Advertise On Marijuana Passion

Magnesium Deficiency

getnasty

Well-Known Member
Joined
Sep 22, 2011
Messages
656
Reaction score
37
Am I correct in my diagnosis of this being the early signs of a magnesium deficiency? I gave her a shot of Cal-Mag yesterday with her feeding as a precautionary measure.

2012-05-08_17-35-11_781.jpg
 

ShOrTbUs

Well-Known Member
Joined
Apr 25, 2012
Messages
1,509
Reaction score
43
from what i read about mg def. the veins usually remain green while you get the discoloration between the veins, the veins of your leaf tips appear a reddish color

edit: sorry my eyes were playing tricks on me, i was focusing on the wrong thing, i see the interveinal color change... i needed to take a 3rd and 4th look lol
 

getnasty

Well-Known Member
Joined
Sep 22, 2011
Messages
656
Reaction score
37
Tomorrow I'm feeding with a mid-week dose of cal-mag. Watered tuesday with my normal feeding + cal-mag. This should do the trick, I'm hoping. Haven't gotten any feedback on this except for you shorty, so +rep for you brother. Thanks for your time and interest! I'll update on this again on Tuesday when I feed again.
 

Growdude

I am the Smo King
Joined
Oct 25, 2006
Messages
4,572
Reaction score
3,226
Really need to know your PH before diagnosing your problem.
Also what have you been feeding it and how strong?

If you have a lockout adding more wont help.
 

getnasty

Well-Known Member
Joined
Sep 22, 2011
Messages
656
Reaction score
37
My pH is fine, meter bounces back and forth from 6.9-7.0.

I've been feeding them with Fox Farm nutes. Grow Big, Big Bloom, Tiger Bloom, Open Sesame, and will be using Cha Ching starting next week, if permissable. The bottle of Tiger Bloom says a normal feeding is 4 tsp of solution per gallon of water so that's what i've been doing. The Big Bloom is added at the recommended 4 tsp per gallon of water for the last 2 weeks; the first 2 weeks, I added the half of the recommended heavy feeding to each gallon of water. And the Open Sesame is a 1/2 tsp per gallon. I add all this to each gallon of water and water thoroughly and slowly.


Ty Growdude=]
 

Coho

Well-Known Member
Joined
Mar 16, 2012
Messages
51
Reaction score
4
I heard several people say Tiger bloom is very strong and they use less that full dose. Don't know myself I don't use it.
 

getnasty

Well-Known Member
Joined
Sep 22, 2011
Messages
656
Reaction score
37
Yes, I've noticed. I checked on them a few moments ago and now a lot of the fan leaves are drooping. Gave them just water today, and will continue to do so until 5/22. If the fan leaves perk back up before then, I may continue with feeding next Saturday.
 

Hushpuppy

Dr MadBud
Joined
Mar 27, 2011
Messages
6,441
Reaction score
289
Hey sorry I wasn't around to help out, although my experience is more with hydro than soil, I still like to help if I can. The only thing is the lighting in the picture is really limy yellow, I assume from the lighting. Is that the actual color of the leaves or can you take a pic with regular light on her as its hard to tell anything from that pic.
 

getnasty

Well-Known Member
Joined
Sep 22, 2011
Messages
656
Reaction score
37
Yeah bud, lights come back on in a couple hours. When I wake up in the morning, i'll pull them out of the closet and snap a few true light pictures to further assist you. Doesnt really matter hydro versus soil when trying to determine deficiencies/toxicities i dont think! And thanks for stopping by and offering your assistance! I'd like to get the issue fixed immediately so my yield isn't greatly impacted.
 

getnasty

Well-Known Member
Joined
Sep 22, 2011
Messages
656
Reaction score
37
Thanks for the info Dan, I'll get that corrected straight away!

Pics of the leaves without the lights over them, along with pics of the entire bush, and a couple of the cola's. In the first pic, is that Potassium burn/necrosis? Also, if my pH has been off this entire time, why has it taken until now for it to show itself?

2012-05-13_12-42-27_535.jpg


2012-05-13_12-42-31_957.jpg


2012-05-13_12-42-36_798.jpg


2012-05-13_12-42-41_583.jpg


2012-05-13_12-42-46_566.jpg


2012-05-13_12-42-51_3.jpg
 

Hushpuppy

Dr MadBud
Joined
Mar 27, 2011
Messages
6,441
Reaction score
289
That looks like regular "yellowing off" in flower to me. how far into flower are these girls? And what is their projected flower time? Are these in soil or hydro? If the "yellowing off" seems to be occuring too soon it may be that the plant has not recieved enough Nitrogen while in veg and is now not getting enough to finish green.

