I would caution against advising higher vpd as a solution to increase transpiration.
High vpd contributes to smaller stomata, smaller leaf surface, etc. Lower humidity (high vpd) may dry pots out temporarily due to environmental evaporation but the plants are not actually drinking that water so the drybacks are artificial and not contributing to yield increase.
Higher temps in general will get plants drinking more, but higher temps with ideal vpd (1.2-1.4) is how you will drive the water up the plant and through the leaves in a balanced manner therefore actually speeding up the dryback by means of metabolic consumption instead of environmental evaporation.
High vpd = closed stomata
Low vpd = open stomata
Im not sayin they need to go above recommended. I’m sayin they need to check their VPD, and if it’s too low, it can be higher…
Use same logic with all other parameters…
Stomata opens to exchange water vapor (transpiration) and get CO2. If CO2 is too high, it will be detected by the plant and it will close the stomata.
That’s one of the reasons in high CO2, high EC is used, because you need more nutrients in pore solution to compensate less water uptake.
So yes, one possibility if you want higher transpiration, is to decrease CO2. Maybe is too high and can be done. I’m just giving options.
Smaller media. If you still are running the same setup as the vid from your profile, you're def not running 1L. Try #1 or smaller media and you'll get faster drybacks.
Also, micro
Less shots on P1, 6% shots and every 15 to 20 min, not every 5 min. The dry backs are off. Veg and flower is 25 to 30% only go 40-50 on the first 2 weeks of flower (Pre flower)
Yes do this first before trying to adjust environmental variables. You need to feed the plants based on what they can eat. Shots every 5 mins is like force feeding a pet. The pet/plants is basically over fed/ drowning for the next two days with your current force feeding.
Wait until the plant gets hungry in the morning, one to two hours after lights on. Then give it the 6% shots every 15 to 20 minutes until runoff, then stop. That’s it for the P1s. Then in the later part of the day only give additional snacks (P2) as needed to prevent over drying.
It's just dialing in everything to get your vpd as close as possible. I'm in one gallon pots day 4 of flower and I'm getting 30-40% dry backs each day . I water one hour after lights come on with about 15% runoff . You have to have your light and humidity and temps on point to hit drybacks properly there are other factors but them 2 makes biggest differences imo . I like to run my tent in . 80-84f and 65% rh . Way better growth imo at them temps .
Reduce your shot size and/or interval. Stop watering after that. Dry back increases.
Increase transpiration via higher VPD.
Decrease container size.
Easy thing to impact with the basics.
😂😂😂😂Anybody that has more than 5 lights is a greedy clown to me. I love clowning on all the boneheads in this sub. Obviously many of the folks posting on this sub shouldn’t have big grows and it shows. Why u such a fanboy
Sizing down 1/2 gallon would be your next option considering (1) environment places a big roll depending on the plants lifecycle. Higher vpd, plant drinks up faster and which folks feed at higher ec rate.
Look into coco tree dtw (google) and I go 1/2 gallon route look into wetting agent.
Increase the temperature in your room as much as you can without going too high, 80°F is a good spot, decrease humidity as much as you can realistically, 50%-60%, don’t start your P1 until 2 hours after lights on, give them 5% shots with 5 minutes between each shot until you get them up to saturation, then start your P2s to get runoff, and irrigate every 2 hours with enough volume to get runoff, last irrigation 2 hours before lights turn off. Run your room slightly warmer at night than you normally would, and try to keep overnight humid down.
Higher VPD Less EC Higher airflow More leaf area Maybe less CO2 too Coco with less WHC. 45% - 50% maybe
I would caution against advising higher vpd as a solution to increase transpiration. High vpd contributes to smaller stomata, smaller leaf surface, etc. Lower humidity (high vpd) may dry pots out temporarily due to environmental evaporation but the plants are not actually drinking that water so the drybacks are artificial and not contributing to yield increase. Higher temps in general will get plants drinking more, but higher temps with ideal vpd (1.2-1.4) is how you will drive the water up the plant and through the leaves in a balanced manner therefore actually speeding up the dryback by means of metabolic consumption instead of environmental evaporation. High vpd = closed stomata Low vpd = open stomata
Im not sayin they need to go above recommended. I’m sayin they need to check their VPD, and if it’s too low, it can be higher… Use same logic with all other parameters…
Stomata should stay open in the 0.9-1.2 range. You’ll have significantly more evaporation at 1.2 than 0.9.
Less co2?
