Magnesium? - Auto Flowering - International Cannagraphic Magazine Forums

solista · 09-12-2017, 11:49 AM

Hi guys!
I´m running this Blackshead auto and the day before yesterday some leaves started to get yellow. Is this a Mg deficiency?
Soil: peat + perlite, some composting liquid @ 3-1-1 NPK and a few days ago some peruvian bat guano. PH at 7.0.
Thanks,

aridbud · 09-12-2017, 04:13 PM

https://www.growweedeasy.com/why-cannabis-leaves-yellow

solista · 09-12-2017, 08:26 PM

Thanks. I checked it out and seems to be OK these lower/early leaves get yellow and drop. Anyways, I add some Epson salts. I´ve been trying to lower PH but to no avail. Watering with 6.3 water PH by adding lemon drops. BTW, organic.

calisun · 09-13-2017, 04:07 AM

I'd think it was low P due to them being in flowering and needing more P and the purple petiole and necrosis. You haven't fed them anything other than what you listed?

solista · 09-13-2017, 11:56 AM

And a banana´s tea. Tomorrow I´ll apply some bone powder (0-20-0) and comfrey tea (8-2.6-20.5)

Cobshop · 09-25-2017, 02:14 AM

99% positive it's from nutrients being splashed on the leaves. This is very common and usually freaks people out. I would not start adding adding more

09-12-2017, 11:49 AM	#1
solista Newbie Join Date: Jul 2017 Location: Planet Earth Posts: 12	Magnesium? Hi guys! I´m running this Blackshead auto and the day before yesterday some leaves started to get yellow. Is this a Mg deficiency? Soil: peat + perlite, some composting liquid @ 3-1-1 NPK and a few days ago some peruvian bat guano. PH at 7.0. Thanks, Attached Thumbnails
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09-12-2017, 04:13 PM	#2
aridbud automeister Join Date: May 2013 Location: the best place on earth Posts: 5,589	https://www.growweedeasy.com/why-cannabis-leaves-yellow __________________ Seeds have the power to preserve species, to enhance cultural as well as genetic diversity, to counter economic monopoly and to check the advance of conformity on all its many fronts. Michael Pollan Happiness held is the seed; Happiness shared is the flower. John Harrigan Instant gratification takes too long. Carrie Fisher - RIP. *afterthought autos* We are passionate breeders of unique quality cannabis autoflower hybrid seeds at down to earth prices; now 11 years running! https://www.icmag.com/ic/forumdisplay.php?f=65770
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09-12-2017, 08:26 PM	#3
solista Newbie Join Date: Jul 2017 Location: Planet Earth Posts: 12	Thanks. I checked it out and seems to be OK these lower/early leaves get yellow and drop. Anyways, I add some Epson salts. I´ve been trying to lower PH but to no avail. Watering with 6.3 water PH by adding lemon drops. BTW, organic.
	Quote

09-13-2017, 04:07 AM	#4
calisun Member Join Date: Jun 2014 Posts: 139	I'd think it was low P due to them being in flowering and needing more P and the purple petiole and necrosis. You haven't fed them anything other than what you listed?
	Quote

09-13-2017, 11:56 AM	#5
solista Newbie Join Date: Jul 2017 Location: Planet Earth Posts: 12	And a banana´s tea. Tomorrow I´ll apply some bone powder (0-20-0) and comfrey tea (8-2.6-20.5)
	Quote

09-25-2017, 02:14 AM	#6
Cobshop Newbie Join Date: Sep 2017 Posts: 2	99% positive it's from nutrients being splashed on the leaves. This is very common and usually freaks people out. I would not start adding adding more
	Quote