Help with yellow leafs - Auto Flowering - International Cannagraphic Magazine Forums

solista · 08-09-2017, 02:58 PM

Good morning,
I´m running this auto Copacabana from https://www.maconhaseedsbank.com/producto/copacabana/
and don´t know if this yellow leafs are due N or Mg. Soil PH is 7.0 and trying to lower it to no avail.
Thanks,

Koondense · 08-09-2017, 04:17 PM

Looks like a problem with nutrient absorption, there may be many different factors.
Maybe the roots need more air, check if there's a water retention issue. The soil is a mix of what? Looks quite tough.

mushroombrew · 08-09-2017, 04:47 PM

Looks Like Mag and Nitrogen deficient. Flush soil with pH 6.5. Make a mild, like half strength, fertilizer solution. 3 times the volume of the pot @ pH 6.5.
This will correct pH and feed it too. Will also flush any salt buildup that is contributing to nutrient "lock out"

08-09-2017, 02:58 PM	#1
solista Newbie Join Date: Jul 2017 Location: Planet Earth Posts: 12	Help with yellow leafs Good morning, I´m running this auto Copacabana from https://www.maconhaseedsbank.com/producto/copacabana/ and don´t know if this yellow leafs are due N or Mg. Soil PH is 7.0 and trying to lower it to no avail. Thanks, Attached Thumbnails
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08-09-2017, 04:17 PM	#2
Koondense Senior Member Join Date: Nov 2012 Posts: 2,264	Looks like a problem with nutrient absorption, there may be many different factors. Maybe the roots need more air, check if there's a water retention issue. The soil is a mix of what? Looks quite tough. __________________ :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: Zamaldelica x KaliChina under LEDs Pangi and Friends under LEDs Zamal Hashplants and Friends under LEDs Testing ..:: La Buena Hierba ::.. Outdoors
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08-09-2017, 04:47 PM	#3
mushroombrew Senior Member Join Date: May 2009 Posts: 1,884	Looks Like Mag and Nitrogen deficient. Flush soil with pH 6.5. Make a mild, like half strength, fertilizer solution. 3 times the volume of the pot @ pH 6.5. This will correct pH and feed it too. Will also flush any salt buildup that is contributing to nutrient "lock out"
	Quote 2 members found this post helpful.