severe yellowing of leafs

fawohodie · #1 (**permalink**) 07-20-2009, 03:08 PM

this last week my bigger plants are having this problem of leafs yellowing, first started from the bigger leafs at the bottom & now its progressing rapidly to others. I'm fertilising twice a week at 1/4 strength. i'll take some pics at sunset

Ginger Bud · #2 (**permalink**) 07-20-2009, 03:18 PM

the only we can help diagnose your problem is with pics, sounds like nitrogen def, 1/4 strength???? how small are they, i blast full strength after 4 weeks, get those pics, and we will see if we can find that magic wand

ironlung253 · #3 (**permalink**) 07-20-2009, 05:07 PM

If it does come down to a nute deficieny problem DO NOT start giving your plants full strength nutes. Strains react differently to nutes. Some strains will take full strength. With another strain you could put your plant into nute lockout, which is a lot bigger problem. Switch to half strength at first, adding GRADUALLY til you find a good concentrate.

fawohodie · #4 (**permalink**) 07-20-2009, 06:39 PM

im 100% positive it is nitrogen deficiency. they are about 2 1/2 months old, i'm giving 1/4 strength because they just got through nutrient lockout. it happened when i switched to full strength & the only conclusion i got is that it happened because the fert contains a good percentage of ammonium nitrogen that when used in great ammount it can block the plant from absorbing nutes.

today im supposed to fertilize, so do you think i should switch to 1/2 strength?? and if so do i still have to fertilized twice a week or go down to once a week

ironlung253 · #5 (**permalink**) 07-20-2009, 08:30 PM

Quote:

Originally Posted by fawohodie

im 100% positive it is nitrogen deficiency. they are about 2 1/2 months old, i'm giving 1/4 strength because they just got through nutrient lockout. it happened when i switched to full strength & the only conclusion i got is that it happened because the fert contains a good percentage of ammonium nitrogen that when used in great ammount it can block the plant from absorbing nutes.

today im supposed to fertilize, so do you think i should switch to 1/2 strength?? and if so do i still have to fertilized twice a week or go down to once a week

You could stay at quarter strength and just increase the number of feedings as opposed to raising nutrient levels. There is a much smaller chance of lockout.

DirtyViperMan · #6 (**permalink**) 07-20-2009, 08:42 PM

You have a calcium def. Not nitrogen. They are turning white not yellow, still green in the veins. You also have nutrient burn on the over leaves. Crisp ends and browning spots. Or its K def. but i dont think so. What kind of lights do you have them under?
Keep'em burnin
DirtyViperMan

fawohodie · #7 (**permalink**) 07-20-2009, 09:18 PM

Quote:

Originally Posted by DirtyViperMan

You have a calcium def. Not nitrogen. They are turning white not yellow, still green in the veins. You also have nutrient burn on the over leaves. Crisp ends and browning spots. Or its K def. but i dont think so. What kind of lights do you have them under?
Keep'em burnin
DirtyViperMan

the burned tips got from a k deficieny because of nute lockout but now its gone after i flushed it last week.
its outdoor so natural light
how can i fix a calcium deficiency? i am collecting eggshells for next year soil mix since they contain calcium, can i use it to make some sort of fertilizer?

DirtyViperMan · #8 (**permalink**) 07-20-2009, 09:47 PM

Garden lime or finely crushed egg shells.
keep'em burnin
DirtyViperMan

igorskee · #9 (**permalink**) 07-21-2009, 03:53 PM

look under the leaves, you might find spider mites. That is a sign, they start eating the bottom leaves first, then they go up... They can only be found under the leaf, never on top. I had same problem, and spider mites were the cause. Might not be in your case, but LOOK UNDER.

I found hundreds of eggs and mites... Even all looked superb in first 3 weeks...

fawohodie · #10 (**permalink**) 07-21-2009, 04:51 PM

i checked under the laefs and no sign of spider mites or other type of insect.
i have a bottle which is supposed to have lots of vitamins, micro nutes & trace elements, will try it with the next watering and see if something will change

Plagron Phyt-amin

anyone ever used it and what do you think?

fawohodie · #11 (**permalink**) 07-21-2009, 05:24 PM

and is it true that epsom salt contains also calcium except magnesium??

sativasam · #12 (**permalink**) 07-23-2009, 02:10 PM

Quote:

Originally Posted by fawohodie

and is it true that epsom salt contains also calcium except magnesium??

