Can’t dial in, coco/ environment

These guys are one week into stretch and I’m trying to save them idk if they will last through flower if j can’t sort it out, in coco under 500watt actual draw 720e’s dialed down to 70% feeding twice a day, at 1.1 Ec or 550 ppm cal mag 2.5 ml, floramicro 2.5 ml, floragrow 1.25 ml, flora bloom 3.75 ml, uc roots .6 ml / gallon around 11 ml total per gallon, they are on drip emitters drain to waste, trying to dial in the ru currently at 50%, was at 70 five or take the last week or so, and get temps they are usually at 75 at canopy but with the adjust in humidifier right in the tent instead of in between the two tents the temp is going up need to crank the ac a little more, so it’s currently at 85 at canopy, and they are getting close to the light, when I tried to up the light intensity a little they grew shorter less stretching more new tips and pistols closer together but also showed more of the yellowing nute burnt looking tips symptoms, fans above and below canopies, in air pots, was too aggressive with the fans for a day or two had them blowing through the plants have both tents hooked up to an in-line, outside the tents,pulling air through from the tents to the filter, every time j think they are good they seem to do alright the display more symptoms they are still growing fast no current signs of pests

Curious to see what the experts think as well. BUMP

Are you having any real symptoms other than the discoloration? It ***could*** be a genetic trait.

yeah the tips of the leaves are brown you can’t see it that well in the pictures but the very very tips of them are passed the yellow discoloration point, one has rust spots on the older leaves down below, and the two green gelatos which are the least on the yellow, they are still a healthier green, have like twisted thick growth kinda, red purplish stems, they are 2 Frisian dews, the ones with the worst yellowing and burning also the ones growing the tallest fastest, and thinner, 1 hulk berry who is pretty much in the middle in terms of stretch and symptoms and the 2 green gelatos with almost no yellowing the smallest burns on the very tips shortest and bushiest but also the thickest twistiest growth and they aren’t very well ventilated in the plants they are super bushy but I can’t find a happy medium without fans blowing in there face all crazy and fucking up the leaves and well ventilated

What pH are you running? Are you certain your drip emitters are completely saturating the coco?

bEelzeBosS said:

What pH are you running? Are you certain your drip emitters are completely saturating the coco?

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Ph is usually 5.8 to 6.2 it swings because it’s a reservoir and aerated, saturation may be an issue but I got one in an 8 gal air pot, that one has 8 drippers, and the other 4 in 3.3 gallons all have 4 and if I look through the wholes it looks fairly well saturated, and decent run off, I feed them twice a day about 7 gallons a day, run off is probably like a gallon in each feeding and the one in the 8 gal air pot isn’t full to the top so I’d say it’s roughly 18 gallons of media

Maybe the ph swings?? Maybe I should ph it before each feeding??

I would pH to around 5.8 before each feeding. I don't think its an environmental issue. As far as saturation, try hand-feeding them for a week and see if that solves your issue...if so your drippers aren't saturating well enough causing salt pockets to build up.

bEelzeBosS said:

I would pH to around 5.8 before each feeding. I don't think its an environmental issue. As far as saturation, try hand-feeding them for a week and see if that solves your issue...if so your drippers aren't saturating well enough causing salt pockets to build up.

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What do you recommend to use for hand feeding them they take like 4 gallons a feeding, and I feel like it is a salt build up thing but how can I fix the drippers to accommodate that??

4 gallons total? How big are your containers and how many plants? When I hand feed I just use a long spout watering can. This is the one i use.

Guntherfredo said:

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What do you recommend to use for hand feeding them they take like 4 gallons a feeding, and I feel like it is a salt build up thing but how can I fix the drippers to accommodate that??

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I was about to say a watering can. I use a 1 gallon watering jug to hand feed. It's great for knowing exactly how much water they are taking, but not the best with obstructions in the way (LST tie downs, branches, etc).

If you want to eliminate salt build up as a culprit, stop using the drippers for now. Hand-water to significant run off at each feed. If they start to improve then you know where to place the blame and can adjust your drippers.

You said the tips are burnt and brown? Could possibly indicate a potassium deficiency with the crispy tips and I can see yellowing starting on the edges of the leafs. Also consider they are entering flower, where there is that increased demand for phosphorus and potassium.