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Lucas formula
- Thread starter Smokeone1
- Start date
but yes 8 micro 16 bloom.
i always start at 5-10 then adjust as needed, thats 6-12 with alittle lkb
IMEfull strentgh results with tip burn like this if not worse+ the time spent chasing ph and ec around sucks, this is at a 7-14 when tips started burning
6/9 in hydro is a good starting point. i run 3/5 young w/ 3mil calmag.
then 6/9 & 5mil calmag veg an early flower.
then 6/9 & 5mill calmag with 5mil pk 10/11 from day 10-15 till flush.
if you have a less intense environment, you may need to cut back a few mills of each.
man do i love this ratio. ph of 5.8 has been my sweet spot from veg to flower. tried many differnt combos, lower ph an higher ph over 30 + runs. check or adjust ph once a day,5.8 is where it is at my friend........
run a zyme pruduct, run 5 mill silica blast, liquid guano an maxicrop ad love to your plants. mycorhizae an ewc tea bags. I try to mimic soil in hydro
b-safe
The main things to keep in mind with lucas...
You need a 'full' pH swing... from the bottom most comfortable range for your strain/pheno to the upper most comfortable range. 5 days to a week is a good pH swing length to start with... in dwc, nft or any other system where the roots are directly exposed to the nutrient solution at all times.
The more sativa leaning... the more you'll have a tendency not to run full strength at 8/16. Should the strain handle full... it will handle it full as seedlings as well, just as long as you ramp it up over a few days and they're exposed to full strength lighting.
Strength to mix the solution is dependant on strain, lighting strength and quality, humidity, temp and root zone temps.
Top off with non-pH'd water so you don't mess with the natural pH swing.
There's a bunch of stuff on the "ask lucas" thread you can find elsewhere on the net... just search for it. Use the thread tools to choose a printable version and then show 1000 posts per page... makes it easier to read it. LOL
Stay Safe!
You need a 'full' pH swing... from the bottom most comfortable range for your strain/pheno to the upper most comfortable range. 5 days to a week is a good pH swing length to start with... in dwc, nft or any other system where the roots are directly exposed to the nutrient solution at all times.
The more sativa leaning... the more you'll have a tendency not to run full strength at 8/16. Should the strain handle full... it will handle it full as seedlings as well, just as long as you ramp it up over a few days and they're exposed to full strength lighting.
Strength to mix the solution is dependant on strain, lighting strength and quality, humidity, temp and root zone temps.
Top off with non-pH'd water so you don't mess with the natural pH swing.
There's a bunch of stuff on the "ask lucas" thread you can find elsewhere on the net... just search for it. Use the thread tools to choose a printable version and then show 1000 posts per page... makes it easier to read it. LOL
Stay Safe!
The main things to keep in mind with lucas...
You need a 'full' pH swing... from the bottom most comfortable range for your strain/pheno to the upper most comfortable range. 5 days to a week is a good pH swing length to start with... in dwc, nft or any other system where the roots are directly exposed to the nutrient solution at all times.
The more sativa leaning... the more you'll have a tendency not to run full strength at 8/16. Should the strain handle full... it will handle it full as seedlings as well, just as long as you ramp it up over a few days and they're exposed to full strength lighting.
Strength to mix the solution is dependant on strain, lighting strength and quality, humidity, temp and root zone temps.
Top off with non-pH'd water so you don't mess with the natural pH swing.
There's a bunch of stuff on the "ask lucas" thread you can find elsewhere on the net... just search for it. Use the thread tools to choose a printable version and then show 1000 posts per page... makes it easier to read it. LOL
Stay Safe!
Whats up hydrosoil. having a full swing has never worked for me. i always will get some def if i bring far off 5.8. i've tried letting in naturally swing, but my growth always would have issues. phos or cal or mg, maybe 5.6-6.0 tops. i wish i could leave it alone an let it do its thing, i've tried. hummmmmm b-safe an appreciate your info..
What medium are you using?
10 years of dwc and R/O water... nothing changes except a few strains need a couple pinches of epsom salts the first few weeks of flower.