Wouldnt know about the Epsom salts, would stick with the plagron stuff you got if it has the trace elements in it, should do the trick and quickly if it is a liquid.

Sick plants guide: The Complete guide to Sick Plants,pH, and Pest troubles! - International Cannagraphic Magazine Forums courtesy of icmag.

Keep it green.

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#1 (permalink) 07-20-2009, 03:08 PM
fawohodie Registered User Join Date: Jan 2009 Posts: 374	severe yellowing of leafs this last week my bigger plants are having this problem of leafs yellowing, first started from the bigger leafs at the bottom & now its progressing rapidly to others. I'm fertilising twice a week at 1/4 strength. i'll take some pics at sunset __________________ This is the garden's magic, That through the sunny hours The gardener who tends it, Himself outgrows his flowers. Last edited by fawohodie; 07-20-2009 at 03:16 PM.

#2 (permalink) 07-20-2009, 03:18 PM
Ginger Bud Banned Join Date: Oct 2008 Location: 27FT Above sea level Posts: 1,811	Re: severe yellowing of leafs the only we can help diagnose your problem is with pics, sounds like nitrogen def, 1/4 strength???? how small are they, i blast full strength after 4 weeks, get those pics, and we will see if we can find that magic wand

#3 (permalink) 07-20-2009, 05:07 PM
ironlung253 "Heavy as Lead" Join Date: Jul 2009 Location: who wants to know? Posts: 1,073	Re: severe yellowing of leafs If it does come down to a nute deficieny problem DO NOT start giving your plants full strength nutes. Strains react differently to nutes. Some strains will take full strength. With another strain you could put your plant into nute lockout, which is a lot bigger problem. Switch to half strength at first, adding GRADUALLY til you find a good concentrate.

#6 (permalink) 07-20-2009, 08:42 PM
DirtyViperMan Registered User Join Date: Mar 2009 Location: CALI Posts: 622	Re: severe yellowing of leafs You have a calcium def. Not nitrogen. They are turning white not yellow, still green in the veins. You also have nutrient burn on the over leaves. Crisp ends and browning spots. Or its K def. but i dont think so. What kind of lights do you have them under? Keep'em burnin DirtyViperMan __________________ Nothing Exceeds like excess. Karma's a bitch spread it when they deserve it.

#8 (permalink) 07-20-2009, 09:47 PM
DirtyViperMan Registered User Join Date: Mar 2009 Location: CALI Posts: 622	Re: severe yellowing of leafs Garden lime or finely crushed egg shells. keep'em burnin DirtyViperMan __________________ Nothing Exceeds like excess. Karma's a bitch spread it when they deserve it.

#9 (permalink) 07-21-2009, 03:53 PM
igorskee Registered User Join Date: May 2009 Posts: 33	Re: severe yellowing of leafs look under the leaves, you might find spider mites. That is a sign, they start eating the bottom leaves first, then they go up... They can only be found under the leaf, never on top. I had same problem, and spider mites were the cause. Might not be in your case, but LOOK UNDER. I found hundreds of eggs and mites... Even all looked superb in first 3 weeks... __________________ yeepee yeepee yeepee yaa yeeeiii

#10 (permalink) 07-21-2009, 04:51 PM
fawohodie Registered User Join Date: Jan 2009 Posts: 374	Re: severe yellowing of leafs i checked under the laefs and no sign of spider mites or other type of insect. i have a bottle which is supposed to have lots of vitamins, micro nutes & trace elements, will try it with the next watering and see if something will change Plagron Phyt-amin anyone ever used it and what do you think? __________________ This is the garden's magic, That through the sunny hours The gardener who tends it, Himself outgrows his flowers.

#11 (permalink) 07-21-2009, 05:24 PM
fawohodie Registered User Join Date: Jan 2009 Posts: 374	Re: severe yellowing of leafs and is it true that epsom salt contains also calcium except magnesium?? __________________ This is the garden's magic, That through the sunny hours The gardener who tends it, Himself outgrows his flowers.

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