Old Strains - New LED Light!

[Fenderbender]

Looking good
I wish I had your humidity... I'm in Northern Europe but for some reason my place got the humidity of Kandahar.
If I run my exhaust RH drops to 25%, great for flowering though.
I usually don't care about it as it's just a couple of weeks before my main concern is removing humidity from the tent.
But Delps is probably right it's quite brutal.. but well this whole rock is a pretty brutal survival simulator.

 

[Chuckeye]

Looking good
I wish I had your humidity... I'm in Northern Europe but for some reason my place got the humidity of Kandahar.
If I run my exhaust RH drops to 25%, great for flowering though.
I usually don't care about it as it's just a couple of weeks before my main concern is removing humidity from the tent.
But Delps is probably right it's quite brutal.. but well this whole rock is a pretty brutal survival simulator.

Yeah, 25% is a bit low

I plugged my humidifier into the timer and half way through "night" the temp is 71.6 and rh is 61%.

Once I transplant into their final pots it should be easier to maintain rh and I can move on the measuring other stuff

Cheers

 

[Chuckeye]

Day 16, one hour of lights on after three days of 400par

After ten hours.....

Little bit concerned about the Acapulco Gold, seems to be very sensitive to water ?

Lights off temp 71.4 and rh 65%.....

And ready for the upcoming transplant

Light is at 20 inches, 360 par in the middle. 300 par on the outsides.

Gave that a nudge, will measure again when lights come on

Not in image > two 2 1/2 gallon fabric pots with 4 parts coco, 1 part perlite.

Also dumped out the ProMix HP from one pail and replaced it with 5 parts coco, 1 part perlite and about an inch of pure coco on the top ! Might do another one

Cheers

 

[Jon]

Those look great @Chuckeye! You said something about the leaves being a bit droopy? I don’t know if I’d say that just yet. In my experience it’s hard to tell until they hit their final pot. Also, is it maybe possible that using semi clear containers for starter pots might be allowing light to the root zone and maybe that’s why? I don’t know. But they look healthy and green and they look shortish and indica-ish with super tight nodes. But they look awesome to me. Good strains too.

 

[Jon]

Those look great @Chuckeye! You said something about the leaves being a bit droopy? I don’t know if I’d say that just yet. In my experience it’s hard to tell until they hit their final pot. Also, is it maybe possible that using semi clear containers for starter pots might be allowing light to the root zone and maybe that’s why? I don’t know. But they look healthy and green and they look shortish and indica-ish with super tight nodes. But they look awesome to me. Good strains too.

I looked again. Not semi clear. My bad I was moving too fast. Those are like sour cream buckets. I use them too. Sorry dumb me.

 

[Chuckeye]

Those look great @Chuckeye! You said something about the leaves being a bit droopy? I don’t know if I’d say that just yet. In my experience it’s hard to tell until they hit their final pot. But they look healthy and green and they look shortish and indica-ish with super tight nodes. But they look awesome to me. Good strains too.

Thanks @Jon !

But they are Sativa's

This is the Acapulco Gold I am concerned with. Just not quite embracing her situation

But, color is good, she's keeping up with her sisters in growth/size and feeding.

I was always a little leary of getting my HID light close enough to get these results

I looked again. Not semi clear. My bad I was moving too fast. Those are like sour cream buckets. I use them too. Sorry dumb me.

Please, all thoughts are Welcome here !

Cheers

 

[Chuckeye]

Day 17

Still working on balancing temp and rh....

I think I have been focused too much on reflective light, ie., my enclosure panels.

After all it is the light hitting the canopy that is important. And then temp and rh.

My "room" is usually 4 degrees cooler and the rh is usually 8 to 10 degrees higher.

I've moved my panels back to allow more air exchange between the two spaces.

Kinda like door open on a tent

At 30,000 lux/ 450 par and a couple of hours since the adjustment temp is 82.5 and rh is 55 % at plant height.

About 1.5 VPD.

Let's see where it settles, eh ?

Some transplant thoughts courtesy of Lambs Bread

I normally charge my medium a day before transplant by watering from the top with a gallon of 2g of MC.

My thinking is ProMix HP and or coco will only hold so much moisture in SIP's or fabric bags.

Precharge a day before transplant and your medium will be at the perfect moisture content....

Pot/strain selection has been made, time to precharge tomorrow

Cheers

 

[Chuckeye]

And six hours later temp is 79.5, rh is 58%. VPD of 1.2

Still not seeing the praying I'm used to ?

BUT, the plants are quite a big Larger than under HID

A day older under HID...

Cheers

 

[Melville Hobbes]

Thanks @Jon !

But they are Sativa's

This is the Acapulco Gold I am concerned with. Just not quite embracing her situation

But, color is good, she's keeping up with her sisters in growth/size and feeding.

I was always a little leary of getting my HID light close enough to get these results

Please, all thoughts are Welcome here !

Cheers

I had a Do si dos #33 in a hempy last winter that just refused to stop drooping right into flower.
She grew as fast as the others, and in flower she produced as well as a previous plant of that strain. But she never really looked happy in veg.

 

[Northward]

Thanks @Jon !

But they are Sativa's

This is the Acapulco Gold I am concerned with. Just not quite embracing her situation

But, color is good, she's keeping up with her sisters in growth/size and feeding.

I was always a little leary of getting my HID light close enough to get these results

Please, all thoughts are Welcome here !

Cheers

Nice work! Using old school HID !!!

