Help! Nitrogen deficiency?

Elguapoot

Elguapoot

Member
Everything has been going along beautifully, buds in full swing but starting to show signs of yellowing leaves with light brown spots on them. I’ve also noticed that the yellowing appears to only be on the leaves at the very top of the plant, below that appears to look alright. Could it be light damage? It’s an royal dwarf auto flower so I have kept fertilizing to a minimum so as not to over do it as I did once and corrected course. I’ve attached a couple of pics any advice and info is much appreciated. I don’t want everything to go pear shaped this late in the game.

cheers.
 

Attachments

Killaki

Killaki

Well-Known Member
Elguapoot said:
Everything has been going along beautifully, buds in full swing but starting to show signs of yellowing leaves with light brown spots on them. I’ve also noticed that the yellowing appears to only be on the leaves at the very top of the plant, below that appears to look alright. Could it be light damage? It’s an royal dwarf auto flower so I have kept fertilizing to a minimum so as not to over do it as I did once and corrected course. I’ve attached a couple of pics any advice and info is much appreciated. I don’t want everything to go pear shaped this late in the game.

cheers.
Click to expand...
Ok so let's break this down logically and see if we can crack this nut with the info provided. There could be any number of things going on to cause issues like this. From what I can tell it's from the top down? If that's the case, top down bleaching/burning problems tend to be light problems.
If it's from the bottom up it gets much more complex diagnosing. I won't list all of the reasons because it's a long list. I'll wait to see your response and provide tips from there.
Also just to throw it out there, make sure it's not fungus. It doesn't look like it from your pics but you're the one actually there. Maybe some better follow up pics and more info?
 
weRideVRods

weRideVRods

Active Member
I would agree with @Killaki, step one raise the light source, second and this really depends on your feeding and type of nutes used cal-mag ect,ect,ect and correct ph will get your leaves back in shape. last but not least air flow to budsites is a must or your gonna have fungus issues also dont be afraid of a lil tip burn I range my ph from 5.7 to 7.7 through out my weekly water and nute feeding schedule and remember theres a difference between feeding and watering.
 
weRideVRods

weRideVRods

Active Member
lol no worries what do you p.h at after feeding, and do you feed till run off ie it starts draining, assuming its soil of course and do you have drainage holes if not make some, then ph ph ph
 
Elguapoot

Elguapoot

Member
weRideVRods said:
lol no worries what do you p.h at after feeding, and do you feed till run off ie it starts draining, assuming its soil of course and do you have drainage holes if not make some, then ph ph ph
Click to expand...
PH at about 6.8 after feeding. I do water until run off. It is soil and there are lots of drainage holes.
 
Elguapoot

Elguapoot

Member
Killaki said:
Ok so let's break this down logically and see if we can crack this nut with the info provided. There could be any number of things going on to cause issues like this. From what I can tell it's from the top down? If that's the case, top down bleaching/burning problems tend to be light problems.
If it's from the bottom up it gets much more complex diagnosing. I won't list all of the reasons because it's a long list. I'll wait to see your response and provide tips from there.
Also just to throw it out there, make sure it's not fungus. It doesn't look like it from your pics but you're the one actually there. Maybe some better follow up pics and more info?
Click to expand...
definitely top down. I’m growing in a space bucket and as you can see in the pics I’ve been extending the bloody thing into the sky to keep the lights far enough away but maybe not far enough. Regarding possible fungus, it definitely doesn’t look that way to me. The spots are very brown and dry looking which looks like a burn more than anything else.
 

Attachments

weRideVRods

weRideVRods

Active Member
yea after looking at those spots they remind me of a cal. issue I had awhile back I started giving all my ladies cal/mag once a week and now I do it with every strain regardless I'm out fishing right now but when I get home I'll post my feeding products it's the easiest I've found in a long time and it's working great.
 
hotrodharley

hotrodharley

Well-Known Member
Caution to all others regarding cal mag. First check your nutes for calcium and magnesium content. Excess of any single nutrient can cause lockout of other nutes. Calcium is a major offender because . . well cal mag. Just FYI.
 
Killaki

Killaki

Well-Known Member
Elguapoot said:
definitely top down. I’m growing in a space bucket and as you can see in the pics I’ve been extending the bloody thing into the sky to keep the lights far enough away but maybe not far enough. Regarding possible fungus, it definitely doesn’t look that way to me. The spots are very brown and dry looking which looks like a burn more than anything else.
Click to expand...
Instead of extending the height of the light, have you considered tying the plant down some? I'm a little surprised you're getting this with CFLs but they can run a little hot in tight places. What's your temp like at the top of the canopy? I can't help but feel like you're experiencing light burn. It looks like a duck, walks like a duck... Either way if you haven't given some sort of calcium/magnesium it probably wouldn't hurt it.
 
weRideVRods

weRideVRods

Active Member
honestly we could go in circles here but like @hotrodharley said without testing levels of independent nute levels it's a process of elimination I dont go too hard on the cal-mag but have heard of ppl going to heavy
 
hotrodharley

hotrodharley

Well-Known Member
weRideVRods said:
honestly we could go in circles here but like @hotrodharley said without testing levels of independent nute levels it's a process of elimination I dont go too hard on the cal-mag but have heard of ppl going to heavy
Click to expand...
Because for a long time the answer to all problems was cal mag. So much so that people started overdoing it.

That’s why it’s a punchline line now. Like “about a pound.”
 
Elguapoot

Elguapoot

Member
Killaki said:
Instead of extending the height of the light, have you considered tying the plant down some? I'm a little surprised you're getting this with CFLs but they can run a little hot in tight places. What's your temp like at the top of the canopy? I can't help but feel like you're experiencing light burn. It looks like a duck, walks like a duck... Either way if you haven't given some sort of calcium/magnesium it probably wouldn't hurt it.
Click to expand...
I'm really weary of feeding too much as it is an auto flowering plant and from what I've read and been told auto flowers are pretty sensitive and don't require lots of nutes. Now that it's in full budding stage I've been feeding it 1/4 tsp per half gallon of Fox Farm Big Bloom every other feeding (every year 10-14 days).

The space bucket thing was great as a first time growing experience and made things really easy for quite a while. It only became a problem once it got taller in the later stages. I'll probably use a totally different set up next time and learn from my mistakes re: feeding and light for the next grow. As far as the yellowing and brown spots on the leaves, As long as it's nothing fatal and it remains just at the top with no serious spreading, It looks like it should turn out to be an overall successful first grow.

Thanks to everyone for the input and info.
 
You must log in or register to reply here.
Top