berad4guvna
Well-Known Member
Thanks, great chart. 
Guide to Nutrient Deficiency or Toxicity
- Thread starter nick17gar
- Start date
roachfinder
Well-Known Member
ok I need some help. my leaves are turning more and more brown. it started at the bottom and now the top leaves. it looks like a phosphorus and mg. problem now that i see this, but i thought i was over-fertilizing my plants. how can you tell the difference?
roachfinder
Well-Known Member
and maybe (k)? ill have to put some pics on here when the lights come on. Hopefully there are growers on here that will be able to tell what the problem is.
roachfinder
Well-Known Member
roachfinder
Well-Known Member
ok i read if you have wood ash your ph go's up. I just checked my soil ph and it shot past 0. how the hell is that possible?
roachfinder
Well-Known Member
the phosforus, potassium and mg deficancy are my problem, but it looks exactly like a burn. how can you tell the difference if they look the same? i tried flushing just now and one of them had whit foam or something at the top of the water. any ideas and/or help?????
roachfinder
Well-Known Member
ok so i know for a fact they are root bound. they are barley gallon size pots. my nutrients is awsome...advanced nutrients: sensi bloom, bud candy and some carbo load. its well into the 6th week of flowering. actually just started its 7th week. i have 3 23w cfls and 3 19w cfl's, 2 2' florecent tubes and one 4' florecent tube. the humidity is about 50. sometimes gets to 70. the temp is about 80-82. but the weridest thing of all, is i have have a device that reads ph and fertility.....it has prongs so i had to carefully put it down the side so i wouldnt rip the roots, and it worked except the ph shot past 0. ppl said its broke, so i tried it on my house plants and the aloe plant had a ph of 7.5.....so i know it works..how the hell is that possible though???
roachfinder
Well-Known Member
oh yea....my tall plant is still not growing bud. it keeps growing pistols and stems. thats it. I lollipopped both my plants and i super-cropped the tall one. but no bud. the tall one only has curled tips and one leave has a white tip. the other plant, which you seen its leaves...is growing bud.
doogleef
Well-Known Member
Wow. Not sure where to start....First, it sounds like you spent more on your nutrients than you did you actual setup. I recommend a real light and a fan to maintain circulation and exhaust. CFLs can grow buds for some people on some strains. Most of the time it is an epic failure. CFLs are ok for veg time. Bloom needs real light. PH issues in soil are really rare. Soil contains buffers that generally return it to about 7. That said, 1 gallon is not much so you could have dropped yer PH down with your nutes. Is that sensiBloom got the "PH Perfect" stuff that AN is pimping now?
So she is about two months old i think, overall she looks healthy to me. I'm a newbie for sure. Temps are hovering around 75F lights on and around 68 to 70F during lights off. Relative humidity fluctuates but is usually really low anywhere from 15% to 40% usually around 20% + or - 5%. I have been using the house brand from my local hydro store for nutes, (David's). I have been using them at half strength w/ tap water ph adjusted to 6.0. Ph of the rockwool cube is around 6.8. I know that I need to lower the overall ph and also to use some filtered water, I'm working on it. I do not have a ppm meter unfortunately so I'm not sure how full of crap the tap water im using is. I think this is a Magnesium Deficiency from looking at the pics but I'm not sure and I need advice please.For some reason i can't add pics. will try again later.
Total Nitrogen (N) 2.8% , Calcium (Ca) 3.8% , Sulfur (S) 1.2% for the grow solution. Total Nitrogen (N) 1.6%, Available Phosphate (P2O5) 1.8%, Soluble Potash (K2O) 7.4%, Total Magnesium (Mg) 2.4%, Manganese (Mn) 0.017%, Iron (Fe) 0.1%, Boron (B) 0.016%, Zinc (Zn) 0.005%, Molybdenum (Mo) 0.004%, Sodium (Na) 0.64%, Sulfur (S) 0.64% for the base solution. Hope that helps.
piecemasta
Active Member
I have had the same reoccurring deficiency for the past several grows during both veg and flower phases.
After reviewing several posts including the Guide to Nutrient Deficiency and Toxicity thread I believe it to be both a potassium and magnesium deficiency.
I was hoping to hear from some growers who have more experienced then it when it comes to this aspect.
I will measure runoff ph and ppm as soon as I get a chance.
Specs:
-indoor
-Strain: DJ Short's BlueBerry (first 4 pics) and a True OG (final 5th pic)
-pro-mix hp (premix 10gals of promix w/ 2 tblsp of dolomite lime and ironite from Home Depot)
-feed using RO water
-pictures are of 4 week old plants vegging
-soil drenched once every third or fourth day depending on each plants water uptake
-nutrients every other watering at half strength using Pure blend Pro grow, silica blast, & liquid karma
After reviewing several posts including the Guide to Nutrient Deficiency and Toxicity thread I believe it to be both a potassium and magnesium deficiency.
I was hoping to hear from some growers who have more experienced then it when it comes to this aspect.
I will measure runoff ph and ppm as soon as I get a chance.
Specs:
-indoor
-Strain: DJ Short's BlueBerry (first 4 pics) and a True OG (final 5th pic)
-pro-mix hp (premix 10gals of promix w/ 2 tblsp of dolomite lime and ironite from Home Depot)
-feed using RO water
-pictures are of 4 week old plants vegging
-soil drenched once every third or fourth day depending on each plants water uptake
-nutrients every other watering at half strength using Pure blend Pro grow, silica blast, & liquid karma
doogleef
Well-Known Member
Add some Cal/Mag and maybe bump up from 1/2 strength on the PBP. It's pretty mild stuff compared to some of the other stuff on the market.
If you are folding in Lime anyway (great PH control) then I would just fold in some other stuff and make it a water only deal. Ditch the bottled nutes all together. But that's just me... lazy old stoner
So this is the pic I was going to post the other day of what I beleived to be a magnesium def. I am still unsure and would like your opinion please. I started watering with full strength nutes a few days ago but I haven't had much time to inspect her recently. Will look again today to see if she has improved. Thanks again for your input.
