brown spots, pics inside, please help>

[unitedgrooves]

What up y'all, I got 4 bubbas going right now and one out of the 4 one is giving me shit.. They are in FF Ocean Forest 3gal containers and i'm feeding them big bloom 3tsp/tiger bloom2tsp/2tsp cal mag per gal every watering. [email protected] with RO water. The rest of the plants are looking nice.. Now going on week 3 of 12/12. The one with the problem is double potted and was vegged for 3 months and is the largest of the bunch.. I have a few pics.. Let me know what you guys think is the problem.. Basically the leaves turn brown and die off quick.. I'm running 2 lights 1k & 600 side by side air cooled.. Room temps 78-83, RH@45-50% I have an AC unit + Co2 in a sealed room with a controller.Please Help!! Thanks in advance

 

[MickTheBrag]

its the start of some heatstress, make sure the plants are getting enough air. a fan blowing across the tops from the side helps.

 

[unitedgrooves]

Don't think its heat temps are right on... Yo, 10K where you at?? or anyone that knows, look at especially pic #3.. Thanks

 

[unitedgrooves]

SOIL:

How long has this problem been going on?
2 weeks

What STRAIN are you growing?
Bubba Kush

What was the establishing technique? (seed or clone?)
seed

What is the age of your plants?
27 days flowering

How long have they been in the soil mixture they are in now?
a month & a 1/2

How Tall are the plants?
2 1/2 feet

What PHASE (seedling, vegetative or flower) are the plants in?
Flower

What Technique are you using? (SOG, SCROG etc)
fimm, tied for support

What size pots are you using? (Include how many subjects to pot)
1 per pot 3gal

What substrate/medium are you using? What brand of soil mixture are you using?(percentage of perlite, vermiculite...etc?)
Fox Farms Ocean Forest
Cut at 20% perlite, 80% Soil

What Nutrient's are you using?
ff big bloom, ff tiger bloom, cal mag,

How much of each nutrient are you using with how much water? *Knowing the brand is very helpful*
3tsp bb, 2tsp tb, 1tsp cal mag per gallon

How often are you feeding?
I water about every 3 to 4 days, i have a meter so when the dry out.

If flowering, when did you switch over to using Bloom nutrients?
What order are you mixing your nutrients? (example: veg nutes 1st, bloom 2nd ect)
N/A

What is the TDS/EC/PPM of your nutrients used?
didn't measure it.

What is the pH of the "RUN-OFF"?
didn't flush yet

What method of pH test was administered? Using Strips? pH pen?
ph pen

When was your last feeding and how often are you feeding?
tonight, every 3-4 days

What size bulb are you using?
1000 & 600HPS

What is the distance to the canopy?
18" -20"

What is your RH Factor? (Relative Humidity)
45-50%

What is the canopy temperature?
78-86 F

What is the Day/Night Temp? (Include fluctuation range)
Nighttime is 78-86, daytime is about the same


Tell us about your ventilation, intake exhaust and when its running and not running ?
ac sealed room with CO2

Is the fan blowing directly at plants?
No,

Is the grow substrate constantly wet or moist?
wet

Is your water HARD or SOFT?
SOFT

What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water?
ro

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?
yes pest strips

Are plant's infected with pest's?
nope

 

[Row]

I cant say whether its heat or if this is causing the problem, but to me your Night time temps are to high.

Think about it, temps above 78 are only desirable in a co2 enriched environment and at night theres no co2 being added, or at least there shouldn't be.

So in my opinion the night time temps should never be above 75, when i first grew in a sealed room i had night temps of about 80-81, trying to have a very little day night swing but soon realized the plants didnt like it and i was wasting electricity heating the room to that high of a temp at night.

Row

 

[gio77]

Don't use FF, so not for sure where you are at ppm wise...? The twisting of the leaf is likely Zn, maybe Ca. Usually Zn brings about the twisting, but I just recognize it to mean I am missing micros. Also, the purpling of the stem & darkening of the leaves represents P deficiency. Probably the reason she is showing now, is that she is bigger & hungrier... the others are sure to follow. Seeing that you have a clear macro & micro def, then you likely just need to up the nute levels. Also, at every 4 days, they are definitely hungry... they've used up disproportionate amounts of nutes & need a rebalancing. In other words, feed more regularly. This latter point may actually address the deficiencies as well. Can't remember what you were using, but CalMag+ is a solid performer & it has the additional micro's added. Best.

 

[unitedgrooves]

Thanks guys.. I just flushed one of the plants using 2 gal of ro water @ near 0ppm.. And the runoff was 2000PPM @ .7

It seemed a bit high, so flushed again with another gallon (so total of 3 gal) and the PPm is 1600 to 1700.. So do you guys think these deficiency i'm having is do to nutes locking up do to salt build up. The only reason I say this is because I've been feeding them enough food I just think they are not taking it up.. Should I flush with more water or is that enough.. Again thanks ..

