoring the 'Modified Lucas formula' I was using in pro-mix to suit the coco better...
The mix I have arrived at has reduced levels of K and P, and a slight reduction in total concentration, because I have been keeping the runoff to a minimum (only a few ounces of water come thru, just enough to let me know I'm completely saturated...
So... when I was using a modified lucas formula... my nutrient profile when growing in promix was:
N 130
P 93
K 163
Mg 64
S 43
Ca 130
By mixing 8ml/gal micro and 14ml/gal bloom and watering with plain water every other watering...
6. Low light ratio, and flowering vs veg
Lucas Formula should be used in the same ratio throughout the grow. There is a misconception that one should use 5ml of Micro and 10ml of Bloom, when in veg, and switch to 8ml of Micro, and 16ml of Bloom, when flowering.
This was never stated by Lucas himself. He originally stated that the 0-5-10 ratio was for LOW LIGHT situations (fluorescent lighting like PL/L and CFLs, or HID lamps less than 400W), whereas 0-8-16 is for medium to high light (400W+)
7. * What type of water should I use? What about pH/ppm?
The original formula uses reverse osmosis, or RO, water, and is intended to be used without having to measure pH and ppm. Reverse Osmosis water makes this possible because it should, in theory, be the same for everyone. It is filtered water, which you can get either by buying a reverse osmosis filter system, or just buying bottled water (among other brands, Dasani, the bottled tap water is reverse osmosis, for example). One may also use dH2O (distilled water) with good results. You can get distilled water from most convenience stores (Walgreens, CSV, Rite-Aide, etc..)
8. Lucas Formula for seedlings/cuttings
For young plants (< 4 weeks old) or cuttings, which may not be able to handle a full strength feeding formula, may require that you dilute the nutrient solution before feeding. This is OK, just make sure you keep the correct ratio when mixing. For example, 50% strength would be 4ml Micro and 8ml Bloom, or 3.5g of dry Maxibloom per gallon.
Lucas Formula with tap water
You may use Lucas Formula with tap water successfully, but this may require pH adjusting on your part. Keep the pH close to 5.8.
Can I use additives with Lucas Formula?
You may. It is recommended that you do not introduce additives until your setup is dialed in. After you've ironed out any deficiencies and fully understand how your plant and strain likes to be fed, feel free to begin using additives (such as Floralicious) - not that the additives will help. For increased quality and yield, focus on good genetics, and ample light and temperature control, rather than trying to compensate for those with additives.
In the coco, I am now using 6ml/gal micro and 9ml/gal bloom which gives the nute profile:
N 97
P 60
K 105
Mg 41
S 27
Ca 97
adding 1 g/gal epsom salts to the solution changes the numbers for mg and s to:
Mg 67
S 61
Adjusting for the extra available potassium in the coco, the new formula puts me very close to the 'target ratio'... Phosphorous is a tad low, but I think there should be no worries there...
Nothing is too far along in flower right now, but I'll get some pics up a bit later.
I have also seen advantage in keeping the coco fairly wet, I'm guessing that the coco holds the nutes so well, that as moisture evaporates out, concentrations rise...
(I have copied and pasted this information from several different sources for the benefit of Our Community, so nothing is original from My Own creation. I just felt it necessary to present the different variables so that there would be no confusion as to the different methods One could employ.)
I have been personally using Lucas Formula on and off for 6 + years or so with great results. I got tired of spending tons of $$$ on additives and what not in hopes of getting the most bang for My Bucks and when all was said and done, the Lucas Formula had won out for Me using the Hempy Bucket method of growing.
My aim in creating this page of information is/was to demystify the different ways in which this formula could be done and I am sure there are other ways in which to do it as well. I am a Rebel at Heart, always going against the "System" with the belief that there is always a better way to get the same things done without spending stupid amounts of money on things which ultimately and not necessary to be used to accomplish the same thing, right?
Good luck to those of You Who walk the same path as I!
