Plants are sick and I’m not sure what to do please help!!!!

[NewbieNachos]

Hey guys how are you?

I’ve got some small Autoflowers in a tent that have been having issues, I’ve tried raising the light and also changing over a lower wattage light to no avail. Heat and light stress have been ruled out as the tent remains around 20°c and I have put a shade cloth up to dim some of the light just in case it was that.

I’ve sprayed her with neem oil in case of russet mites but she seems to have just curled up more.

I’ve adjusted my ph meter and flushed them as well.

I’ve made sure I’m not over feeding nutrients either.
Pistils are also turning a dark brown color very early.

Really not sure what the problem is, any help would be greatly appreciated

 

[Bdubs]

It looks like heat stress. Possibly too much direct, consistent wind.

But pests or water logging can also cause the leaf edge curl, aside from the heat stress. Look at that lower leaf that’s blurred in the picture, at the lower part, second to last picture. It is glossy and leaf edges curling down. Root health, too wet of medium, no oxygen to roots/not allowed to dry back properly. That one may only be affected by that though as the others leafs look good.

Some yellowing going on. Have you considered that 68 is too cold, 20c as a high is actually low. 68 should be your night time rock bottom. 75 day time minimum. The leaf curling could be due to the leafs trying to block wind from the leaf surface or it’s just simply too cold and she is protecting the leaf.

Cold and dry, overwatered consistently wet soil. Plastic pots don’t breathe as easy. Allow nice dry back period between watering to give those roots some air. Consider the soil temps are too low. If they are sitting directly onto that tile floor in the tent, get them up off the floor if you can. Those tiles are chilly and the soil will try to match the temps of the tile. If your running cool temps, water a lot less often. Consider the cold floor plus if you’re watering with 67 degree from the tap. Soil is on chilly mode. Any stunted growth?
Lots of adjustments makes for hard diagnosis.

Just tossing out some brainstorming. Maybe more will piggyback or shine more speculative advice.

 

[NewbieNachos]

Thanks so much Bdubs

I have noticed the medium isn’t draining the best and staying wet, I’ll give them a good week to dry out and see if that helps

Issue with the temperature is I live in Thailand and it’s brutally hot, the tent is also in my bedroom. So I have the aircon running constantly and if it goes above 20°and the room swelters too much. I’ll try pumping it up to 23° during the day and lowering it at night and see if that helps.

I’ll try get the pots up off the ground, and see if that helps too.


And yeah they haven’t been growing too much since I ran into issues a couple weeks ago

 

[NewbieNachos]

I was thinking possibly wind stress too but since I’ve moved the fan higher and off them and installed a shade cloth (in case it was light related) they’ve still gotten worse.

I’ve now got them up off the ground and made the room slightly warmer.

Is there any way to dry the medium out faster, like placing outside for a few hours? Or is it best to just wait?

 

[cannafarmer420]

Did you spray with lights on?

 

[NewbieNachos]

Did you spray with lights on?

Hey man, they were under the light for a couple hours but it was turned down real low, I sprayed them multiple times now and once with a splash of dish soap added in (I read online that it helps the neem oil stick). After that spray though they looked a little worse for ware so I stopped adding the dish soap and just used straight diluted neem and let them dry in the dark. They got sprayed again today and dried in the dark as well

 

[LoveGrowingIt]

Is there any way to dry the medium out faster, like placing outside for a few hours? Or is it best to just wait?

They look like they're stretching, so I don't think the problem is light stress.

Low humidity can show as problems at the leaf tips. What is the temperature and humidity inside the tent?

They also look like they need nutrients. What are you feeding them?

 

[Bdubs]

If you have access to something similar to Reflectix or any bubble insulation would work, to wrap around the pots. Would help keep the soil warmer also.

You could also buy the ACInfinity tent heater. Considering you have low temp issues that would be amazing for an automated temp with one device.
You can mitigate low humidity with lighter nutrients and feeding every watering, watering more often. But them temps coming up will help her thrive for you.

 

[NewbieNachos]

They look like they're stretching, so I don't think the problem is light stress.

Low humidity can show as problems at the leaf tips. What is the temperature and humidity inside the tent?

They also look like they need nutrients. What are you feeding them?

They haven’t stretched too bad to be honest. Not from what I’ve noticed, it’s been slow and steady growth, and a couple were runts.

I don’t actually have a thermometer so I can’t actually read it, but my aircon is always on 16-18° so I was estimating the temp to be around 20° C in the tent. I will order something to gauge it properly tomorrow.

