Browning on leaves

[dreaded]

How long has this problem been going on?
about a week and a half
Are you growing in a PVC grow tent? (example: Hydrohut or any other non brand tents)
no
What system are you running? (DWC? Ebb flow? Aero? Water Farm? Flood Tables? and so on...)
coco, hand water to waste
What STRAIN are you growing?
snowdog & g13-diesel...only on 2 plants
What was the establishing technique? (Were the seed or clone?)
seed
What is the age of your plants?
a little over a month
How long have they been in there mixture they are in now?(coco,soiless etc..)
a little over a month
How tall are the plants?
about 2 feet
What PHASE are the plants in? (seedling, vegetative or flower) are the plants in?
veg
What Technique are you using?
xmas tree.. plan on topping
What substrate/medium are you using?(Hydroton, RockWool etc.)
coco
What is the Water temperature?
don't know
What color are your roots? White? Brown? Are your roots slimy?
white
What Nutrient's are you using?(If growing soiless)
gh series...micro & bloom
How much of each nutrient are you using with how much water?
6ml micro... 9 ml bloom..gh*Knowing the brand is very helpful*
How often are you feeding? (If using soiless)
every 2-3 days
How often are you giving nutrients? (If using soiless)
every fedding
If flowering, when did you switch over to using Bloom nutrients?
n/a
What order are you mixing your nutrients? (example: veg nutes 1st, bloom 2nd ect)
micro first..then bloom
What is the TDS/EC/PPM you are using?
n/a
What is the pH of the "Tank"?
ph pen went out on me.. can't afford a new one right now
Are you sure your calibration is correct on your equiptment?
no... not right
When was your last watering?
today
What is your water temps?
don't know
When was your last feeding change? (ie. grow-bloom-micro-additional)
n/a
How often do you clean your system: example: Flush out water replace with clean water and nutrients?
i flush once a week
What size bulb are you using?
400
What is the distance to the canopy?
1-1/2 feet
What is your RH Factor(Relative Humidity)?
45%
What is the canopy temperature?
75 degrees
What is the Day/Night Temp? (Include flucutaion range)
don't know
What is the current Air Flow? (cfm etc.)
4oo something dayton blower
Tell us about your ventilation, intake exhaust and when its running and not running ?
always on
Is the fan blowing directly at plants?
no
Is your water HARD or SOFT?
soft
What water are you using? Reverse Osmosis (RO)? Tap? Bottled?
Well water? Distilled? Mineral Water?
tap
Are you using water from a water softener?
no
Has plant been recently pruned, cloned off of or pinched
no
Have any pest chemicals been used? If so, What and When?
no

Are plant's infected with pest's
no



I figure it's my ph.. pen needs new tip, can't afford one right now. the spots are on a couple of leaves.. not a problem right now.
Can't get a new tip for 2 more weeks. Anything i can do till then ?



roots are white... no slime

 

[Stevius]

Looks like Calcium deficiency.

Check your PH.... Calcium gets locked out at low PH

I think the problem maybe in coco. Since it is the medium that can cause fixation of Calcium.
Not sure, so it is better if you get another opinion. But I bet my money on coco

Good luck!

 

[ScrubNinja]

Yeah I hear a lot of people complaining about cal/mag deficiencies in coco. I've been using coco over a year and never had significant problems. I believe you can use a product called calmag, but it seems you can also fix it by upping the ph to 6 or 6.1 ish (I read). Apparently all the cal/mag you need is already in your nutes, it's just that the ph is stopping it from being taken up by the plant. I'm on my first grow with tap water this time and I did the ph thing around week 2 or 3 of flower for a week, just in case the tap water was gonna be an issue, and still don't see any problems.

 

[dreaded]

Thanks for the reply's fellas, i think i'll try some calmag, i have some but didn't need it till now. Then again, i need to get my ph pen fixed also(new tip).

 

[Stevius]

yeah.... PH first and then do some action!

Good luck mate!