What's new

looks dry but is not?

DiscoBiscuit

weed fiend
Veteran
Here's an example of a typical exhaust fan. This one's a blower and there are several other styles. You mount the exhaust flange to the partition and stick a carbon scrubber on the intake flange to keep escaped air from stinking.

http://cgi.ebay.com/180-CFM-ActiveA...719?pt=LH_DefaultDomain_0&hash=item4152de7837

Here's a scrubber that fits the fan.

http://cgi.ebay.com/4-x-12-ACTIVATE...680?pt=LH_DefaultDomain_0&hash=item5d2d0e78d0


The size you'll need depends on the cubic size of your grow space (L x W x H). Not sure how many exchanges per minute you'll need. Cabinet grows recommend 3 to 5 times per minute but your numbers may vary.

Anybody have a suggestion????
 

BudGood

"Be shapeless, formless, like water..."
Veteran
I'd recommend at least a 6" fan and scrubber combo. Somewhere in the 300ish on up CFM range. It's always easier to dial down an exhaust fan that is too big, than get more out of a fan that is too small.

Oh yeah, that vinegar and baking soda bs isn't worth the time and effort. Get an exhaust fan, and hook it up properly, otherwise your grow career is about to come to a screeching halt!
 

dgr

Member
A6D9,
I recommend you start a new profile and repost your problem. Then lie your ass off about adequate air exchange. Some of these stoners are giving you terrible advice and sending you off on a wild goose chase. There's a little bit of sarcasm there.

He has a few plants under a 400W in a PAPER tent in an unfinished basement. His statement that he doesn't go down there when it's lights off suggests that his tent isn't light-tight which means it isn't likely air-tight either.

IF, IF, you had a CO2 deficit, your plant growth would stall. Here is a test for you. Take a decent cutting off your plant. Trim it like you were going to clone it and put it in a glass of water. Put that in your tent as far away from the light as you can. Under your plants would be great. It will perk up. And it will do so with the same air supply that the plants have. Actually, scratch that. You've already performed the test with your Afghani clone. Did it wilt immediately? Nope. Same air. Maybe someone will come along and tell us that Afghani's are better at photosynthesis so they don't need as much CO2. :laughing:

Honestly, there isn't enough information to provide a definitive answer. Based only on the info you've provided and my guess that you have yet to successfully grow this weed, in all likelihood, you are drowning your plants. What do your roots look like? Are they white and healthy looking? Is there any sort of sliminess to them? When you up-potted your plants, was there any loose soil that fell off the ball? If there was, you transplanted too soon. What does the soil smell like? It should smell like it just came out of the bag. It should be sweet and earthy, not sour. If your plants are taking weeks to use the water in the pot, there is clearly a mismatch between the size of the plant/rootball and the pot which is compounded by a high humidity level in your basement. The plants will transpire less in high humidity so it takes longer for the plant to dry the pot. How much did you increase pot size? 1 gallon to 2 gallon with a full root ball is good. 1 gallon to 5 gallon with a half formed rootball is bad. If the pots don't get near to dry, the plant has no need to send roots out to find that water. If the pots don't get dry in a reasonable amount of time, the oxygen in the soil goes away and you have an anaerobic condition which is exactly what you don't want.


It may be terminal.

How to fix it? I don't know the best solution. If your roots mass isn't large enough to support the plant, the only solution is to increase the root mass or reduce the plant size. If they were still in veg I'd pull them, trim back to a solid root mass, pot into appropriately size container with fresh soil, put them away from the light for 24 hours and then trim the plant back enough so that it quits wilting if reintroduction to the light causes wilting.

The problem is, you are in flower. The plant isn't going to put out new roots. You may have to ponder revegging them. A cleaning of the root mass and a re-pot into an appropriate sized container may save them. May kill them or completely stall development, too.

Why does it happen in flower? Likely a couple reasons. You up-potted immediately before putting into flower. About the same time the stretch slows down, the roots also quit growing. If you were creating the same conditions during vegetative growth, the plants may have been able to keep putting new roots out to replace the ones that are rotting off. It could also simply be timing. If you had continued to veg, maybe the plants would have eventually exhibited the same symptoms. An anaerobic condition will ruin your pH over time and cause all sorts of issues.

