Low Yield Both Harvests'. Poor Air Cirulation??

[rickymac21]

Hey ladies and gents. I am a little troubled with the yields I'm getting from my ladies . my previous grow I vegged a Sweet Afghani Delicious for 5 weeks in dwc then flowered for 8. My total harvest dried was just around 48 grams. I blamed that on the lack of nutes and equipment (only base nutes, and no ppm,ec meter) . But now I have 4 s.a.d's in 2 gallon pots using GH organic line. They were vegged for 4 weeks (lst'd for height) and are in week 7 of flower. They look healthy but the buds just seem to be lacking in size.

So now I'm starting to think the environment is lacking. Specifically my airflow . I had an oscillating fan in there but nothing to bring in fresh air. Could this be a significant reason why my yields seem to be low?

 

[LoboStoner505]

what is the size of light your using? Im curious as to why ur yield was so low because I am currently growing this strain as well as a few others. I only have a fan blowing on my plants and it seems to work fine. If the space your growing in is to small that could be your problem. You might have to get an air exchange device.

 

[malignant]

yes, sounds like it, especially if you are using an hid

 

[rickymac21]

Some more information if it helps

-temp-72-78
-water with nutes every other watering. water about 1000 ml to each 2 gal pot every 4-5 days
-600w hps
-5x5 rooom
-oscillating fan. (did not have fan intake for fresh air. I did just put one in about 20 minutes ago in hopes it will help)
-I don't know the humidity but the box is in a basement so the air is relatively dry down there.

 

[malignant]

yeah your usind an hid, your light needs to be ventilated, it will cool your room, pull in fresh air, and extend the life of your bulb. i use 4 vortex inline fans to cool my 5x5x7 tent. 2 exhaust, and 2 replenish.

 

[LoboStoner505]

I saw a video where a 600w HPS with a brand new bulb performed the same as a 1000w HPS bulb with a couple grows on it already. You seem to have a pretty cherry set up so maybe check ur bulb if u think ur lacking on the dense buds.

 

[rickymac21]

Figures. . Sadly I don't have the funds to get that equipment right now. Hopefully I can do that in the near future

 

[rickymac21]

I saw a video where a 600w HPS with a brand new bulb performed the same as a 1000w HPS bulb with a couple grows on it already. You seem to have a pretty cherry set up so maybe check ur bulb if u think ur lacking on the dense buds.

I actually just replaced my bulb a few weeks back with a plantmaxx . It seems to be a lot brighter than the cheap bulb that I bought the hood with. . So I'm not sure if that is the problem. I'm stuck on the thought that it has to deal with lack of co2.

 

[malignant]

add box fans, if you can disrupt enough heat in the air you can hold out till it gets cold enough to not matter, in the winter i run my lights at night, and reverse the flow of the fans so it pushes cold air across the light and heated air into my house, the room exhausts into my house and cold icy air from the outside keeps the tent cool, in winter i can get nice lower temps and run 2k watts continuously.

 

[rickymac21]

add box fans, if you can disrupt enough heat in the air you can hold out till it gets cold enough to not matter, in the winter i run my lights at night, and reverse the flow of the fans so it pushes cold air across the light and heated air into my house, the room exhausts into my house and cold icy air from the outside keeps the tent cool, in winter i can get nice lower temps and run 2k watts continuously.

That's exactly what I would do if I wasn't in an apartment.. I have to try to keep it somewhat stealth. In fact I plan on changing the whole grow up after these ladies are finished. . I want to move it into my closet and build a 3x4 flood table. Sog about 24 girls vegged for a week (maybe 2). I would have the grow in a box within the closet so I can exhaust the bulb and keep the box as cool as possible. And hopefully add a co2 tank and regulator... HOPEFULLY this will be more efficient than what I'm doing now

 

[vilify]

heats not an issue. could be a matter of air quality.

could be the genetics you got? not every seed is the best yielder.

 

[malignant]

if your using hydro and synthetic nutes co2 is a definite must. then you need a sealed room.

 

[rickymac21]

if your using hydro and synthetic nutes co2 is a definite must. then you need a sealed room.

By sealed would that mean that I wouldn't use a carbon filter and fan venting through the light hood? So I would have ducting through one side of the box running through the light hood and out the other side of the box. And of course a fan to pull the air through. That would be the only way I could keep the box cooled without getting an air conditioner.

 

[rickymac21]

heats not an issue. could be a matter of air quality.

could be the genetics you got? not every seed is the best yielder.

I have thought about the genetics as well. That would mean both my strains I have are bad genetics though. I have GH lemon skunk too and it does even worse than the sweet afghani. . So something is definitely wrong with the environment.

 

[malignant]

you run a fan to cool the light, its on its own vent system, has its own intake and exhaust, then you prime in an exhaust on a damper and a thermostat to vent out if it gets over 95. then you run your co2 at different intervals which allows higher tolerance to heat.

 

[rickymac21]

Awesome ! That sounds achievable.. Hopefully in about 8 weeks I'll be able to set this up. . Thanks for the good input !!

 

[resinousflowers]

co2 is only effective in temps 90 and above in a sealed room.
the temps in his room 72-77 are fine,so a intake fan will be fine.in small spaces tho you can get away with passive intake.

what kind of yeild was you expecting from your last plant?and what kind of yeild were you expecting to get from your current crop?

 

[vilify]

I have thought about the genetics as well. That would mean both my strains I have are bad genetics though. I have GH lemon skunk too and it does even worse than the sweet afghani. . So something is definitely wrong with the environment.

that is very true. but still plausible. Did you grow from seed or clone?

Doing a sealed room is a good idea. Basically everything else is in order, so if that doesnt work, then its down to genetics.
And if its genetics, when you get them replaced, the co2/sealed room will increase yields you would have gotten by at least 50%, and likely more.

 

[malignant]

it doesnt have to be 90+ for co2.. co2 increases your plants tolerance to heat.

 

[gotigers0420]

Hey ladies and gents. I am a little troubled with the yields I'm getting from my ladies . my previous grow I vegged a Sweet Afghani Delicious for 5 weeks in dwc then flowered for 8. My total harvest dried was just around 48 grams. I blamed that on the lack of nutes and equipment (only base nutes, and no ppm,ec meter) . But now I have 4 s.a.d's in 2 gallon pots using GH organic line. They were vegged for 4 weeks (lst'd for height) and are in week 7 of flower. They look healthy but the buds just seem to be lacking in size.

So now I'm starting to think the environment is lacking. Specifically my airflow . I had an oscillating fan in there but nothing to bring in fresh air. Could this be a significant reason why my yields seem to be low?

I would also think about going with larger Smart pots. I like the five gallon.