tiny brown spots on top of fan leaves

[Samatha Sativa]

SOIL:

How long has this problem been going on? 2 weeks
What STRAIN are you growing? bag seed
What was the establishing technique? (seed or clone?) seed

What is the age of your plants? day 25 of flowering
How long have they been in the soil mixture they are in now?5 weeks
How Tall are the plants? 4'
What PHASE (seedling, vegetative or flower) are the plants in?Flower
What Technique are you using? (SOG, SCROG etc) Single plant
What size pots are you using? (Include how many subjects to pot) 5 gallon
What substrate/medium are you using? What brand of soil mixture are you using?(percentage of perlite, vermiculite...etc?) FFOF Straight
What Nutrient's are you using? FF Big Bloom FF Tiger Bloom
How much of each nutrient are you using with how much water? 1/2 strength
How often are you feeding? every other watering
If flowering, when did you switch over to using Bloom nutrients? 1week of flower
What order are you mixing your nutrients? (example: veg nutes 1st, bloom 2nd ect)
What is the TDS/EC/PPM of your nutrients used?
What is the pH of the "RUN-OFF"? 6.7
What method of pH test was administered? Using Strips? pH pen? Drops
How often are you watering? When the plant is lite about every 3 days
When was your last feeding and how often are you feeding? 2 days ago
What size bulb are you using? 400w HPS
What is the distance to the canopy? 8 inches
What is your RH Factor? (Relative Humidity) 46-50%
What is the canopy temperature? 78-80
What is the Day/Night Temp? (Include fluctuation range)78avg day/68avg night
What is the current Air Flow? (cfm etc.) 170 cfm
Tell us about your ventilation, intake exhaust and when its running and not running ? Carbon filter w/ 4'inline fan out /passive intake 24/7
Is the fan blowing directly at plants? oscillating fan
Is the grow substrate constantly wet or moist? no
Is your water HARD or SOFT? I dont know
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water? Tap left out for 24-72 hours
Are you using water from a water softener? no
Has plant been recently pruned, cloned or pinched? no
Have any pest chemicals been used? If so what and when? Hot shot pest strip
Are plant's infected with pest's? no
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Ok my problem is that I am getting little brown spots on the tops of my fan leaves, The under side of my fan leaves are no affected by this. It started at the canopy, and is slowly spreading to the other fan leaves. Any ideas what this could be? It does not seam to be affecting the growth of my buds? I dont think. This is my first time growing so I dont have anything to compare it to. Any help would be appreciated . Thanks very much.
~Samatha~

 

[Samatha Sativa]

Anybody have any ideas? Thanks.

 

[Hazy Lady]

Looks like a Calcium deficit to my old eyes Samantha. Cal mag is the cheese (remedy )

 

[Samatha Sativa]

Looks like a Calcium deficit to my old eyes Samantha. Cal mag is the cheese (remedy )

Oh ya sorry I forgot to say that I add 2 tsp of calmag to each gallon of water on the days I dont add nutes. Thanks for trying to help me! any other ideas?

 

[Hazy Lady]

Hi Samantha, I would still say it is a C problem, but for a second lets talk brown spot's, there are only 2 other problems i can think of that show brown spot's, a Manganese def' or you can be heading for a lock-out from PH problems and this is the warning sign?, I don't believe it is either, as I said I think it's Calcium, maybe you need to add more or maybe too much brings the same symptoms as a deficit? I don't know to be honest. Have a look at this pic, this is the closest I can find to your problem, do you think it's close? this is an advanced Cal def'.

If you think it needs a touch more Calmag it's easily sorted at least
Anyone else got any idea here?

 

[relief]

It could also be a bacteria infection.


Septoria glycines

 

[B.C.]

oh no!

oh no!

Oh ya sorry I forgot to say that I add 2 tsp of calmag to each gallon of water on the days I dont add nutes. Thanks for trying to help me! any other ideas?

