Need help, 2 weeks into flowering problems

[teddybud]

First thanks for taking a gander at my thread, my baby is just getting worse and worse every day. I'll start this off with all the info.
Heres the setup
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Lighting : 400w HPS



Vent : 250cfm exhaust, plus a osc fan to move air
Temps : flux from 75 lights off, from 85-98 lights on depending on outside temps getting a aircooled hood this week to hopefully drop the temps some.
Soil : Miracle Grow Organic (.1 - . 5 - . 5 )
soil ph : 6.8
Nuits : Fox Farm Grow Big (veg) Fox Farm Big Bloom (flow)

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anyways now to the problems... this just started up like 6 days ago.. but has gotten much worse.. here is what its at right now... not quite sure whats goin on... i figured since I'm at my wits end I'd let some more experienced people have a gander... so here are the problem pictures.
















i was thinking a cal def.. but I dunno whatcha think?

 

[sproutco]

From the color of your leaves, I would say you are overfeeding the plants. Soil ph should be closer to 6 not 6.8 Plants don't function really well over 86 degrees. Calcium disorder would show up on newer growth not old. Have you used straight water lately? Sometimes salts build up in the soil so this is good to do every once in a while. You should be adjusting your fert water after mixing. This will help with the higher ph you have: http://www.icmag.com/ic/showthread.php?t=31294&highlight=sulfuric+acid Here is the way to test soil ph: http://www.icmag.com/ic/showthread.php?t=32760 I don't know about your ferts/whats in them. Along with n p k and micronutrients, they should also contain calcium, magnesium, and sulfur. If you need calcium, you can add 1/4 teaspoon powdered gypsum per gallon of water with the regular ferts. If you need magnesium, you can add 1/4 teaspoon epsom salts along with the regular ferts. Using either also provides sulfur. Sometimes with dolomite lime in the soil, it is still good to add these every third or fourth fert. because levels of cal/mag often run low.

 

[teddybud]

well I'll try watering just with plant water then... yea its quite hot were I reside so heats a big problem... can't do all that much to get rid of it.

 

[teddybud]

I think i need to repot this plant... roots are starting to come out of the bottom on the pot... which is what led to some horrible nuit burn earlier on... I'll throw up some pictures in a second.

 

[teddybud]

those are the lastest shots of the sickness.

 

[sproutco]

I guess you are using the big bloom now that they are in flower. I checked their website and it does not get specific about ingredients. Does your bottle give a gauranteed analysis like nitrogen .1% , iron .001%, etc... You should check to see if it contains: nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, manganese, zinc, copper, boron, and molybdenum. If your miracle grow soil had lime in it to raise ph and provide cal/mag, it is probably starting to run out so you add calcium and magnesium in the water.

Like I said before, the leaves are abnormally green from too much fert.

You need to test the soil ph and find what is going on. Use the link I gave before to figure out how to do that. Also, you should be adjusting the ph of the fert water after mixing with an acid or base. I also gave you a link for that.

 

[teddybud]

soil is 6.8 lemme check on the props of the nuits.

nuits
.002 ammoniacal Nitrogen
.001 nitrate nitrogen
.005 Water soluble organic nitrogen
.002 water insoluble organic Nitrogen
.3 avaible phosoric acid
.7 soluble potash

 

[sproutco]

It does not list calcium, magnesium, sulfur, iron, manganese, zinc, copper, boron, and molybdenum? Ph is too high. Should be around 6.

 

[teddybud]

newp doesn't list any of those.. I'm starting to thing this nuit isn't enough...

ok so on the ph lowering I should just use the acid method.. mm I guess imma go and try and get that issue solved..

 

[sproutco]

That fert may be enough. It has more ingredients in there but it does not list them. That makes it hard to know what to add. When you repot, you should probably add some dolomite lime into the soil if it is not in there already. That way you will know that the plants are getting calcium and magnesium.

 

[teddybud]

will do man

 

[MynameStitch]

your soil ph is fine, i can see why sprout has stated it looks like your overfeeding, because of the dark green look, but you have a nitrogen deficiency going, the plant has a natrually dark green look to it. the leaves would also show some other type of stress not just the dark green

i would give it some nitrogen

you using the bloom fert now? how often was you feeding before this problem started? and how much?

 

[teddybud]

Yea I'm using the bloom, 4tbs per gallon, and I was feeding once the soil was dry about 6 cm down.

 

[Growdoc]

This is light over feeding but the real problem is air temps...

if you can leave the door open when the light is on this will help, or redo your vents making more in holes.

also you might wanna switch your cycle so the light is off in the day time and on at night...

dont feed CA and MG at the same time!!!

Growdoc

 

[teddybud]

would a enclosed hood help at all..? cause its vented as best I can do... all i could do is get a higher cfm fan..

 

[sproutco]

I'm using the bloom, 4tbs per gallon

Is this the amount they suggest to use on the package? On their website, they say to use 2 teaspoons tigerbloom + 1 tablespoon big bloom per gallon of water during flowering. Big bloom by itself they suggest 2 tablespoons per gallon of water. I think I would try 1/2 of what you are using now. Here is the feeding schedule. Look at soil systems: http://foxfarmfertilizer.com/feedingfox.html

 

[teddybud]

Is this the amount they suggest to use on the package? On their website, they say to use 2 teaspoons tigerbloom + 1 tablespoon big bloom per gallon of water during flowering. Big bloom by itself they suggest 2 tablespoons per gallon of water. I think I would try 1/2 of what you are using now. Here is the feeding schedule. Look at soil systems: http://foxfarmfertilizer.com/feedingfox.html

nope thats foliar feeding... normal watering 4 tbs at least on my bottle.

 

[froth]

teddybud... I use tiger bloom and big bloom from fox farm but I have not been using anywhere near what they recommend on their bottles. Even their own specialized feeding schedule that details the amounts of their fertilizers to be used and when to use them in the grow schedule doesn't even suggest using 4 tablespoons per gallon. That amount is probably more suitable for huge tomato plants outside or any non marijuana plant.

I've been using .5 to 1 teaspoon per gallon of the tiger bloom (2-8-4) and 2 to 3 teaspoons of big bloom per gallon... THis is approximately a little less than half the recommended amount on their feeding schedule.

I'm not sure why the company's indications change from one place to another but I think you might be putting too much of the big bloom in their for just that one plant..

Also I think the big bloom is supposed to be a more all around kind of nutrient suitable for the plant entire life from vegging through flowering. Hence why the levels of the nutrients are so minimal

If you can get your ph issues under control and do what these other more experienced guys are telling you, then I suggest getting a fertilizer with a bit more Phosphorous like the Tiger Bloom for example..but their are many others as well

 

[teddybud]

hmm well i think i'm gonna get some tigerbloom along with a cooltube or enclosed hood not sure which yet... and maybe a cheap little swamp ac unit to try and drop the temp a little more...

 

[ethereal]

cooltube or aircooled hood. (aka a/c hood)