N def or necrosis plez help

[giglewigle]

just checked soil temp was 13 made some adjustmants got it 2 15 im 100 percent sure my problams are cused buy temps other day i forgot 2 turn on the exaused fan and turn of the seedling mat it got up to 45c but the plants seemed 2 be loving it im gunna try and keep it warm tomorro and see what happens

 

[MichiganMedGrower]

just checked soil temp was 13 made some adjustmants got it 2 15 im 100 percent sure my problams are cused buy temps other day i forgot 2 turn on the exaused fan and turn of the seedling mat it got up to 45c but the plants seemed 2 be loving it im gunna try and keep it warm tomorro and see what happens

If the room is cold but the roots are kept warm that works too.

They make heat mats and heat cables for greenhouses.

I have read here that one can be made from a regular heating blanket and some sheets of thin wood or paneling.

Not sure how I would feel about water danger on that but good thought on DIY.

 

[giglewigle]

If the room is cold but the roots are kept warm that works too.

They make heat mats and heat cables for greenhouses.

I have read here that one can be made from a regular heating blanket and some sheets of thin wood or paneling.

Not sure how I would feel about water danger on that but good thought on DIY.

im pretty crap at diy tbh i think i can controll the temps well enough just means checking on it more so know when it starts to raise and drop and what to do and when kinda glad its only from temps easy enought 2 controll

 

[Illies1982]

In the winter in Vermont. I have had my temp. lower then that quite a few times before I got a really nice setup. Like 10 years ago. That's not cold enough to hurt the plant. But your right on the edge with heat. Actually I have grown some really nice stuff with those temperature changes. I know its not ideal though, but it happens. It looks like your NPK ratio is off. Go with lower N high P. You have a P def. As far as I can see. Its just starting so you can get ahead of this. But I don't know all the details. Looks like Nitrogen is high in soil. I bet the tips will show burning in a week. But that can be fix with doing what I say. But I'm sure I will get some rude comments on my opinions, but all well.

 

[Illies1982]

If you get a dehumidifier that will help with colder night temps. Also will help with build the frost. MY2CENTS

 

[MichiganMedGrower]

In the winter in Vermont. I have had my temp. lower then that quite a few times before I got a really nice setup. Like 10 years ago. That's not cold enough to hurt the plant. But your right on the edge with heat. Actually I have grown some really nice stuff with those temperature changes. I know its not ideal though, but it happens. It looks like your NPK ratio is off. Go with lower N high P. You have a P def. As far as I can see. Its just starting so you can get ahead of this. But I don't know all the details. Looks like Nitrogen is high in soil. I bet the tips will show burning in a week. But that can be fix with doing what I say. But I'm sure I will get some rude comments on my opinions, but all well.

I had similar issues when I grew in my basement here the first winter.

Root zone got to almost 50 farenheight and that stops uptake and can stagnate the water in the pots and cause root rot.

There are many variables of course.

No rude comments here. What you are saying can be done.

 

[MichiganMedGrower]

If you get a dehumidifier that will help with colder night temps. Also will help with build the frost. MY2CENTS

That is the kind of variable I mean.

 

[Illies1982]

giggle be careful which bloom ferts you use. You do not need super high phosphorus either. Do so research on npk ratios on garden sites not just this one either. Like the almighty bloom booster lol. Those are mostly a crock of shit. Ive tried them there its a good way to ruin your crop.

 

[Illies1982]

Exactly those can be a very valuable asset to any grow room. Our states are very simaliar MichiganMedGrower

 

[Dr. Who]

Calcium is all most soil needs to loosen up.

Dolomite lime can cause = all sorts of problems in creating dense, or tight, clumpy soil and anaerobic conditions....
Dolo contains high Mg and if your building soils - Dolo should not be used as your "go to" liming agent!

Loosening of "tight" or clay type soils is best done with Garden Gypsum....You will get Ca from it though.

 

[ANC]

In the meantime, you can apply the lacking nutrients foliar.

 

[giglewigle]

If you get a dehumidifier that will help with colder night temps. Also will help with build the frost. MY2CENTS

100 percent agreed on the dehumidifiar and the frost with what u said about growing in the winter there the strain u grew was probably a different one to the strain im growing atm with diffarent tolerances but i aggre with what youve said man no rude comments from me every one whos commented on this thread are really cool people not sure how the dehumid can help with the cool temps i know low temps help frost but how can it help with cold temps ive been using for lack of a better word teas like powdered kelp a soil probiotic with kelp and fish and a composted chicken shit product thats been comprest and pelletized i did put a pinch of dolomigjt lime in a few days b4 syptoms 1st showed

 

[MichiganMedGrower]

That is why they sell agricultural lime commonly instead of dolomite despite the "trade name" @Dr. Who

It is a mix of dolomite and calcitic lime. Makes the ratio about 30% calcium to 3% magnesium.

Much closer to correct. And over liming is the problem not the products.

Your mis- information is growing as you post.

 

[giglewigle]

In the meantime, you can apply the lacking nutrients foliar.

im 4 weeks into flower if i can do it without getting any on the stigmas u rekon i should try it

 

[Johnei]

http://rollitup.org/t/humidity-and-nutrient-uptake.946062/#post-13694846

 

[Dr. Who]

This last leaf is bad, it is showing problems with access to metals like iron.
The second pic from the bottom is typical from magnesium deficiency/lockout.

The cascading effects from the Mag def., in relation to it's cause and the other minerals that are effected by low Mg conditions.

No one has asked this.

Just what are you feeding it?
Do you know the NPK value? OR What did you use to make the tea your using?
NPK of anything else your adding?
Are you adding?
What soil?
If you built the soil? - List the things you used to build it and how much of each.

At 4 weeks into bloom.....The P actually looks a bit high. I suspect a combination problem here. No single one thing.
BUT - Root zone temps must be addressed first.

 

[ANC]

I guess you can try and wait for the soil to catch up, but there is always a delay when you work with soil.

I wouldn't want anything to get on your flowers though. tried watering with slightly warm water?

Pro tip, lift your pots off the ground on some support, the ground is a massive heatsink.

 

[Illies1982]

dehumidifier will raise temp. Also it makes ideal growing conditions for flowering.

 

[Johnei]

Get a full plant picture for better diagnosis.

 

[ANC]

I find the air conditioner isn't too expensive to run when you put it into auto mode with a set temperature, It automatically runs, heat, cool or dry depending on the sensors. So you don't get that instant swamp effect as things heat up.