What's going on with these plants?
- Thread starter Hempowering
- Start date
oilmaker68
Well-Known Member
If they started flat then curled up (canoed/tacked) then it's heat stress. They are simply too warm. I noticed some light green patches between the veins on your leaves too. That could be a heat bleaching thing or a nitro defficiency. Hard to say.
Hoe close is your light and what type is it. Are you feeding them?
Hempowering
Member
Here are more details, it is a 400 watt HPS in a cooltube dimmed to 275 watts due to intense summer heat, like right around 20" away.
It's around three weeks old and I fed it 1ml of biobizz grow a few days ago. Temperatures hit 89 degrees F during mid-day.
Thanks for the reply! It's my first time doing this
Last edited:
J0hnnY♣Ch1mp0
Active Member
I agree it appears to be heat stress and by your previous post with it hitting 89 that is more than likely the case. What is your humidity at right now? You want it to be at least at 50% other wise your plant will drink and use up water and nutes far too fast and dry out. Try to get your temps down as well.
Pass it Around
Well-Known Member
Heat stress imo, I would do anything you can to bring the temps down during the day.
For instance, freeze a milk gallon full of water and put a fan on it to blow into your intake or inside your room. Yeah it will only help for a short time but the temperatures will destroy everything good about the plant. I had Chernobyls going and they were so dank smelling your mouth would water. After the damn summer temps hit up to 100 I almost lost the whole crop and now it smells okay but nowhere near as good as it did. Made me sad...
For instance, freeze a milk gallon full of water and put a fan on it to blow into your intake or inside your room. Yeah it will only help for a short time but the temperatures will destroy everything good about the plant. I had Chernobyls going and they were so dank smelling your mouth would water. After the damn summer temps hit up to 100 I almost lost the whole crop and now it smells okay but nowhere near as good as it did. Made me sad...
Hempowering
Member
The room temperature here is 84 degrees F, and 89 degrees F inside the tent during mid day.
I don't own an A/C, so cooling the air by any other means than circulation is not an option for me. I'll try putting a bunch of those plastic ice packs inside and see if maybe that will lower the temp at least by a little bit. It's worth a shot. Thanks for the input!
Hempowering
Member
The humidity stays pretty steadily at 48%-50%. Lowest it has gotten is 42%, and the highest 55%. Thank you for taking a look
J0hnnY♣Ch1mp0
Active Member
What sort of air extraction do you have and where are you venting your hot air to?The humidity stays pretty steadily at 48%-50%. Lowest it has gotten is 42%, and the highest 55%. Thank you for taking a look
Hempowering
Member
S&P TD-350/125 Silent venting out of my only window, it's like a one room/studio apartment.
Pass it Around
Well-Known Member
make sure the ice packs are in front of a fan so the cold spreads
Hempowering
Member
I also have an oscillating fan to circulate the air inside, I'll put them in front of that one.
J0hnnY♣Ch1mp0
Active Member
Found your heat problem.
You need a squirrel cage fan with at least 400cfm for that hps.
oilmaker68
Well-Known Member
When your plant is too hot it stops photosynthesis which is bad. I know some one who ran ducting from his refrigerator/freezer to keep air cool in his tent.
Ice packs in front of your fan will help.
Ice packs in front of your fan will help.
Hempowering
Member
I am ready to try this as soon as it starts getting too hot today. Thanks!
Hempowering
Member
Well, the one I have now already changes the air like 5x per minute. I think the temp of the apartment is the issue, as the temp in the grow is only ever 2 degrees higher than the room temp. I will try the trick with ice packs in front of the fan and hope that helps a bit. Thanks so much for the input, since I'm totally new I appreciate it so much having experienced people sharing their knowledge.
oilmaker68
Well-Known Member
you're welcome bro......we're all learning with every grow..
Hempowering
Member
oilmaker68
Well-Known Member
oilmaker68
Well-Known Member
You cold I suppose but it's my understanding that it drys the air out. I may be wrong.
Would also be limited by quantity and price for what you'd need?
Would also be limited by quantity and price for what you'd need?
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