 

[Brother_Monk]

Hey bro. I've been running Bubba for a long time using them nutes. Currently running a 3x3 with 15 bubbas in Pro Mix. The pro mix already has the proper innoculants, so i don't use the Big Bloom. My feed schedule is once a week using about what you are using currently. I feed with veg nutes for the first three weeks before I switch over, and then a PK boost in week 4.

You are definitely over feeding. Feed once a week. I'm using 2gal batos and they need watering every 3-4 dayz like yours. So, feed every other watering. I usually feed on saturday so i don't get lost lol! Keep flushing and good luck! Bump up your Ph in flowering to 6.5-6.8 This recipe works very well for me using tap water. I don't usually have to add too much cal mag.

This one was vegged about three months. Bottom one was flowered in a beer cup double potted in a 1 liter square.

 

[unitedgrooves]

Hey bro. I've been running Bubba for a long time using them nutes. Currently running a 3x3 with 15 bubbas in Pro Mix. The pro mix already has the proper innoculants, so i don't use the Big Bloom. My feed schedule is once a week using about what you are using currently. I feed with veg nutes for the first three weeks before I switch over, and then a PK boost in week 4.

You are definitely over feeding. Feed once a week. I'm using 2gal batos and they need watering every 3-4 dayz like yours. So, feed every other watering. I usually feed on saturday so i don't get lost lol! Keep flushing and good luck! Bump up your Ph in flowering to 6.5-6.8 This recipe works very well for me using tap water. I don't usually have to add too much cal mag.

Thanks a lot Bro.. I'll look into that pro mix for the next run.. Ok i continued flushing and now the run off is about 1400PPM.. How much more do I need to flush?? Is that good enough?? And do I feed them nutes when they dry out or plain water?? PH is now bumped up to 6.6 so i should be good.. Since i have RO Cal mag is a must..

 

[unitedgrooves]

Damn, i didn't see those pics before.. Yeah bro your bubbas look super healthy, do you ever have fan leaves turn brown a fall off? 3 months veg damn, how much did that one yield & under how many watts?

 

[Brother_Monk]

Personally, if I needed to flush, I would do it until it came down to about 800ppm. Read the plants from there. I try not to let my nute solution be more than 1100ppm.

I have had lotsa strains lose fan leaves. Bubba drops her bottom ones when the light won't reach. Don't worry if ya lose a few. It's natural. They use them up as food when they no longer produce sugar. When more than a few start dropping, then you need to make changes. I think your flush should help them recover nicely. Just make sure you get a little runoff every time you water/feed so you can take a measurement. After they dry out, resume feed with a mild solution. If they respond well, go back to a healthy schedule. Good luck!

That big one was under a thowie and a six....just like yours. She gave me around 3 1/2 zips.

 

[unitedgrooves]

OK, i'll have to continue the flush tomorrow, as the lights went out already, hope it won't be a problem to continue.. Or should i just skip the one i did tonight and just move on to the next once and flush them to 800 ppm. I gotcha i'll hit them with a mild nute, how about around 600PPM, (full blast feed I use was at 1200) Since i use big bloom so its probably about right don't ya think? Damn 3.5 is nice yield, the last time i ran her in Hydro i only pulled under 2 (with a 600w) i'm hoping to get more this time, since i have 4 of them going.. They are around 30 days now, so you think they should be ok by harvest time?

 

[Perka]

http://www.amsterdammarijuanaseedba...eshootingsolutions/marijuana-plant-abuse.html

 

[Brother_Monk]

OK, i'll have to continue the flush tomorrow, as the lights went out already, hope it won't be a problem to continue.. Or should i just skip the one i did tonight and just move on to the next once and flush them to 800 ppm. I gotcha i'll hit them with a mild nute, how about around 600PPM, (full blast feed I use was at 1200) Since i use big bloom so its probably about right don't ya think? Damn 3.5 is nice yield, the last time i ran her in Hydro i only pulled under 2 (with a 600w) i'm hoping to get more this time, since i have 4 of them going.. They are around 30 days now, so you think they should be ok by harvest time?

The directions say 2-3tsp/gal(10-15ml./gal) for general feeding with TB. I find this is too much. I'm using anywhere from 5-7ml./gal. Every other watering. I water twice a week. Letting them dry out 4 days before their next drink at Ph 6.5ish. Tiger Bloom is some strong shit bro. Go easy with it and never trust the directions. Usually half of the recommended dosage is all you really need. Sometimes even less.

Flush on whatever time line works for you. If you have to resume tomorrow, then do so. Just get them down to a manageable level as soon as you can. Your yield may suffer a bit, but they should bounce back. Bubba is a relatively low yielder to begin with. I only vegged that one up for three months to see how much I could actually get. I find they do very well in a sog vegged for a few weeks. you just have to pack 'em in. Now, I run a small tray, vegged for 3 weeks. A nice compromise for me. About a zip and a half each.

 

[TheDude#1]

Hey guys,
And sorry to jump in on your thread unitedgrooves, but Row did you say you had probs when the day and night temps were to similar? What probs were you getting and what symptoms? Just i think i may have the same thing,
Cheers