Issues with lucas formula in soil with LEDS. feedback much appreciated

CBDseeker

Active Member
I have been growing for a couple years now but I still feel like newbie as I havent dialed in my set up

I have 3 tents in different phases of growth all the time and harvest every month and a half or so.
The problem is that all my recent grows have been less than ideal. I wanted to use lucas formula because its supposed to be fine to use same water for both veg and flower.

Every time I put the plants in flower they seem to show what seems to be either a nutrient difficiency or burn. I'll attach some pics.

When I started growing I was using coco but within last year I changed to soil(promix)

I have 2 reservoirs I use for watering.

One with lucas formula, cal mag, and small amount of uc roots phd
other one with just calmag and small amount of uc roots phd

Lights are 12 bridgelux strip fixtures that I made.
tents are 5x5 and I do 4 plants per tent.
I maintain around 72 degrees and 50% humidity for all tents
Try to maintain light atleast 12" from plants but usually closer to 18 or 20"
try to keep lux reading at canopy around 40-50k

current grow is Purple ayuhuasca by barneys farm but I've been seeming to have the same issues regardless of strain

I'm not sure If I should be using the water with food everytime, or the plain cal mag water every other watering.
I'm not sure if I should be watering to the point of runoff like I was supposed to with coco
I'm not sure if it's the light being to strong.

My feeling is that there is a nitrogen deficiency, but could be lights being a bit too strong on em.

Any and all help and feedback is greatly appreciated as I really want to start pulling good healthy harvests.

Pics are different stages of growth from last harvest.
 

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BobThe420Builder

Well-Known Member
Let me try again

Which Promix, there are like 3 different ones, one has nutes in it

I use Promix HP, white and silver bag


Have u always had the issues? I use the GH flora trio and never an issue at all but I adjust for each stage if growth

To me, always using the same ratio start to finish dosent fit in my brain very well
 

CBDseeker

Active Member
I'm using Promix HP as well.

Here are some more pics I took last night of the current ones I put in flower about 3 weeks ago.

I feel like I started having the issues when I went to soil. also when I checked temp last night it was 68 degrees which I feel like is on the lower side so I upped that a bit.
 

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BobThe420Builder

Well-Known Member
Promix is NOT soil, it's considered soil less medium, it's Peat based

I generally water/feed about every 3rd day with GH flora trio, every other in flower

I feed every watering


68 at lights off is fine, 70-80 lights on
 

CBDseeker

Active Member
ya I'm thinking I gotta add some flora gro to what I'm doing. saw in another thread someone mentioned that instead of just the 8/16 of micro and bloom he changed to 5/8/16 (adding gro) and saw good results.
 

CBDseeker

Active Member
also are you saying in flower you feed with trio one watering then just calmag next and so on? and thanks for the heads up about it being peat. dunno how I didn't know this. Like I said I feel like and still am a complete newb lol
 
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