does any one know if chemical burning is a cause for yellowing of the leaves? i have done a few soil tests and they have come up with bellow average amount of nitrogen, BUT i have been feeing them once every 2 days now. any sugestions?
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does any one know if chemical burning is a cause for yellowing of the leaves? i have done a few soil tests and they have come up with bellow average amount of nitrogen, BUT i have been feeing them once every 2 days now. any sugestions?
IF your tests show now N, then why do you think you've got fert burn? Burn gives you brown tips and edges. N def gives you yellow leaves. You need more N.
What have you been feeding them?
been feeding them bio-gro, a organic fert. mix it up with water, 1ml with every liter. (8.0-2.0-6.0) feed once every 2 days. the leaves go yellow and then the tips go brown and crisp up, eventually the whole leaf crisps up
some pics, seems to be getting worse, really need some help asap!!
might have to flush to be sure, but if any one has seen this before and sorted it out please let me know.
thanks
up your dose of nitrogen.also what is the ph of your soil?what size buckets are you using?
ph is bout 5.6 have added lime to bring it up, and most are in 3 gallon buckets, and 2 are in 8gallon buckets. would lack of n cause the crisping of the leaves too?
yea leaves get crispy from a lack of n.your ph was low probably locking out nutes also.i would watch for signs of being rootbound on the 3 gallon pots.
before i start to feed them more just wanna ask if this definatly isnt a burn as i am a bit parra about this grow. would a burn turn leaves yellow at all? really appreciate your help!
you would want your ph to about 6.0-6.5
I think the tips going brown could be a little burn, but with your ph being 5.5, it affects the absorption, while the plant is draining the food from those leaves, causing the yellowing as a sign of N deficiency. It might be best to stop feeding, adjust your ph, and give water, it will mix with the ferts already present in the soil.
when in doubt, it wont hurt to not fert
This is absolutely on target. Excellent advice. Flush, test runoff pH. Adjust.Quote:
Originally Posted by GatzBurst
I ahve
Ignore the top post please soprry!
I have leafs that start with burn on the tips then Move to the whole leaf very similar to your plants. My Ph is 6.5 to 7 I have only feed my plants water for a few weeks now. Becasue when I satrted out I gave them too much Nutes and this turned all the Veins purpal and stunted growth. Should I be considering to feed the plants again? The leafs are still starting Geen then slowly after a week turing yellow and Looking very similar to his plants. Is nitrogen found in my Plant food? I guess it might be time to start giveing them small amounts of food again. Ill try and get som picture tonight.
Sorry to add to your thread but It seems I may have same problem.
kd_special
Uh oh. If you don't know the components of fertilizer, and haven't read the freaking bottle to find ou twhat they are, how do you expect to handle the more complicated problems that growers encounter?Quote:
Originally Posted by kdspecial
The first number is N!!!!!
Yeah I should have known that.... I am learning. haha thanks for all the help with thsi and other problems I really appreciate it. I know I actully know more than I think but am kinda scared to use any of it. but I have basically considered this grow a throw away and am using this as my experment crop. I am gonna try training some plants and I imagine I will torture my plants some other ways as well. but next grow I will have all the info needed. Or at least see a better result. Im my weed plants and in my Balcony garden as well as i can kinda apply this knowledge to that garden as well.
Thanks again as you ahve helped me more than others in the past few weeks. Ill mail you a BUD. If i end up with any at all...
Thanks
kd
your numbers on your ferts such as 20-20-20= N-P-K
N=Nitrogen, P=Phosphorus and K=potassium. This should
be one of the first things you learn when starting out.
Don't be afraid of your knowledge. Apply it. Then you won't even think of this as a throwaway, just as a starting place.Quote:
Originally Posted by kdspecial
guys thanks allot for all the help, i have now fushed the plants, the ph was much too low. been doing allot of research and appritaite all the help and intrest of every one here. i have added more time and just water. the the ph is 6.6 now, BUt the top 1-2c the ph is 8.2, is this to worrie about?
i will now just water my plants for about a week and then start added ferts again. should i continue with the feeding program i had b4 or was that heavy feeding the cause for all these problems?
thanks
heavy ferting is what lead to the low PH, just ease-up on them for awhile, that flushing you did will help immensly, they look really good, but the damage that is done probably wont go away/get better, the plants will just continue to grow healthy. Check that PH every week, words to live by IMO. 6.6 is probably fine since they were low for so long, you may want to gradually raise it a bit, the 8.2 on top should dilloute over time (as long as they are getting fresh water). use just water with a bit of lime (to raise it a tiny bit) for the next 2-3 waterings and check the PH between waterings.
here are some pics of what they look like now after all the advise, i have removed all the effected leaves now too.
can thank you guys enough, was getting very worried.
i will take it bit more easy from now on.
new pics up here
http://boards.cannabis.com/showthread.php?t=70789
If N def causes yellow leaves should the problem subside alittle on its own when flowering starts? seeing that the plant dosent need as much N as it once did in veg.
No, it will get worse. You should always fix any nutrient problems before starting flower. Flowering nutes have very low N. You have to withhold N to get the plant to flower properly, but it still can use nitrogen. The leaves may yellow towards the end of flowering, but growers who have their feeding program really dialed in do not have this problem. The final repotting when you are going to start flower should include some rich organic material that the plant can slowly use.
how long untill i should start feeding them again? i am using an organic fert (liquid) says 1 or 2 ml per liter, (8.0-2.0-6.0), i was feeding every 2 days, but i now realize that this was too much. any suggestions so i wont get this ph/ burn problem again?
just checked pH, was 6.7.
still a little high, but better. 6.0-6.5 for soil.
How do you adjust the ph of the soil stinkyattic? I know how to test runoff, but then how do you fix it?
i been adding lime to the top soil little by little untill the ph was higher