Cal or Mag problem

Soul Dwella

Well-Known Member
Hey gardeners. I'm on my 2nd grow. First photo I've grown. End of week 5 of flower. Bubba Kush. 3 gal fabric pot in 2x2 tent with 600w full spectrum LED at 14in. Runoff Ph is consistent at 6.2-6.1 I water every 4 days alternating between 1 gal of water with 1 tbs molasses and 1 gal of water with 6ml DynaGro Bloom, both feedings PH'd to 6.4-6.3. I'm using tap water and do not currently have an EC meter. I believe I'm noticing a Cal or Mag (or both) deficiency. The plants also seem to have a very small amount of burnt tip, maybe nute burn? I didn't think burn was possible at the levels of nutes I'm using so I'm leaning towards no nute burn or lockout and just a straight up deficiency of Cal and/or Mag. What do you guys think?
 

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Soul Dwella

Well-Known Member
Wow, quick response. Thanks! These are in soil, FF HappyFrog. I agree, they are pale-ish. I'm confused if nutes are locked out or straight deficient. Some of the tips appear to be slightly burnt, which is confusing me. And to think, I thought I was a grow god because on my first grow, my auto grew flawlessly. LOL
 

osowhom

Well-Known Member
Wow, quick response. Thanks! These are in soil, FF HappyFrog. I agree, they are pale-ish. I'm confused if nutes are locked out or straight deficient. Some of the tips appear to be slightly burnt, which is confusing me. And to think, I thought I was a grow god because on my first grow, my auto grew flawlessly. LOL
i am in week 4 with the same medium i give them full strength tiger bloom 3 times a week and molasses one and they are happy and green no issues
 

Trickyticky

Well-Known Member
Wow, quick response. Thanks! These are in soil, FF HappyFrog. I agree, they are pale-ish. I'm confused if nutes are locked out or straight deficient. Some of the tips appear to be slightly burnt, which is confusing me. And to think, I thought I was a grow god because on my first grow, my auto grew flawlessly. LOL
If ya using happy frog I'm sure it is ph buffered . I hope I'm right on that as I've never used it being from uk , but I'm sure it has . You should invest in decent EC pen . Then you know ya strength of what's going in
 

Soul Dwella

Well-Known Member
Very possible that they are hungry. With my schedule, they are only getting 60% of the recommended dose, every 8 days. You water 4 times per week? What size pots? Do you water to runoff each time?
 

Trickyticky

Well-Known Member
It's not too much light . Look through his/her pics . It's lacking food all over and it's that hungry it's spread throughout the whole of his/her plant
 

19-Sean-86

Well-Known Member
It's not too much light . Look through his/her pics . It's lacking food all over and it's that hungry it's spread throughout the whole of his/her plant
Agree with this as I can see cal-mag deficiency nitrogen deficiency potassium deficiency and phosphorus deficiency :P
 

Soul Dwella

Well-Known Member
Thanks for the help Tricky and all! Underfed makes perfect since. Info I left out is that a 3rd plant in the tent, same strain as the others, but is 3 weeks younger looks perfectly healthy. All the plants have been giving the exact same amount and dose of water and nutes. The smaller/younger plant is not yet using the amount of nutes of her older sisters, so she's fine. If it was burn/lockout, I assume it would have affected the younger/smaller plant first. I have ordered a EC meter and will put that to use. Also I will maintain 60% percent of manufacturers recommended dose but instead of alternating nute water and molasses water. I'll go 2 nute feedings then 1 molasses water. How does that sound? More pics attached with cam flash only and LED off this time and 1 with no flash. Thanks again all. Much appreciated!
 

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Trickyticky

Well-Known Member
Next time read what's on the back of the bag . Find out what's in it . Find out if ph buffers added ( should be ) . Find out the ec . Yeh sounds good what ya going to do .
 

Soul Dwella

Well-Known Member
So now I'm thoroughly confused on EC of runoff. My tap water's PPM is 155. The PPM of one gallon of my nute water with 7ml GH bloom (%70 percent of recommended dose) is 477. The PPM of my runoff is 829. I guess this means a salt build up?? Wouldn't the PPM's be higher after draining through dirt no matter what? The dirt itself will be dissolved in the run off, right?? I cant comprehend that its possible to have a runoff with less PPM's than the input solution after draining through dirt. This might be a topic for a separate thread, but just know, I'm utterly confused now. LOL
 

Mcwhippin420

Well-Known Member
So now I'm thoroughly confused on EC of runoff. My tap water's PPM is 155. The PPM of one gallon of my nute water with 7ml GH bloom (%70 percent of recommended dose) is 477. The PPM of my runoff is 829. I guess this means a salt build up?? Wouldn't the PPM's be higher after draining through dirt no matter what? The dirt itself will be dissolved in the run off, right?? I cant comprehend that its possible to have a runoff with less PPM's than the input solution after draining through dirt. This might be a topic for a separate thread, but just know, I'm utterly confused now. LOL
Yeah thats crazy a whole hell of alot higher id like to know main causes as well.
 

Soul Dwella

Well-Known Member
soil run off is a pointless endeavor , your going to go down a rabbit hole.
I think I agree. I dont see how soil runoff could ever have lower PPM's, under any condition. Not even trying to diagnose my issue anymore, just trying to understand how the runoff could ever be lower.
 
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