 

[Sativa1970]

For those who have had positive results using VPD, what calculator or chart did you use? What strain were you growing? Every calculator and chart seems to give different final values. 79.5F at 85RH has given a PVD of .49 to 1.45 on different calculators. Charts range around .8 to 1.2. Is there an offset range to accommodate for the needs of arid vs tropical strains?

I just look for the strains ancestral origin and then replicate the natural climate conditions. Generally this puts me around 30RH over the average recommended PVD with equatorial strains. F/RH; 80/80 seedlings, 80/75 veg, 75/70 flower. Reducing RH causes the plants to stop praying and wilt. Just curious if anyone has further insight into this.

 

[Chuckeye]

I had a Do si dos #33 in a hempy last winter that just refused to stop drooping right into flower.
She grew as fast as the others, and in flower she produced as well as a previous plant of that strain. But she never really looked happy in veg.

In the past I've had the odd one or two in a grow that droop an hour or so before lights out but generally they look more perky than two in this batch

Cheers

 

[Chuckeye]

Nice work! Using old school HID !!!

Not so @Northward

This is under my new LED !

Cheers

 

[Melville Hobbes]

In the past I've had the odd one or two in a grow that droop an hour or so before lights out but generally they look more perky than two in this batch

Cheers

Yeah, I've had some that did that too. I just figured they'd reached their light saturation point and we're ready for the dark period.
The DSD #33 was droopy 24/7.

 

[Chuckeye]

For those who have had positive results using VPD, what calculator or chart did you use? What strain were you growing? Every calculator and chart seems to give different final values. 79.5F at 85RH has given a PVD of .49 to 1.45 on different calculators. Charts range around .8 to 1.2. Is there an offset range to accommodate for the needs of arid vs tropical strains?

@Sativa1970, @Delps8 did the research/numbers for us in Post #21

I'm getting my most accurate (?) readings with an android lux app and using the conversion factor of .015 !

I just look for the strains ancestral origin and then replicate the natural climate conditions. Generally this puts me around 30RH over the average recommended PVD with equatorial strains. F/RH; 80/80 seedlings, 80/75 veg, 75/70 flower.

Won't work for me, I almost always grow four different strains from all over the darn place

And even with a humidifier I usually can't quite get up to 60%....

Reducing RH causes the plants to stop praying and wilt. Just curious if anyone has further insight into this.

Under HID my plants were always praying in the mid 40's.

Once I transplant I may discontinue using the humidifier and see how they do ?

Cheers

 

[Jon]

Thanks @Jon !

But they are Sativa's

This is the Acapulco Gold I am concerned with. Just not quite embracing her situation

But, color is good, she's keeping up with her sisters in growth/size and feeding.

I was always a little leary of getting my HID light close enough to get these results

Please, all thoughts are Welcome here !

Cheers

Oh yeah some sativas too. Well I can’t call it. I’ve also had plants that simply never pray. But looking closer, I see some pretty much praying and others not. Mt new theory is that this is related to using the same light for multiple statins at once, which is often my MO as well. In my experience, the strain specific light desires alone almost guarantee they won’t all respond the same way. Based on color and development I don’t think this is an issue for that reason. That’s my take and I’m sticking with it: lmao.

 

[Northward]

Oh yeah some sativas too. Well I can’t call it. I’ve also had plants that simply never pray. But looking closer, I see some pretty much praying and others not. Mt new theory is that this is related to using the same light for multiple statins at once, which is often my MO as well. In my experience, the strain specific light desires alone almost guarantee they won’t all respond the same way. Based on color and development I don’t think this is an issue for that reason. That’s my take and I’m sticking with it: lmao.

Or have a plant that always droops after watering which happens to

 

[Sativa1970]

I'm getting my most accurate (?) readings with an android lux app and using the conversion factor of .015 !

Did I missed something? Thought that was just referring to light value. Was it in reference to lights leaf temp effect on VPD?

The veg PVD chart you posted shows 80/75 in veg would only be 5RH high, unlike some other charts I have seen. Why there is a discrepancy between charts was what I was trying to figure out. If they all use the same equation, either the metric calibration defining 0 or the goal must be different. If so why? The only logical reasons I can think of is vary sloppy math or each chart was created using different climate strain as a base target. The latter would explain why two plants with different genetic history will not equally thrive at one given PVD? But they may both thrive under conditions recommended by two different charts.

I generally run higher humidity simply because I can't keep it much lower. I am by no means trying to increase the RH. Right now my flower room is empty with all the hydro tanks clean and dry. Everything is turned off. Current temp is 73F with 79RH.

 

[Chuckeye]

Did I missed something? Thought that was just referring to light value. Was it in reference to lights leaf temp effect on VPD?

Ah, middle of the night misunderstanding, my bad

Par isn't a factor in determining VPD...

The veg PVD chart you posted shows 80/75 in veg would only be 5RH high, unlike some other charts I have seen. Why there is a discrepancy between charts was what I was trying to figure out. If they all use the same equation, either the metric calibration defining 0 or the goal must be different. If so why? The only logical reasons I can think of is vary sloppy math or each chart was created using different climate strain as a base target. The latter would explain why two plants with different genetic history will not equally thrive at one given PVD? But they may both thrive under conditions recommended by two different charts.

I also found three different charts for cannabis and they all gave me different readings.

So I decided to pick one and use that as a base. Then I will do the best I can under my conditions !

I generally run higher humidity simply because I can't keep it much lower. I am by no means trying to increase the RH. Right now my flower room is empty with all the hydro tanks clean and dry. Everything is turned off. Current temp is 73F with 79RH.

Cheers

 

[Chuckeye]

Can't remember which site I got this but here is the chart !

Cheers