I’ve been feeding them some cheap nutrients off Lazada (Thai eBay) as weed is legal here now nutrients are quite cheap and easy to get. But lately I’ve been thinking they might not be the best so I’ve switched to Aptus Pro, but have only watered once with that so far. The medium is very wet and cold though so I don’t want to feed them again until they dry out.

 

[NewbieNachos]

If you have access to something similar to Reflectix or any bubble insulation would work, to wrap around the pots. Would help keep the soil warmer also.

You could also buy the ACInfinity tent heater. Considering you have low temp issues that would be amazing for an automated temp with one device.
You can mitigate low humidity with lighter nutrients and feeding every watering, watering more often. But them temps coming up will help her thrive for you.

That seems like a good idea with the tent heater, I’ll have a look into one. Do you reckon low humidity would also be a cause for this as the air con is running constantly so I can imagine the environment is quite dry. I have a pot of water in there to help increase humidity

 

[LoveGrowingIt]

I don’t actually have a thermometer so I can’t actually read it, but my aircon is always on 16-18° so I was estimating the temp to be around 20° C in the tent. I will order something to gauge it properly tomorrow.

20° C (68º F) is somewhat cold. 26° C would be better. Also, young plants like humidity near 70%, but air conditioners tend to set the RH to 50% or lower. So, yes, get a thermometer and hygrometer. The information will be helpful.

I don't know anything about the nutrients you're using, but the plants look like they could use more nitrogen.

 

[NewbieNachos]

20° C (68º F) is somewhat cold. 26° C would be better. Also, young plants like humidity near 70%, but air conditioners tend to set the RH to 50% or lower. So, yes, get a thermometer and hygrometer. The information will be helpful.

I don't know anything about the nutrients you're using, but the plants look like they could use more nitrogen.

I’ll look into it, thank you my bro

 

[Bdubs]

Well, AC doesn’t remove humidity. It conditions the air temps. But typically in an air conditioned environment, 50-55 humidity is the average. So if you don’t know, you are probably stagnant in that range. When you increase temps, you’ll be able to water more often. The temps will evaporate the water in the soil and from the plant sweating will naturally swing the humidity levels up inside. You would probably stay 50 at night and 60 day low/high targets, without intermission or a humidifier. So if you can’t or don’t want to buy an ACinfinity humidifier to total control it, it’s fine, just stay light on nutrients and feed her every watering. Water them slow as you have patience until first sign of runout. Dont do full runout feeding.

 

[NewbieNachos]

I should also add I did this grow in small pots as I’ve got limited space and wanted little small pocket rockets that would only produce a half to a full ounce a plant.

I’ve grown plants before very successfully using larger pots and have never run into an issue of this kind. Might be something to do with the small pots too

I was watering twice a week with nutrients and flushing once a week with fresh water (like I used to with previous grows) which now I think about it was way too much. I’m thinking of just watering once a week now after letting the soil dry out

 

[NewbieNachos]

Well, AC doesn’t remove humidity. It conditions the air temps. But typically in an air conditioned environment, 50-55 humidity is the average. So if you don’t know, you are probably stagnant in that range. When you increase temps, you’ll be able to water more often. The temps will evaporate the water in the soil and from the plant sweating will naturally swing the humidity levels up inside. You would probably stay 50 at night and 60 day low/high targets, without intermission or a humidifier. So if you can’t or don’t want to buy an ACinfinity humidifier to total control it, it’s fine, just stay light on nutrients and feed her every watering. Water them slow as you have patience until first sign of runout. Dont do full runout feeding.

Sweet as my bro! Thanks so much for the information, this has helped a lot and I really hope it fixes everything

 

[HerbalEdu]

pots are rather small for plant that size ...

 

[NewbieNachos]

pots are rather small for plant that size ...

The idea was to keep them small, I wanted little pocket rockets. I explained more above

 

[LoveGrowingIt]

Well, AC doesn’t remove humidity.

Oh, yes, they do. That's why they're called air conditioners.

 

[Bdubs]

It is an auto, if it root binds first before she flips, she will flip herself for him. Right?

 

[Putthataway]

Well, AC doesn’t remove humidity. It conditions the air temps. But typically in an air conditioned environment, 50-55 humidity is the average. So if you don’t know, you are probably stagnant in that range. When you increase temps, you’ll be able to water more often. The temps will evaporate the water in the soil and from the plant sweating will naturally swing the humidity levels up inside. You would probably stay 50 at night and 60 day low/high targets, without intermission or a humidifier. So if you can’t or don’t want to buy an ACinfinity humidifier to total control it, it’s fine, just stay light on nutrients and feed her every watering. Water them slow as you have patience until first sign of runout. Dont do full runout feeding.

Ac does remove humidity. They are equipped with a dryer that should be replaced when opening up the system.