Hello, have some trouble with these autos...

[Vexor1717]

Ok so I have 5 autos in 3 gallon pots, in canna coco coir(30% pearlite). Im feeding GH flora series at about 50% as well as ClaMag at 50%. Around 650 to 700ppm. I use purified or distilled water but I just bought a RO buddie that I'm hooking up tonight. For the 1st month or so these were under a 560w pull blurple box light. For the past few days they have been under HLG 600Rspec in a 5x5x6 tent 24/7. I feed daily to approx 20% runoff. Until last night they had a 395 cfm inline fan. I upgraded to 700cfm and I'm running it around 550 or 600.
These have looked kinda droopy and some new growth looks twisted and spindley. I think I may have had my light too low on them before possibly. Is that the most likely cause? A couple of these I've had problems from the beginning like looking overwatered but they re in coco. Thry always came back from it but still not sure because until recently the others looked great. Any advice welcome. Thanks! Any more info needed lmk plz.

 

[Mr.GreenthumbOG]

Keep the feeds low. Typical auto problems.
24hrs on stresses them bad, switch to 18.
my guess is your watering has been inconsistent. Too little. Then too much. Causing ph swings in the coco, causing uptake issues.
Do a ph slurry to confirm.
I would do a flush feeding on the next water.

 

[Vexor1717]

Keep the feeds low. Typical auto problems.
24hrs on stresses them bad, switch to 18.
my guess is your watering has been inconsistent. Too little. Then too much. Causing ph swings in the coco, causing uptake issues.
Do a ph slurry to confirm.
I would do a flush feeding on the next water.

I'll do a slurry test tomorrow but I checked the runoff and it's like .1 higher on the ph and 150 lower on the ppm. Just finished setting up my RO buddie so I can do a proper flush as well. My watering has been consistent though. Same time of day every day. Increasing volume as they take more. This is my 1st coco run and 4th all together but if I didn't learn anything before it was watering/feeding consistency. What ppm would you suggest or % to directions for photos? Thanks!

 

[Moshmen]

Keep the feeds low. Typical auto problems.
24hrs on stresses them bad, switch to 18.
my guess is your watering has been inconsistent. Too little. Then too much. Causing ph swings in the coco, causing uptake issues.
Do a ph slurry to confirm.
I would do a flush feeding on the next water.

I was a dedicated auto grower and have since found photos to to be more forgiving and better for us inexperienced growers, just my opinion

 

[boomgagem]

How far away is the hlg and is it 100%? That’s a huge change in light for sure. Do you have a light meter? If not download an app from your App Store.

 

[Vexor1717]

How far away is the hlg and is it 100%? That’s a huge change in light for sure. Do you have a light meter? If not download an app from your App Store.

It's about 24 inches off canopy now. Yes it's at 100%. No I don't have a light meter. What exactly am I looking for?

 

[boomgagem]

It's about 24 inches off canopy now. Yes it's at 100%. No I don't have a light meter. What exactly am I looking for?

You can download one from the App Store. The one I use is Kortana, the LED option is like 4 bucks but really worth it. Android has one too but I don’t know the name of it.

it explains how to use it, use a piece of copy paper over the front camera lens, I’d be shooting for 20-30k Lux at the canopy until they recover.

 

[Mr.GreenthumbOG]

Autoflowers at not for beginners. Not forgiving. Any stress affects yields greatly.

 

[Mr.GreenthumbOG]

If you flush, don’t push RO through the coco, without added nutrients.
I would plan on doing 500ppm waterings for the next 2 with 30% runoff, instead of a heavy flush.

 

[Vexor1717]

If you flush, don’t push RO through the coco, without added nutrients.
I would plan on doing 500ppm waterings for the next 2 with 30% runoff, instead of a heavy flush.

Why is this? Because it's coco?

 

[Vexor1717]

Keep the feeds low. Typical auto problems.
24hrs on stresses them bad, switch to 18.
my guess is your watering has been inconsistent. Too little. Then too much. Causing ph swings in the coco, causing uptake issues.
Do a ph slurry to confirm.
I would do a flush feeding on the next water.

Well it seems my PH meter went out on my and I didn't realize. Calibration solution and new meter came in today. Waiting to get off work to see my findings...

 

[Mostlymooses]

Straight RO through coco is a no go. At least put some cal mag through it with it.

 

[Mr.GreenthumbOG]

Why is this? Because it's coco?

It apparently messes with the buffering capability of the coco , I was suggesting a heavy runoff nutrient flush. 500ppm.

Well it seems my PH meter went out on my and I didn't realize. Calibration solution and new meter came in today. Waiting to get off work to see my findings...

Once you get the results, you can adjust the ph accordingly for your flush feeding.

 

[Mostlymooses]

Autoflowers at not for beginners. Not forgiving. Any stress affects yields greatly.

Also this is suuuper true. Auto flowers have gained a lot of popularity lately but really are not the easiest to grow for the inexperienced. Nothing wrong with spending some time on an easier to grow strain to really get your experience in different media.

You absolutely can overwater coco. Any soilless media has the capability to be overwatered :)

 

[Vexor1717]

It apparently messes with the buffering capability of the coco , I was suggesting a heavy runoff nutrient flush. 500ppm.



Once you get the results, you can adjust the ph accordingly for your flush feeding.

Well what I'm reading now tells me for a week or 2 they were getting 6.7 ph
to 7.0 Ph so should I drop it to like 5.5 or is that too much for them now?

 

[Aqua Man]

Way to much light for 24/7 at 2ft 100% way way to much... in addition to what was said above. I would drop to 18/6 under that intensity. Even that may be to much after looking it up at 100% you prob best off about 30" 18/6.

Under normal flower 24" @ 100% would be good and that 12/12 lighting. 24/7 you dam near double what most will handle. I'm surprised they look this good

 

[Vexor1717]

Way to much light for 24/7 at 2ft 100% way way to much... in addition to what was said above. I would drop to 18/6 under that intensity. Even that may be to much after looking it up at 100% you prob best off about 30" 18/6.

Under normal flower 24" @ 100% would be good and that 12/12 lighting. 24/7 you dam near double what most will handle. I'm surprised they look this good

Oh wow. Had no idea. Thanks!

 

[Vexor1717]

Way to much light for 24/7 at 2ft 100% way way to much... in addition to what was said above. I would drop to 18/6 under that intensity. Even that may be to much after looking it up at 100% you prob best off about 30" 18/6.

Under normal flower 24" @ 100% would be good and that 12/12 lighting. 24/7 you dam near double what most will handle. I'm surprised they look this good

The main reason I had them in 24 was because I was having temperature issues but its warming up now. Starting that tomorrow. Thanks again.

 

[Aqua Man]

The main reason I had them in 24 was because I was having temperature issues but its warming up now. Starting that tomorrow. Thanks again.

You can cut light intensity and stay 24/7 if you need the temps.

I would say for 24/7 you be good at 30-35k lux max.

Lux Meter (Light Meter) - Apps on Google Play

Professional light intensity (lux) meter for your android device.

play.google.com

 

[Vexor1717]

You can cut light intensity and stay 24/7 if you need the temps.

I would say for 24/7 you be good at 30-35k lux max.

Lux Meter (Light Meter) - Apps on Google Play

Professional light intensity (lux) meter for your android device.

play.google.com

Thanks man. Much help as always.