Guide to Nutrient Deficiency or Toxicity

Originally Posted by Noximus

Hey, can you help me narrow down this issue. I believed at first it was nute burn, but now i believe that it is a P or K defeciency. It starts on the youngest leves while the older growth seems unaffected. I am.using roots organic soil nutes are Subcools super soil.mix. two 600w hps cooled with a 465cfm fan. Average temps 75-80°. Plants still.grow pretty buds but at slower rate and with less yield since the fan leaves endup dead. Sugar leavez around buds are affected after top fan leaves die out. With old growth affected last??? leaves start like thisAttachment 2228911 then start curling at the tips like thisAttachment 2228912 then keep getting worse Attachment 2228913Attachment 2228914Attachment 2228915

honestly, pic 1 looks fine, the other 4 look like heat issues. my digital thermometer (39 bucks) tells me the peaks of the temp, are you sure they arent passing 80 degrees? another possibility might be humidity, as long as thats close to 50%, and heats not over 80, then id add some micro nutes, just to see if it helps.

and yea add more P and K anyways for the discoloration

Originally Posted by Jopse

Need help bottom first set of true leaves r yellowing its 1 month and 5 days old since planted in soil after root has emerged from seed. Any tips for this first timer. This is hard!

have you tried nutrients? like adding nitrogen? pics help too.

Originally Posted by nick17gar

honestly, pic 1 looks fine, the other 4 look like heat issues. my digital thermometer (39 bucks) tells me the peaks of the temp, are you sure they arent passing 80 degrees? another possibility might be humidity, as long as thats close to 50%, and heats not over 80, then id add some micro nutes, just to see if it helps.

and yea add more P and K anyways for the discoloration

thanks but my temps and humidity are ok. my other plants weren't experiencing the problems that this one was. i fed with some light flowering nutes and it got even worse. so i believe it was what i believed at first, nute burn. its ok, i have cuttings of it ready to go for the next run. this must be a nutrient sensitive strain. its a chocolope x white widow that i created. and ooooh it smells like a fruity, floral juice. covered in resin by week 2 flowering. cant wait to taste it. but thanks for the response

Im posting this from another thread, I think its key on how to Create your own feeding plan, and start PREVENTING issues, instead of TREATING them.

Originally Posted by nick17gar

i gotta be honest, and im guilty of this too, trying to find out exactly what nutes are showing their deficiencies, kinda pointless.
its not like we can easily add one nute and not any other. like if your short potassium or calcium for example, maybe ya can, but if your short on molybdenum or copper what do ya do?

after many grows im starting to think we should start looking at plant problems the say way we look at ourselves when treating injuries or wierd bumps or a rash or whatever. we dont try to find out exactly what strain of bacteria is growing on our finger, we simply apply neosporin (or some other ointment) and if it doesnt work after a week, then we seek professional help.

So, what to do? the first thing i do now, when treating a large number of plants, that have a variety of deficiencies at once (but none have overferting), is make a ´cure all´. After checking the pH and knowing they CAN absorb nutes, you mix up your nutrient solution like you did last time, and add in more of what your guessing your low on. really, its the big 3, or the micro nutes, (or sugars if in flower). either way, if you have a good variety of nutes (and therefore elements used as ingredients in the nutrients), then youll probably cure the plant of the deficiency. over time, youll get a hang of it, and by adjusting the nutrients on your own, every watering, youll come up with a ratio that works well for your grow, your plants, and your nutrient purchases.

When can I buy all these nutrients. Because every picture with the problems looks like my plant. The leave are drying out and it won't grow it's only 2 weeks old

• When can I buy all these nutrients. Because every picture with the problems looks like my plant. The leave are drying out and it won't grow it's only 2 weeks old

  
  

Originally Posted by xxvsrxx

When can I buy all these nutrients. Because every picture with the problems looks like my plant. The leave are drying out and it won't grow it's only 2 weeks old

um.... now?

at 2 weeks, im already feeding nutes. either by adding them in when i water, or by providing good (nutrient rich) dirt.

What are you growing in? got pics? whats your ph? temps? lights? no nutrients yet? please god tell me your in dirt, cuz no nutrients in hydro is NOT good.

Hey I'm gettin a lil worried about my larger plant here its about 23 days into flowering and a lot of the fan leaves r yellowing and dying, I'm growin in FFOF soil was usin grow big and big bloom, also tryin out that banana tea w/molasses. I don't have ph meter but I got a water report that said the ph average for this area was 7-8, temps don't usually get too hot since I have my lights come on around sunset. I've added dolomite lime to my soil b4 the grow and a lil as a top dressing, could my soil b too alkaline? But the rest of the plant is lookin good. Its just almost every day more fan leaves r yellowing and dying.

dvs1038-298829-albums-new-grow-picture2255055-worried-about-losing-so-many.jpgdvs1038-298829-albums-new-grow-picture2251744-2012-07-11-21-35.jpg