SuperBadGrower
Active member
~900 ppfd
~86F
nothing but white diodes
https://manicbotanix.com/light-co2-temperature-relative-humidity-and-photosynthesis/
yeah that is my issue as well. It looks like there is too much light but the meter says it is ok. Only have this with qb,s. Under my blurple (or any other lightsource)i can start seedlings at 300 500 pond without issues....
Or there is something wrong with your lights or we are doing something horribly wrong.
Haha =) 3000K these, 80 CRI (All I have is 80)
Some are vegged under 3000K, others 3500K, no difference between those 2 to me.
Using about 35-45w / sqft
Yeah man everything on that website is absolutely on point! anyone struggling with grasping information about growing should absolutely make it a priority to read everything they offer there. I'd put some other good links that are relevan, but I'm pressed for time.
Just to give some extra faith that everybody can make it with white diodes (well, until week 4 at least )! Mine are on hydroponic feed but if you are on point with your transplants, living soil or whatever you may use, it should be good! Keep at it Cheers
edit: again here the link to the website:
https://manicbotanix.com/light-co2-temperature-relative-humidity-and-photosynthesis/
Go to Grow info menu for more
I'm not affiliated in any way. I think they make nutrients (I never used / never plan to use them).
Seems to be the point in time where things go awry for me under LED. Thanks for the link and info - will check it out later. And I agree, your babies are looking real good - for a super bad grower.
^ great stuff!
What happens? I have a similar experience with peat mixes. With that stuff I found it hard/impossible to correct because of the CEC and the nutrition present in the mix. That's one reason why I switched to coco. Having/maintaining the right amount & balance of nutrients in a soil mix is really an art. It's easier said than done I guess..
I'm not really a beleiver that a seed can go 2 weeks with what's in the cotyledons, that's not true at all IME. I fucked up plenty of times with coco. For example if you get fresh high quality coco and don't treat it properly, it will be a very low EC and barely any nutrients will be available. You put a seed in that, you will see the cotyledons yellow extremely fast. in days. (And then the plant starts to stunt ofc)
My experience is that the typical bag peat mix (that's ~1.2 EC of nutrients) starts great seeds. On a side note, when I researched peat mixes it turned out that, when tested, quite a few were a bit hotter than advertised.
& for the rest I would say again to not trust meters at all unless it is an apogee or li-cor. Use them to measure the spread of one type of light source, yes, but don't use them to compare light sources. You guys would not believe how absolutely fucking stupid I felt as I compared my lux meter readings with apogee sensor. (Sorry if I'm preachin to the choir, I don't know or remember which sensor you have)
The same kind of feeling crept over me when I tested my first "TDS meter", and it turned out that I had been overfeeding by more than 30%...hehe
I’m having the same issues as everyone else. Organic soil grower that has zero issues under hps, now switched to LEDs and I have issues in veg, mostly I’m able to iron things out by flower with going extremely low on the dimmer. After reading through this thread, I’m convinced it’s temperature related. The LEDs run so cool my tent is at 76F, and come to think of it by the time I switch to flower they are able to handle more light which increases the temps in there.
I guess it makes sense if you think about it in simple terms. What I’m hearing being described is that the newer LED lights (QBs) are very intense. Intense lighting increases the plants nutrient needs. That’s simple enough right? Not hard to understand, but in combination with low temperatures the plant doesn’t drink much/as much. Well if the plant isn’t drinking then it’s not getting nutrients either since the primary route of nutrient uptake is through the root zone with water uptake. So the plant uses up its stored systemic nutrient reserves while transporting in a minimum, insufficient amount of new nutrients due to low water uptake. This causes the deficiencies we are seeing. Whereas some other types of lighting either don’t hit the instensities LEDs do (T5s, CFLs) or if they are capable of equal par output it is in combination with higher heat output that keeps water uptake and thereby nutrient uptake moving along.
Im not saying this is exactly right, but I’m betting getting ambient temperatures up to 85 degrees or so will mostly eliminate this problem, like some have suggested in this thread.
I just got a 3x3 with a HLG 550 Rspec slammed in there. I had it running at 75w, gave them three or four days and bumped it to 125w at probably 20”, they seriously disliked it. Backed it off to 105 and they aren’t happy still. Intervien yellowing. Ironically enough a few are showing burnt tips though too like the feed is too high, but yet clear magnesium deficiencies.
Tonight I’m going to raise the light to max height, even if it’s 4’ above, then I’m going to bump up the dimmer a bit, maybe to 125w-150w and set my AC infinity controller to exhaust only when needed at 85 degrees to get the temps bumped up. I’ll probably give them a Epsom foliar at 6g/liter tonight then, and look to transplant them into a fresh mix in a week or two.
I’ll mix up the new soil tonight so it has a few weeks to “cook”. Probably go light in overall nutes but high on cal mag.
My final flowering pots are 3.9 gallon, so I’m thinking 1/2 cup of amendments per pot, not including the lime and azomite.... on a base of promix bx and 20% EWC. I’ll use 2 TBS/gal dolomite and 1 TBS/gal azomite.
The 1/2 cup amendments will be equal parts crab shell meal, neem meal, kelp meal and Epsoma tomato tone.
There will probably be about 3 actual gallons of base soil mix per pot. Sounds about right? Running DJs Flo and BB and i have bio bizz bloom for mid to late flower supplementation if needed.
Anyone seeing anything grossly out of whack with my soil mix?
Your mix seems good. What are your relative humidity levels in the room? I'd also have a look at the rate of air circulation.
Tonight I’m going to raise the light to max height, even if it’s 4’ above, then I’m going to bump up the dimmer a bit, maybe to 125w-150w and set my AC infinity controller to exhaust only when needed at 85 degrees to get the temps bumped up. I’ll probably give them a Epsom foliar at 6g/liter tonight then, and look to transplant them into a fresh mix in a week or two.
Yup ...raise light....raise temps...raise ppms...
6g x Liter seems a bit much IMO....i always supplement 1g x gal if soil drench or 3g x gal foliar (this will ad more or less 75ppm Mg)
Also The ACT input will make things move faster like Koondense said.
I solved all the problems switchin to no nutes in the mix and feeding a well balanced formula like Megacrop by the ppm....no more ghost problems...no more guessing...just "little bit more or little bit less"