Problem after problem and now stumped, plz help

[Grateful Zach]

Hey man that isn't light bleaching.. Light bleaching would normally show on all the leaf, not just the tips as you're showing us. I've bleached before with my 600 HPS cool tube right above my plants and bleaching actually turns everything white, and you wouldn't see it as much on the lower leaves. Your issues looks like it's coming from the roots, not an environmental issue.

That said, what kind of soil are you using? How often do you feed? Is your ph meter accurate or are you using those cheap strips? I burned the shit out of my first auto run, I'm just now getting them healthy again. This site is great and we are more than happy to help, but we need details to properly diagnose your issue.

Cheers man, hang in there.. You Are Not Alone!

 

[Learner]

N also off topic agen soz but tangs guide is probs a bit too old to expect replies now, does he blend the Nutes into 1 another like when they crossover to bloom n also build up to them doses or just full whack from the first day of that weeks recipe?

 

[Learner]

Thanks for ur reply zach yeh maybe my ph is outta whack as Briman sed I'll check run off next feed, i use a digital tester, biobizz light mix, at day 25 n only had 2 mild feeds as they smaller than norm n had sum issues so wanted to go easy on em, u think that may of caused a def? Atleast I'm glad it's not bad bleaching as cant distance my light anymore than it is, thx agen n wat autos u like?

 

[Grateful Zach]

Thanks for ur reply zach yeh maybe my ph is outta whack as Briman sed I'll check run off next feed, i use a digital tester, biobizz light mix, at day 25 n only had 2 mild feeds as they smaller than norm n had sum issues so wanted to go easy on em, u think that may of caused a def? Atleast I'm glad it's not bad bleaching as cant distance my light anymore than it is, thx agen n wat autos u like?

I'm not that knowledgeable with autos but I do know they are MUCH more sensitive to nutes. I really tried to take it easy on mine and I still burned em, pretty bad too. I've always grown photos so I'm probably not the one to really count on for nute problems haha! Anyway, I've used Sledgehammer to flush my soil in the past and it works great to allow you to somewhat "start over". In my experience using that with photos I've had really good luck, it's a great product for us beginners! Also, make sure your ph meter is calibrated or you'll get bad info from it and possibly make the problem worse.

I've only smoked a couple strains of autos and I don't even remember what they were. My grow buddy grew some a couple years ago but that's my only experience with them. They give growers some different options, I just wanted to see what all the fuss was about! So far I'm loving the grow, starting a photo run now but will run autos this winter when the temps drop. Good luck my man, they'll be fine!

 

[briman]

Your light height might prove to be a problem when the plant gets taller. Also, Cal/mag is a necessity with LED. Some growers dont need it right away, while some need it by week 3. Most times PH is the culprit, but it looks to me like a Nitrogen deficiency. TaNg uses his nutes JUST like he describes in his link!! No building up to anything. In between veg and flower, he flushes the plant, then goes right into flower. He has a couple of links in the fert section, check em out. Nitrogen deficient. See...
http://www.marijuanapassion.com/forum/attachment.php?attachmentid=158412&d=1295751999

 

[briman]

RO water or tap??

 

[Muddy]

I'm not seeing any light bleaching in those pictures. Bleaching will occur on the top leaves, the ones closest to the light, and will show as a white/yellowing of the leaves, starting from the center and working outward. That looks more like the beginnings of a phosphorus/potassium deficiency. Are the leaf stems showing a red color? A feed and run off pH of 6.3 is fine, right where it should be. The Canna nutes you are using, are they the AN pH Perfect? Also, watering every other day may be a bit too much. Your soil could be staying too wet, cutting off needed oxygen to the roots. Depending on your pot size, I wouldn't expect plants in Light Mix under LEDs to need watering more than every 4-5 days.

 

[jackmc]

Is there any chance your plants were cold for a period? I know that causes reddening of the leaves.

 

[Learner]

Thanks agen for all the replies,I'm using tap Briman n wat problem do u think ill bump into, them getting too close to the light? Can't see it being a problem this time as they have been stunted considerably but a concern for the future then?
Don't think it was told cold jack temps don't go below 24-25, as soon as the seedling went under they like illuminated red under the light n after several hours they were like stained red so sounded like the definition of bleaching to me tho never seen it b4,
thanks a lot for ur input too muddy I'm defo realising i need a significant reduction in the amount of watering as as uve sed as they r not drying nowhere near as quick as norm, I'm using AN ph perfect and indeed the stems r red which I knew was a sign of deficiency possibly mag too

after a day of letting em play out i noticed that ive had a few progress to subtle browning in the tips and tips on the sides of the leaves now (seems like classic nute burn) so reckon wat happened was I went too careful and caused one or more deficiencies then wen I realised that n thought ooo day 23 n only 1 weak feed I went a bit too strong n burned em

these babies have been thru the wars already lol but aslong as it's just the case of them pulling thru a bit of gentle burn now then i shud b back on track in a cpl days, thx to all for helping me out n put me at ease it helped a lot with this new learning curve

 

[Muddy]

The combination of tap water and AN pH Perfect could be the issue. The pH Perfect line was designed to work with RO water. For it to work with tap water the pH of the water should be below about 8 and the PPM of the water must be between 100 - 125. I tried using it with bubbled tap water that had 250 ppm. The results were terrible. You will need to test your tap water, or contact the water company, and find out the ppm of your water. If it is out of range as I suspect you will either need to change to different nutrients or change your source water to something compatible, like RO or distilled.

BTW, the red is not bleaching. That's more likely a lockout of, or lack of phosphorus. Bleaching removes all the chlorophyll, turning the leaves white/yellow.