Same in drip through hydroton and other mediums, the only thing that changes is the min-max pH for the given strain/pheno/setup.
Grow mediums go through a pH swing as they dry out... your res will stay between 5.7-6.1, depending. A little variance can be beneficial.
I highly recommend reading that "ask lucas" thread.
Stay Safe!
Lucas did not promote flushing at all. 8/16 to the chop.
For good measure however it wouldnt hurt to give them 3-4 days of straight RO before harvesting.
Though I agree with most of the information Lucas posted... I believe he may have been in the 'non-taster' group.
There's a HUGE difference in quality between stopping the nutes being added 2-3 weeks before harvest (fade) and nutes straight till chop. MASSIVE difference.
If you can't tell the difference, you're not in the group of folks that can tell the difference. That's all.
Your body will thank you for switching to a fade, especially if your intake of cannabis is anything like mine.
Stay Safe!
Just passing along Lucas's teachings.. not really taking either side here as I haven't done enough side by sides to say otherwise.
When growing straight water culture (DWC or EBB Hydroton) I'd typically run straight RO for my final 4-7 days before chop. I've ran nutes up to the chop with no complaints of bad taste/burn, but this was some time ago so I cant say either way..
Even in hydroton or in the absence of medium you still recommend 2-3 week finish with no nutes? That seems like a long time to be running on straight water. I realize the idea is to have the plant use up all of its stored nutes / cannibalizing itself, but where is the fine line between starving the plant for reduced quality/yields and doing what you suggest for a superior finish?
Do you yield less with this long of a flush? I remember head stated that he saw a reduction in yield ~10% (but still worth it in quality/taste) dropping his micro early, but he was also in coco which retains nutes.
Lucas's idea/teachings was that one shouldn't be starving the plant right when it is in "full swell mode"....I do believe he was more production oriented and didnt speak much on quality, etc.. only that healthy plants = quality results.
When growing straight water culture (DWC or EBB Hydroton) I'd typically run straight RO for my final 4-7 days before chop. I've ran nutes up to the chop with no complaints of bad taste/burn, but this was some time ago so I cant say either way..
Even in hydroton or in the absence of medium you still recommend 2-3 week finish with no nutes? That seems like a long time to be running on straight water. I realize the idea is to have the plant use up all of its stored nutes / cannibalizing itself, but where is the fine line between starving the plant for reduced quality/yields and doing what you suggest for a superior finish?
Do you yield less with this long of a flush? I remember head stated that he saw a reduction in yield ~10% (but still worth it in quality/taste) dropping his micro early, but he was also in coco which retains nutes.
Lucas's idea/teachings was that one shouldn't be starving the plant right when it is in "full swell mode"....I do believe he was more production oriented and didnt speak much on quality, etc.. only that healthy plants = quality results.
What type of hydro are you using ? Did you add liquid guano and ewc tea bags in your reservoirs combined with mineral nutrients ? Didn't you had any problems with this organic nutrients in hydro setup ?
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huh? Not so sure about that info.
Lucas promoted mixing a res full strength (8/16) and gradually topping up with straight un-ph adjusted RO water. This in itself gradually raises the pH while diluting the EC. An addback is then made to get back up to full strength 8/16...knocking the pH back down.
You definitely want some drift. Running 8/16 in RO with the initial pH set to around 5.2 works great. Drift it up (via RO top off) to around 6.0-6.2 before knocking it back down with nutes. No pH adjusters typically needed.
Eazy peazy.. you want that pH to move within a range to allow for full absorption of nutrients.
^^
true true
true true
There are a LOT of things people commonly get wrong about Lucas... because there's a lot of misinformation posted by people who don't know.
Read my signature, I've had that quote of his in there for over a year, I think. In his "Ask Lucas" thread he spends a LOT of time covering the pH swing, why it's necessary and how to manage it properly.
HUGE difference in plant growth.
Though... if you're running drip through a 'medium' of some sorts... you actually DO have a pH swing as it dries out between cycles.
Stay Safe!
