Thoughts on what could be causing this?

[Dipped Beef]

does anyone have any suggestions on this? Previously I had an issue on Cal/Mag deficiency and that my pH was at 6.2 so it was too low. However the leaves have since turned more green which I believe is a good sign however, the tips on the new leaves are curling a little bit and some of the older leaves have brown tips. A side question is, is it too early for them to starts showing hairs? Seeds went into a damp paper towel 5/04/2020.

Any help is greatly appreciated!

-Strain: Jack Herer Autoflower
-Soil: Fox Farm Ocean Forest.
-Nutrients: Fox Farm Trio (just using Big Bloom currently) and Cal/Mag.
I’m just using pH water and Cal/Mag. I measured the pH without the cal/Mag to 6.5 then added the cal/mag. I’ve s
-pH: 6.5
-Water: purified
-Light Spider Farms SF2000
-Temp:72-85
one thing I notice is in the morning before I open up the tent the temp can sometimes get to 88. I open the tent and fill the humidifier and it will drop to 78 and will be good for the day between 74-79
-Humidity:46-77%

 

[Dipped Beef]

Would it be good to try and turn the light down and try and not water for a day or so to see if that eliminates the possibilities of overheating from the light and overwatering?

 

[manfredo]

"I’m just using pH water and Cal/Mag. I measured the pH without the cal/Mag to 6.5 then added the cal/mag. "


I'm not sure what the issue is and I'm not familiar with auto's, however if you are going to adjust the PH it should be done after you add the calmag and /or any other nutrients, not before.

 

[Nefrella]

does anyone have any suggestions on this? Previously I had an issue on Cal/Mag deficiency and that my pH was at 6.2 so it was too low. However the leaves have since turned more green which I believe is a good sign however, the tips on the new leaves are curling a little bit and some of the older leaves have brown tips. A side question is, is it too early for them to starts showing hairs? Seeds went into a damp paper towel 5/04/2020.

Any help is greatly appreciated!

-Strain: Jack Herer Autoflower
-Soil: Fox Farm Ocean Forest.
-Nutrients: Fox Farm Trio (just using Big Bloom currently) and Cal/Mag.
I’m just using pH water and Cal/Mag. I measured the pH without the cal/Mag to 6.5 then added the cal/mag. I’ve s
-pH: 6.5
-Water: purified
-Light Spider Farms SF2000
-Temp:72-85
one thing I notice is in the morning before I open up the tent the temp can sometimes get to 88. I open the tent and fill the humidifier and it will drop to 78 and will be good for the day between 74-79
-Humidity:46-77%

Do you have any type of exhaust or are you just using passive intake/exhaust?

Looks like you had nutrient burn. I burned up one of my plants pretty well by using the "recommended amount" from fox farms (i use the same soil/nutes). Decided to cut back to a once a week feed at 50% strength and go from there.

As to the flowering, it's right in that time frame. Typically most will start to show flowering signs after 4/5 weeks. If they haven't yet, they may just be a little slow.

 

[Dipped Beef]

"I’m just using pH water and Cal/Mag. I measured the pH without the cal/Mag to 6.5 then added the cal/mag. "


I'm not sure what the issue is and I'm not familiar with auto's, however if you are going to adjust the PH it should be done after you add the calmag and /or any other nutrients, not before.

Should I be adding Cal/Mag every feeding? I’m watering every other day.

 

[Dipped Beef]

Do you have any type of exhaust or are you just using passive intake/exhaust?

Looks like you had nutrient burn. I burned up one of my plants pretty well by using the "recommended amount" from fox farms (i use the same soil/nutes). Decided to cut back to a once a week feed at 50% strength and go from there.

As to the flowering, it's right in that time frame. Typically most will start to show flowering signs after 4/5 weeks. If they haven't yet, they may just be a little slow.

I have a fan blowing into the tent and no exhaust fan. I’m currently only using pH water and cal/mag in the water.

 

[manfredo]

Should I be adding Cal/Mag every feeding? I’m watering every other day.

I do, and it's a good idea to calibrate your ph pen occasionally.

 

[Nefrella]

I have a fan blowing into the tent and no exhaust fan. I’m currently only using pH water and cal/mag in the water.

See about getting an inline fan, that will help control the temps. Exhaust it outside if you can (best course of action) but if you cannot vent outside, you'll need to control the ambient temps of the room more closely.

Even with just using ph'd + CalMag in the water, you'll need to adjust the strength of the mixture, or frequency. Some things I've learned over the last year (I'm relatively new to this myself) is that just because there are nutrients available to feed it, shoving extra food in the plants mouth doesn't always necessarily help. Honestly, I feed mine once a week with any nutes/CalMag, the rest of the days, regular ph'd water. If you're feeding them with each feed with CalMag, that can cause issues. Too much food = burn.

Definitely work on the air exchange, it's important.

Will your plants survive? Likely, but it's about dialing the process in to get quality, over quantity, In my opinion.

 

[CannaCountry]

water + calmag, then pH to your liking. If you were doing this in a different order, I'd get things straight and give them time to adjust. You may have them very much out of whack pH wise.

I'm hoping your humidity reading is a fluke, otherwise, you'll need to address the low and high...that one's going to cause you issues at some point.

See what happens once you get your pH sorted. Good luck.