This is an organic soil/peat moss/perlite mix under an 240w LED and cfl's for supplemental (side) lighting. The led is 15"s from the tops and I'm sure lighting is not causing this. Max temp in the room was 91 yesterday, and a low of 78 throughout lights out time. Humidity is 39% lights on and mid 50's lights out. This grow is in a cab that is roughly 2'x2'x3' and seems cozy. I have a 4" fan running 24hrs and my exhaust is on the timer. I switched over to GH maxibloom a wekk ago and have been hitting them hard with it. I was going 2 feeds to 1 one water, but have switched it to the opposite now. My ph is going in at 6.3 (+/-.01) with the MB and I'm not sure what it is coming out. PH with water is 7.1 and I'll adjust a gallon later to lower it (baking soda). All plants are 23 days old and this NL is by far the worst looking, but they all show signs of this. All plants have tons of pistols and the led is really penetrating for undergrowth, but they will die if I do not correct my issue. Tips are dry and crunchy on the plant pictured. Should I just PH water until they come back, dump the maxibloom and switch back to AN, or just cut way back on feedings? Maxibloom is being mixed 1tsp. per gallon of distilled RO water.
Nute burn or what?????
- Thread starter dkmf1
- Start date
91 is pretty hot,I would lower that to no more than 85 at the most. Looks like you have a bad case of nute burn.Flush and hold back on nutes for a week ot two.
Will do Namvet25. Just ph'd my water and found baking soda will increase ph,,,thought it was the opposite? Backed it down with vinegar to 6.4 and will start the flushing tonight. I also lowered the temp of my room heater to 65 which will bring the temp down dramatically, also cracked the window to speed the cooldown up. I cannot add rep nv, but I've tried many times to give it too you! Thanks for the advice you've given me thoughout my time here 
It's just a guess but from what I can see she looks like she's got a mag def, from the colour of her leafs, j gave them some espom salts at day 21. And also, I learnt this way if you are in organic soil do not use anything to pH your water, let the soil Buffett it out. I did this a fucked the micros in the soil, remeber it is a living soil.I flushed then transplanted into bigger parts. Stopped using the the pH- and baking soda, although I do feel I stunted them, but now then a very happy.
Has your soil got enough nutes for like 4 weeks?
And yeah she got nute burn, but flush the bitch hard. And she will be fine.
As iv learnt it called weed for a reason
EDIT, My water is pH 7.2 when I water my soil my pH run of its normal 6.5-6.6. Without pH adjustments.
Has your soil got enough nutes for like 4 weeks?
And yeah she got nute burn, but flush the bitch hard. And she will be fine.
As iv learnt it called weed for a reason
EDIT, My water is pH 7.2 when I water my soil my pH run of its normal 6.5-6.6. Without pH adjustments.
Muddy
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Looks more like nutrient lockout to me. While your pH going in is good, you really need to test your run off. I'm betting it will be way off compared to what it is going in.
P
psykadelix
Guest
Looks like you burned them. Humidity/ temperature too high- my guess is too much food. try flushing and waiting a couple days to see if that helps.
M
Mr Piggy
Guest
39% is not too high of humidity, it's too low. should be about 65% for vege. Once a plant goes over 85 degrees, especially with that low of humidity, the stomata on their leaves snap shut and they cease normal respiration. If you can, wrestle your temps back down to 75-80. Even 85 is a bit too high.
Also, leave all of your fans on at all times. plants need circulation and extraction both. They breathe just like every other living thing.
Sounds like you burnt your plants for sure, I'm assuming you're not going by the company recommendations? It's a good idea to feed once a week/every other watering (whichever fits closest to once a week) starting at 1/4 strength and slowly working your way up.
I have to agree with muddy that it looks like you have a lockout issue, possibly ph related. It could also be from salt buildup in your soil. While you have told us what ph your nute solution is going in at you haven't mentioned your runoff. The difference between the two is your medium's ph, and that's what really matters.
One last thing, don't add both ph up and down (baking soda and vinegar) to your solution. They battle it out in the solution and medium and can fluctuate and stress the plant. If you go too far in one direction, throw out the solution and start over. I'm also fairly certain that baking soda and vinegar react to form new substances, not something I'd want in my soil.
Just my
, good luck and harvest heavy
Also, leave all of your fans on at all times. plants need circulation and extraction both. They breathe just like every other living thing.
Sounds like you burnt your plants for sure, I'm assuming you're not going by the company recommendations? It's a good idea to feed once a week/every other watering (whichever fits closest to once a week) starting at 1/4 strength and slowly working your way up.
I have to agree with muddy that it looks like you have a lockout issue, possibly ph related. It could also be from salt buildup in your soil. While you have told us what ph your nute solution is going in at you haven't mentioned your runoff. The difference between the two is your medium's ph, and that's what really matters.
One last thing, don't add both ph up and down (baking soda and vinegar) to your solution. They battle it out in the solution and medium and can fluctuate and stress the plant. If you go too far in one direction, throw out the solution and start over. I'm also fairly certain that baking soda and vinegar react to form new substances, not something I'd want in my soil.
Just my
, good luck and harvest heavy
GoAuto6
Galactic Travler
Rough Calculation Guide:
Here's some good info on ph.....
If your runoff pH is higher than your starting pH, use this equation to determine your soil pH:*
Soil pH = Runoff pH + Difference
If your runoff pH is lower than your starting pH, us this equation:
Soil pH = Runoff pH - Difference.
For example, say your the starting pH of your solution before it goes in is 6.5 and the pH of your runoff is 7.0. The difference is +0.5, so using the above equation:
Soil pH = 7.0 + 0.5*
Soil pH = 7.5
If your starting pH is 6.5 and your runoff is 6.0, your difference is -0.5 and using the above equation:
Soil pH = 6.0 - 0.5
Soil pH = 5.5
If your runoff pH is higher than your starting pH, use this equation to determine your soil pH:*
Soil pH = Runoff pH + Difference
If your runoff pH is lower than your starting pH, us this equation:
Soil pH = Runoff pH - Difference.
For example, say your the starting pH of your solution before it goes in is 6.5 and the pH of your runoff is 7.0. The difference is +0.5, so using the above equation:
Soil pH = 7.0 + 0.5*
Soil pH = 7.5
If your starting pH is 6.5 and your runoff is 6.0, your difference is -0.5 and using the above equation:
Soil pH = 6.0 - 0.5
Soil pH = 5.5
5.3 run-off, so it is way out of wack. What is the best way to correct that? Just use the straight RO water that has a ph of 7.3 , as suggested above? Gains me my 1.0 back. Exhaust fans are now running 24/7. Plants are still growing, just look like do-do. High temp for the day was 84 and humidity was 42%. It's my first time growing in this cab, firs time with led, first time with air pots,,,,,,basically first time for almost everything! When they are burnt this bad, can they come back and actually yield anything or is it best to just start over and do it as it is supposed to be done. TOTAL F-N NEWBIE!!!!!! Should have learned from my last attempt in the pc.
M
Mr Piggy
Guest
If they are autos I'd just start over. Actually, I'd just flat out start over. That's just my personal opinion though.
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