Heat related question(s)

[Wiimote]

I have some WW, AK48, and Maui Wowie going in my closet currently (first non-bagseed grow and all are Nirvana's). I had some heat issues pretty much since I started flower (43 days). The heat issue is now completely under control however.

Anyway, my questions:

First, I know the heat problem will effect my yield and finishing times greatly, what I want to know is, since my girls are on day 43 (but they look like they are closer to day 25-30ish, per pics I see here) will they now start filling out and bring my harvest up to "acceptable" levels? Meaning will they still toss out more buds or will the (tiny) buds that are there just mature?

Also, even though I have my temps now in the 70 (low) to 84 (high) range, I was wondering if using my fan as a straight exhaust might get me even lower temps. Right now I have a squirrel cage fan setup to a duct sucking air through my hood. Having the ducting though decreases my CFM, if I remove the ducting the airflow increases by a lot. I could also take the flange off which according to the manufacturer, would increase the CFMs by almost 25%. Does that extra airflow compensate for not having my exhaust going through my hood?

Thanks in advance

(btw I'm not really worried about the Maui, as she has a long way to go either way)

 

[Guest]

I'm not an expert by any stretch. However, I don't think anyone can answer your question about what your yield might be. There are just too many variables that aren't known.

You are doing the right thing by getting your temps down into a range that is acceptable. That's all you can do. I didn't suck any air thru my 400W light. I had a nice open grow space though with plenty of fresh air coming in so it wasn't an issue for me.

IMO you cannot have too much fresh air. I think many of these closet and micro grows go bad because people are trying to do too much with too little. But some make it work well so I don't know.

Good Luck
Obli

You can see I had a nice big space with 250CFM coming in at floor level thru that duct you can barely see at the bottom. My carbon scrubber exhausted at eye level just above those Ice buds hanging to dry. the cord is on the right. cliuck to enlarge

 

[inflorescence]

... what I want to know is, since my girls are on day 43 (but they look like they are closer to day 25-30ish, per pics I see here) will they now start filling out and bring my harvest up to "acceptable" levels? Meaning will they still toss out more buds or will the (tiny) buds that are there just mature?

I'm no expert either, but from experience I think early on in bud formation it's better to have a high rH as this helps the buds plump ("fill out') then the rH is lowered as the buds mature to make them harder and less prone to mold.
You're kinda going about it in the opposite manner.
I think early on in bud development humidity is extremely important as the buds fill out when the stress is mininal due to flucualting rH and the buds are able to not lose as much h20 to the atmosphere due to transpiration so instead of struggling to survive by regulating their transpiration they can focusus of cell division the cell elongation. After that the rH is lowered so the trich development can proceed which is a bit different than the plant matter bud formation.

 

[Wiimote]

I think you misunderstood my question Oblidio, so let me try again.

The plants definitely slowed down during my little heat wave, what I want to know is will they "continue down the path" and take longer and finish like they normally would (at a reduced harvest) or just finish up with what has already grown?

For example in my other runs, I have gotten a bunch of "hairs" then after a week or so those start to die off while being replaced with new sets of "hairs". At this point, they are still on this first "flush" of calyx (sp?) growth and I am wondering if I will get the second, third, etc flush of "hairs" or if the heat has screwed them up to the point that I will only get what is there now and now further growth.

Inflorescence, rh isn't really an issue, it stays within 2-3% of 40% rh in my cab. I have my girls in my basement which rarely fluctuates in rh. The basement is almost completely underground, so in the humid dog days of summer, and the bitterly cold depths of winter, I am within a percent or two of 40% rh inside my cab (low rh has been 38% and high has been 41%) thanks to pushing 6 times my cab's volume of air through the cab per minute (drawing from the basement air)

 

[HoTSauce]

I'm in a 4'X3' cabinet with 1200W and the only way i'm able to keep my temps down it to pull the heat directly off the lights and reflectors. instead of removing the duct you could fit a T connection and pull some air off the hood and have the new connection pull air from the cabinet. That way you won't lose the cooling of the hood but you would have a larger intake.

 

[Guest]

Ok I'm sorry. I guesss I did misunderstand. I simply don't know. I would guess if the plant is returned to a normal grow situation, it will hopefully begin again to grow normally . I don't know if you have permanently altered the grow cycle. I want to think not. I'm sure some strains are more sensitive to this sort of thing than other strains are. And maybe even pheno to pheno will react differently. I want to think the plant will resume new calax preduction. The end result will simply be buds somewhat smaller. Maybe one of the experts will see this and give us a good opinion of what you can expect.

 

[Wiimote]

Well Oblidio, I hope your right. I don't have any burnt areas (crispy leaves etc) they all just slowed down. I'm sure the Maui will recover fine, as it has weeks and weeks to go (just started showing pistils 2 weeks ago). On a side note, the Nirvana Maui Wowie looks exactly like I remember from when I lived in HI (late 80's early 90's) and my friend was growing it.

 

[Guest]

The plants LIKE higher humidity - and it is very helpful to inhibit spider mites, but it can also lead to mold and bud rot. High temps are a real bear - as my garden can attest to. There is a lot of ying and yang in this hobby.

It's hard, but try to look towards a harvest rather than yeild. Once you learn how to get to harvest, then you can work on yeild.

rotate your dark period to the hottest times of the day, if possible and Ventilate! Venilate! Ventilate!

 

[gamehaze2]

listen this situ wors weirdly high temps are good for growth i think but they also can cause mould but as i know it works in a triangle to avoid mould u try and not mist or if you do do it when they sleep and your heat shudnt be that much of a prob but i would definatly invest in a fan of some sort youll get that money back in your harvest seriously its worth it

 

[Wiimote]

I've already updated my ventilation and gotten temps under control. Still wondering though if the CFM hit from having the fan ducted to my hood is worth it though.