Leafy Light Buds in DWC

[rickyanny]

When harvesting plants out of my DWC I always end up with leafy light buds. Some buds are better than others but overall the outcome is a letdown after what is expected. The environment does get too hot, GH 3 part solution was used, and the strain was sage n sour. What could be the main cause of this? Please feel free to ask more questions because I would love to learn how to get better.

[rickyanny]

Also a 400 watt hps in about a 2 x 3 area was used with just white walls.

[xcrispi]

Try some Koolbloom ,
Crispi :jointsmile:

[M1K3]

To much heat will cause that to happen.

[rickyanny]

will co2 injection help the heat problem?

[alwayssleepdeprived]

if I remember right co2 does allow for higher temps but if it's gettin over 100 in there I'd agree you should start there and work once that's resolved

also depending on the type of strain a 400w hps won't grow huge like show buds especially if it's not extremely close to the plants 400 loses power quickly as you move it away that was definately a problem of mine on the first grow

a pic always helps give us some of the info if ya know temp and light distance maybe ph and ppm foods plant height how long in 12/12 etc

[LOC NAR on probation]

Watch out for c02 in a people living area. It is heavier than air and can flood out oxygen and kill. Just a heads up. Be carefull around people.

A 400 hps will do pretty good but mine would grow right into the light and burn the top off. I got a good yield just burned tops. That was a small drip system not DWC, 3 foot is as high as I could get for the light to do well.

[rhizome]

Yer getting too hot- bring the temps down. You want to flower @ like 75'F to keep things tight.

CO2 will allow the plants to remain healthy at higher temps, but it won't tighten flower structure. There are a few PGRs that will, but that's not your issue.

[rickyanny]

Is it good to have a small fan on the light while flowering? Would 600 watt make a big difference?

[Al B. Fuct]

A 600 will make your problem worse unless you fix the ventilation system.

You need to move air into the op from outside the op airmass and dump the warmed, moist air someplace where it can not be easily re-drawn into the grow.

Your ventilation system, whether an exhaust fan with a passive intake (2x the size of the exhaust duct) or an exhaust fan with a powered intake (a fan about the same size as the exhaust), should be able to move the room's airmass in 3-5 mins. In example, a 1000 cu ft room needs a 200-330cfm exhaust blower. Your mileage may vary depending upon how much light power you're running.

It's been said- got to get the air down to 75-77, 80 on a bad day. Even CO2 rooms only run at 85, 90 intermittent max.

'Good ventilation' does not include leaving a closet door open a couple hours a day.

[Racerx]

Watch out for c02 in a people living area. It is heavier than air and can flood out oxygen and kill. Just a heads up. Be carefull around people.

A 400 hps will do pretty good but mine would grow right into the light and burn the top off. I got a good yield just burned tops. That was a small drip system not DWC, 3 foot is as high as I could get for the light to do well.

I completely disagree with this statement. I was very paranoid about using CO2 in my area and before I decided on a sealed room, I was going to vent into my attic a few times a day. The attic sits above the rest of the house, so I did some research on CO2 levels and health.

First off, United States law says that you can withstand 5000ppm of CO2 for 10 hours a day without any long term consequences at all. So 5000ppm of constant exposure, 10 hours a day, 5 days a week, for 20 years, and there were no ill effects. Considering my grow room never reaches above 1500ppm, and if I open the door the level is instantly dropped by over 300ppm and within 30 seconds is dropped to below 1000ppm, its not dangerous to be in my grow room even for prolonged periods of time. If I was venting into the house, which I still wouldn't like cause CO2 aint good for you (it just aint that bad either), then my attic is about 8x the size of my grow room so the CO2 would dissipate to a level barely above ambient (ambient around here is around 500ppm).

Now, that being said, there is research showing that some people feel the immediate short term effects of CO2 almost instantly when above say 1200ppm. Generally this is limited to feeling a little tired and lethargic, but the second you reach fresh air this feeling should immediatly disapear. Me? If I felt tired everytime I went into my grow room, well Id never get anything done.

The only time I have ever felt like CO2 affected me (ive been using it for a couple years), was after working in one of my rooms for about 2 hours in 1600ppm CO2 and 90 degree heat. I started to feel a little tired and faint, but I attribute this mainly to the lack of fresh oxygen (displaced by the CO2) and the high heat and hard work. Toxic CO2 levels are above 10,000 ppm. Even if you left your CO2 tank on full blast in a small grow room for hours and then locked yourself in it...you still wouldnt be beyond 2000ppm I can almost guarantee it (that is unless you actually have a real, fully waterproof and sealed room).

Co2 can be a scary thought but harmful? I really dont agree with that. Now I do believe though that CO2 should be the LAST thing you add to your grow operation, as its entirely possible to yield over 2 pounds per light, rather easily, without CO2. Ive found CO2 to specifically fill the buds in, not really make them larger. Just really, really dense.

Flame away.