Back off on the calmag. I have used that soil for years and rarely do I need calmag at all. Some strains want a lil extra now and then, but not much. I bet it's getting built up in the soil. I'd jus stick with the regular nutes and plain water. The spots won't go away, but they won't get worse either. Good luck! BC

 

[Samatha Sativa]

Thanks for the help everyone, I was just thinking do any of you think it could be a cause of my plant not getting any real fresh air? The reason I ask this is because I am growing down in my basement inside of a DR150, I have no real fresh air getting to my plant at all. I just have the passive intake bring in the air that is just sitting in the basement. I thank you all for your time and help!

~Samatha~

 

[Hazy Lady]

Re' Cal-Mag

Re' Cal-Mag

Hi BC, Do you know? if you give too much would you get similar spots?
I tell you what Samantha, your lamp is a little close at 8 inches, that could exasperate your problems. Fresh air is vital unless you use Co2.

 

[darookie2000]

Back off on the calmag. I have used that soil for years and rarely do I need calmag at all. Some strains want a lil extra now and then, but not much. I bet it's getting built up in the soil. I'd jus stick with the regular nutes and plain water. The spots won't go away, but they won't get worse either. Good luck! BC

It depends on your water. Mine doesn't have much cal or mag in it, so if I don't add it I see problems pretty quickly. I didn't lime my soil the first time around which probably hurt my cause too.

 

[B.C.]

too much...

too much...

Yes, it will. Sometimes spots, sometimes all the very tips (edges) all along the outside of the leaves. Maybe the spots are too much cal and the edges are too much mag? That's where deficienies affect them anyway? I don't know for sure on that, but I do know it will do it. I know calmag will build up in the soil too. I'd be willing to bet on it being the problem. lol Does that help? BC

 

[darookie2000]

Oh ya sorry I forgot to say that I add 2 tsp of calmag to each gallon of water on the days I dont add nutes. Thanks for trying to help me! any other ideas?

I usually add it with my nutes For a while I was adding it with both, but I locked out K by adding too much calcium.

 

[darookie2000]

Hi BC, Do you know? if you give too much would you get similar spots?
I tell you what Samantha, your lamp is a little close at 8 inches, that could exasperate your problems. Fresh air is vital unless you use Co2.

Adding too much calcium caused burning leaf margins for me because it locked out K.

 

[Samatha Sativa]

Hey Rook! I have missed you! I got my piece in the mail today! its pretty cool Ill take some pics 2morow and show you what It looks like.

 

[Hazy Lady]

It does help lots BC, I think i would start fresh with a good flush Samatha and see from there, hope you sort it, I know they're fine now but it will affect your bud development ultimately if not sorted.

 

[darookie2000]

Hey Rook! I have missed you! I got my piece in the mail today! its pretty cool Ill take some pics 2morow and show you what It looks like.

Haha, I missed you too, gc's not the same without ya! Nice Have you broken in the piece yet? I finally made a run, found a collective close to home, it only took me about 15 minutes! Lol, I'll definitely be going back there. It was a little more expensive than SF but definitely worth it.

 

[Samatha Sativa]

Ok thanks for the help Everyone! I will flush her out next watering, and supply some fresh air and back my lights off a bit, Thanks again!

 

[Samatha Sativa]

Haha, I missed you too, gc's not the same without ya! Nice Have you broken in the piece yet? I finally made a run, found a collective close to home, it only took me about 15 minutes! Lol, I'll definitely be going back there. It was a little more expensive than SF but definitely worth it.

Congrats on the Collective find! Nope I have not broken in my piece yet I have to wait for this damn plant to finish and cure before Ill be able to do that, I have not smoked in 6mos now, LOL needless to say I am getting very anxious, lol!

 

[darookie2000]

I'm thinking it looks like manganese deficiency the more I look at the deficiency charts. Calcium deficiency seems to mainly cause stunting but idk about spots like that.

 

[B.C.]

hmm...

hmm...

It depends on your water. Mine doesn't have much cal or mag in it, so if I don't add it I see problems pretty quickly. I didn't lime my soil the first time around which probably hurt my cause too.

I can see yer point. I've always used hard water. Do you use 2 tsp every other watering though?

Tiger bloom and big bloom have cal and mag, plus the soil has ground oyster shell as well. Do you use FFOF soil and the nutes? BC