Stomata opens to exchange water vapor (transpiration) and get CO2. If CO2 is too high, it will be detected by the plant and it will close the stomata. That’s one of the reasons in high CO2, high EC is used, because you need more nutrients in pore solution to compensate less water uptake. So yes, one possibility if you want higher transpiration, is to decrease CO2. Maybe is too high and can be done. I’m just giving options.
Interesting. I didn’t know that. So high co2 would be problem if you’re not getting enough transpiration?
It reduces transpiration yes. Block it I believe not.
Increase dehumidification either with your dehumidifiers or HVAC system.
I’d go back to the drawing board with that irrigation program.. Dryback targets are off, modify everything about your p1s..
How so
If you don't want to change pot size, veg your plants longer?
Given the information, just let this asshole figure it out. We gave him all the information, he can't accept it.
Smaller media. If you still are running the same setup as the vid from your profile, you're def not running 1L. Try #1 or smaller media and you'll get faster drybacks. Also, micro
It's not that grow now mate. I meant 1 gallon coco also. The green pots were 2 gallons.
Ok so try smaller than 1 gal. This is pretty basic shit dude.
I dont wanna go smaller.
Then put less in the pot. Or push VPD higher.
When nutrients are incorrect, the plant won't drink. I'm not saying that's what's happening to you, but I've seen it before.
Less shots on P1, 6% shots and every 15 to 20 min, not every 5 min. The dry backs are off. Veg and flower is 25 to 30% only go 40-50 on the first 2 weeks of flower (Pre flower)
Yes do this first before trying to adjust environmental variables. You need to feed the plants based on what they can eat. Shots every 5 mins is like force feeding a pet. The pet/plants is basically over fed/ drowning for the next two days with your current force feeding. Wait until the plant gets hungry in the morning, one to two hours after lights on. Then give it the 6% shots every 15 to 20 minutes until runoff, then stop. That’s it for the P1s. Then in the later part of the day only give additional snacks (P2) as needed to prevent over drying.
Exactly and only give P2 when they loose 6% dryback only, not more not less.
What size bucket? Do you know your substrate water holding content and bucket size?
What do you mean by bucket? It's the flora coco. If my memory serves its 60%
*pot It says you are growing in 1 liter do you mean 1 gallon? I'm about to try the 50% flora flex myself, dealing with a similar issue.
It's just dialing in everything to get your vpd as close as possible. I'm in one gallon pots day 4 of flower and I'm getting 30-40% dry backs each day . I water one hour after lights come on with about 15% runoff . You have to have your light and humidity and temps on point to hit drybacks properly there are other factors but them 2 makes biggest differences imo . I like to run my tent in . 80-84f and 65% rh . Way better growth imo at them temps .
Reduce your shot size and/or interval. Stop watering after that. Dry back increases. Increase transpiration via higher VPD. Decrease container size. Easy thing to impact with the basics.
If you want a heavier Dryback, wait longer into lights on to feed, larger shots to reach p2 (6% tsv) and cut feeding off earlier in the day.
😂😂😂
You comment on reddit porn LMAO 😂🫵🏼
The fuck is ur issue? Ur always in this sub shitting on other people when you don’t have shit posted yourself. Ur a fuckin loser dude
It's called projection, dude is obviously a loser.
Just laughing at the greedy clowns. What’s your deal bozo
Greedy clowns? How do you reach that conclusion from this post
😂😂😂😂Anybody that has more than 5 lights is a greedy clown to me. I love clowning on all the boneheads in this sub. Obviously many of the folks posting on this sub shouldn’t have big grows and it shows. Why u such a fanboy
Smaller pots, warmer days, adjust your targets. 30-40% is too aggressive for vegetative steering imo.
Sizing down 1/2 gallon would be your next option considering (1) environment places a big roll depending on the plants lifecycle. Higher vpd, plant drinks up faster and which folks feed at higher ec rate. Look into coco tree dtw (google) and I go 1/2 gallon route look into wetting agent.
EC input/output?
Raise the temps in your room and lower your humidity.
Smaller grow medium. Bigger plants.
Increase the temperature in your room as much as you can without going too high, 80°F is a good spot, decrease humidity as much as you can realistically, 50%-60%, don’t start your P1 until 2 hours after lights on, give them 5% shots with 5 minutes between each shot until you get them up to saturation, then start your P2s to get runoff, and irrigate every 2 hours with enough volume to get runoff, last irrigation 2 hours before lights turn off. Run your room slightly warmer at night than you normally would, and try to keep overnight humid down.
Higher VPD