3rd times a charm!

so I’m going to switch it up one more time. I have 2 grows under my belt. First was dwc using technaflora nutrients, second was promix with biobizz nutes. This go around I’m trying my hand at a true organic living soil, with only ph and temp correct water. 6 plants on the left are Death Star(don’t know genetics) 4 on the right are accidentally pollinated topanga bananas by briscos bargain beans. Pollinated by a pipedream x the animal that threw balls.
 

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I mixed up a supersoil based on master marks recipe( found it on YouTube) 40% fox farms ocean+forest, 20% biochar, 20% worm castings, 20% pumice( I used expanded clay pebbles) kelp meal, neem seed meal, and alfalfa meal. It is cooking in a hefty tote at the moment. I soaked seeds 24 hours, then popped them in to rock wool cubes. When roots started poking out I planted them in solo cups with happy frog potting soil, when I repot I’ll mix in 25% of my supersoil and gradually increase until they are in 100% of my mix. Any suggestions on how bright my lights should be? I have an adjustable dial, in my first grow the tips of leaves we’re getting light burn, and I am wondering if my lights caused one of my plants to hermie? I must have been in the clouds one night messing with my lights because when I found the balls my lights were turned to 10! Could too much lights stress the plants and cause a hermie?
 

jaguarlax

Tactical Gardener
Staff member
Moderator
I mixed up a supersoil based on master marks recipe( found it on YouTube) 40% fox farms ocean+forest, 20% biochar, 20% worm castings, 20% pumice( I used expanded clay pebbles) kelp meal, neem seed meal, and alfalfa meal. It is cooking in a hefty tote at the moment. I soaked seeds 24 hours, then popped them in to rock wool cubes. When roots started poking out I planted them in solo cups with happy frog potting soil, when I repot I’ll mix in 25% of my supersoil and gradually increase until they are in 100% of my mix. Any suggestions on how bright my lights should be? I have an adjustable dial, in my first grow the tips of leaves we’re getting light burn, and I am wondering if my lights caused one of my plants to hermie? I must have been in the clouds one night messing with my lights because when I found the balls my lights were turned to 10! Could too much lights stress the plants and cause a hermie?
Depends on what sort of lights you're running... Can you post specs for us please?
 
This is all of the info I have on them, I ordered cheapo on amazon, I have 4 of these boards with 2 240w drivers in a 3x3 Vivosun tent. I made sure I had at least 24” of canopy space in flower. I was around 30” in veg.
 

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This picture was taken 11 days of... the plant on the front right was my problem plant. Looks like leaf tips are curling down? Thanks for any input
 

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jaguarlax

Tactical Gardener
Staff member
Moderator
This is all of the info I have on them, I ordered cheapo on amazon, I have 4 of these boards with 2 240w drivers in a 3x3 Vivosun tent. I made sure I had at least 24” of canopy space in flower. I was around 30” in veg.
I have a set of enfun boards and they work really well for me... They are Samsung top bin diodes, so they do get bright...

It depends on the phase of the grow and what you are looking to get out of your plants... I dont veg with my enfuns, but if I did, I would keep them high (36 inches or so), and start at about 50 percent brightness... See how the plants respond from there, then make your adjustments.

In flower, I use a set of enfuns in conjunction with some other brands, but the concept is the same... I start at about 24 inches at 80 percent... Depending on the cultivar, thats usually the sweet spot, but I do see light stress sometimes, so keep that in mind. Your environment is going to play a big role in what you experience as well... Cannabis is known to accept more light when the Co2 levels are higher...

One more thing worth mentioning... You have a two brightness adjustment dials. The obvious one being the one wired to the driver... The second is on the back of your driver, and can only be accessed with a small Philips head. Its important to set that dial first so that you can use the light to its full potential... Shouldnt be hard to find on youtube...


These bad boys make the life of a LED Gardener so much easier...

Amazon product
 

coste

In Bloom
I also run those lights, and have experienced light burn on seedlings and clones. IIRC i measured ~35k lux @ 24" from the light with a free light meter app on my phone. That's not too much for a mature plant, but it's quite a lot for a younger plant.

Full disclosure: I was running two of those qb boards with two blurples last run. I'm now running four of those qb boards, with one blurple, currently have the qb's set at 50% as I'm waiting for clones to start vegging. Will kick em up once I see some actual upward growth.

All that being said, I'd say your nutrient regiment was too hot. Light bleaching shows up as just that, bleaching. tips won't burn. Several things can cause leaf tips to curl down: overwatering, nitrogen toxicity, VPD, temp swings, etc.
 

coste

In Bloom
One more thing worth mentioning... You have a two brightness adjustment dials. The obvious one being the one wired to the driver... The second is on the back of your driver, and can only be accessed with a small Philips head. Its important to set that dial first so that you can use the light to its full potential... Shouldnt be hard to find on youtube...
I was wondering about this a few weeks back! Do you know what they set that to from factory? I thought I could squeeze a bit more out of the boards I have but I also didn't want to prematurely burn up the drivers by screwing around with something I don't fully understand lol
 

jaguarlax

Tactical Gardener
Staff member
Moderator
I was wondering about this a few weeks back! Do you know what they set that to from factory? I thought I could squeeze a bit more out of the boards I have but I also didn't want to prematurely burn up the drivers by screwing around with something I don't fully understand lol
I’m not sure what factory settings is, or if there even is one... I would imagine it would vary a bit if they are testing them in a factory...

I like to dial mine all the way up to full power, and turn it back about 10 -20 percent... that gets me where I wanna be wattage wise... I do know you can over drive some models but this particular driver the xlg-240-h -ab has a hiccup protection that prevents you from “burning up” your stuff
 

coste

In Bloom
I’m not sure what factory settings is, or if there even is one... I would imagine it would vary a bit if they are testing them in a factory...

I like to dial mine all the way up to full power, and turn it back about 10 -20 percent... that gets me where I wanna be wattage wise... I do know you can over drive some models but this particular driver the xlg-240-h -ab has a hiccup protection that prevents you from “burning up” your stuff
so is it reasonably safe to do this without having a wattage meter on hand? and do you do the adjustment with the driver and boards plugged in? and lastly, when you do this, do you have the external pot turned to 100%?
 

Burned Haze

In Bloom
From led’s if 600wish should be ran at 30-50% when a plants at full stage and at suggested canopy level and it’s always suggested to daily watch to plant for the stress cause it’s not instant for the plants reaction. “400 to 600 μmol∙m-2∙s-1 PPFD can be sufficient. Flowering plants will benefit from more intense light with 600 to 900 μmol∙m-2∙s-1 PPFD”

 
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