The bad thing here is if they are mid way through flower and the Nitrogen has played out, you can't dump some in to fix anything as that can stall the flowering. If they aren't getting any Nitrogen at this point, you can add back a small amount (about 1/4 of veg level) and it should help sustain them until closer to harvest. :)
 

getnasty

Well-Known Member
Joined
Sep 22, 2011
Messages
656
Reaction score
37
Im not sure that its regular yellowing off, to be honest, as this began happening after a heavy flowering feeding of Big Bloom and Tiger Bloom. Also, there seems to be a few necrotic spots on the leaves, and if you look closely, you can see small rust spots between the fanleaf veins; indicative of a nutrient problem or pH problem. I assumed the yellowingwas associated with the rusting. Also, I gave them heavy feeding the entire way through veg with Grow Big, and transplanted right before flowering into a 5 gallon smart tote filled with Fox Farm Ocean Forrest amended with perlite and dolomite lime. It came out of a 3 gallon of the same mix. Should be plenty of nitrogen for her, right?
 

getnasty

Well-Known Member
Joined
Sep 22, 2011
Messages
656
Reaction score
37
Good reads, very informative! I think this may be what I'm experiencing. On another plant, a much smaller one, it's not producing as well as the larger one, but it also was a few weeks behind her. However, on the fabric grow bag I'm, using for her, there are white streaks down the sides where water has come out and dripped down the side. This seems now like a red flag for what we're looking at here. Saturday I watered them with straight water. I'm thinking about watering again tomorrow afternoon with epsom salts. Opinion? I usually water/feed on Tuesdays anyways. A day early shouldn't hurt, especially when time is of the essence in saving those glorious cola's of herbal love. ;] They are entering week 5 of flower on Tuesday, 05/15/12. I'm anticipating a potential harvest date of June 12-19, but will behind checking trichomes around the 7th. Harvest could be as late as 16 June, I think. They went in at seed 2/14/12, popped up on the 17th. The other, smaller plant, was 3 weeks behind I believe. The large plant, in pictures above, vegged for about 7.5 weeks.

Should I top dress with some Lime before hand? Do you have an treatment plan, Dr. Dan?
 

LEFTHAND

Well-Known Member
Joined
May 13, 2009
Messages
1,379
Reaction score
191
getnasty said:
Good reads, very informative! I think this may be what I'm experiencing. On another plant, a much smaller one, it's not producing as well as the larger one, but it also was a few weeks behind her. However, on the fabric grow bag I'm, using for her, there are white streaks down the sides where water has come out and dripped down the side. This seems now like a red flag for what we're looking at here. Saturday I watered them with straight water. I'm thinking about watering again tomorrow afternoon with epsom salts. Opinion? I usually water/feed on Tuesdays anyways. A day early shouldn't hurt, especially when time is of the essence in saving those glorious cola's of herbal love. ;] They are entering week 5 of flower on Tuesday, 05/15/12. I'm anticipating a potential harvest date of June 12-19, but will behind checking trichomes around the 7th. Harvest could be as late as 16 June, I think. They went in at seed 2/14/12, popped up on the 17th. The other, smaller plant, was 3 weeks behind I believe. The large plant, in pictures above, vegged for about 7.5 weeks.

Should I top dress with some Lime before hand? Do you have an treatment plan, Dr. Dan?
getnasy..
that there looks like normal flower yellowing.. like hush said..
but thats jmo..
LH
 

getnasty

Well-Known Member
Joined
Sep 22, 2011
Messages
656
Reaction score
37
TheThe article you posted said straight water will not be enough to pull a lot of salts out on its own and they recommended adding a tbsp of Epsom salt for that reason. :eek: isis the Epsom salt they sell at the dollar store the same stuff?
 

Hushpuppy

Dr MadBud
Joined
Mar 27, 2011
Messages
6,441
Reaction score
289
Yeah, I think Mr. Liberty is correct. After getting all the info, it looks like a nute lockout and flushing is the answer to that. I have also heard that FFOF is notable for having salt buildup so it all makes sense. Those colas are definitely pretty. They gonna be some monsters by the harvest :)
 

Latest posts

Top