If you are bound and determined to overwater your plants, maybe you should look into coco, hempy buckets or hydro. Hempy buckets are pretty fool proof as all the extra water you pour in will run out. Coco is a little harder to overwater as it entrains air better than soiless mixes although I've managed to over water it. Hydro gets around the anaerobic problem with oxygen addition through bubblers, solution movement or frequent replacing of oxygen starved solution.

I really do wish you success in your endeavors. I hate to see a medical grower simply trying to supply him/herself and failing.

P.S. The fan boys in this thread are accidentally giving you some advice that may help. More air movement will help speed transpiration of water out of the plant and help evaporate water from the surface of the pot. But, oscillating fans are going to do that more so than exhaust fans.
 

A6D9

Member
thanx for the great advice. i turned on the dehumidiafyer in the basement and irt seams to help a bit..tested the ph it was between 6.2 and 6.4

but now it is really starting to wilt more and dry up...the leaves are turning into dry and when i toucht hem they almost crackle and fall apart they are so dry..but the doil is still damp/wet.

and yes my tent is far far far from air tight....it's simpyl paper overlaping paper...but it is light proof...i have tested this.

my 400 watt hps is in the ceiling rafters floor joice whatever you want to call it..and bellow it..and bove that has no sealing at all so the air moves freely.

the root questions..makes me wonder....it's in a 5 galow pot...and well my first 2 plants were a good 3-4 feet tall....but the new fganie clone is only about 2 feet hight and very very very bushy ...hence hwy i do not want to lose her....I'm tempted to revegg her as she is not showing any flower...they never do..always dry up and die....:(

yes this is my 1st tiem...and it is for medical...and not lookign good,.

i appreciate any and all help anyone has to offer.

if anyone has any questions to get more info please feel free to ask.

I'll try my best to help you help me....:)
 

DiscoBiscuit

weed fiend
Veteran
The fan boys in this thread are accidentally giving you some advice that may help. More air movement will help speed transpiration of water out of the plant and help evaporate water from the surface of the pot. But, oscillating fans are going to do that more so than exhaust fans.

The water boy:) assumes you're over watering.

Container plants like wet/dry (not completely dry) better than constantly moist.

Pick up the pot and gauge moisture content by the weight. Don't water until needed. 5 gal buckets aren't too big for 3 and 4 foot plants, even a 2 ft bush. You either have to have drain holes or know how much to water and no more.

Like Major already said, less the exhaust fan you're just moving air, not supplying your plants with C02.

I'm surprised dgr underestimates your need for an exhaust fan. If your partition is sealed, 30 circ fans won't increase your C02 level.

Take a look at Major's grow and see if it looks like he's doing something "accidental", lol.
 

A6D9

Member
that's the thing my partition is far from sealed. so much that after last week..i actualy put a desk fan on the floor and blew it towards the crack in the paper and it opens up and i can see in and out easaly...that is 1 seam of the paper...not sealed at all....

would over water create the leaves to dry out tho?

I'll try to dry it out...but i'm out of ideas and this plant is starting to get very dry the leaves part....i mean it almost crumbles now..still green..but gettign to the point that in a bit it will start to crumble and I"ll lsoe it all like the others :(
 

DiscoBiscuit

weed fiend
Veteran
that's the thing my partition is far from sealed. so much that after last week..i actualy put a desk fan on the floor and blew it towards the crack in the paper and it opens up and i can see in and out easaly...that is 1 seam of the paper...not sealed at all....

If it's not sealed at all, how is it that no light is leaking? Lets forget "sealed" and focus on air flow. You either have it or you don't. Air "flow" usually consists of intake and exhaust.

Take a look at grow tents, they're replete with intake flaps and exhaust fan socks. Growers still have to use exhaust fans unless they're sealed and supplemented with C02. This often requires air conditioning to cool the lights.

would over water create the leaves to dry out tho?
Depends on the condition of your roots. Over watered leaves usually droop, (they don't get crunchy.) Your plants are no longer taking up water.

Changing your environment between veg and flower may mean your transpiration levels change. This may mean instead of watering every third or fourth day, (or whatever you did to get 4 ft plants) you instead judge the conditions before watering.

I'll try to dry it out...but i'm out of ideas and this plant is starting to get very dry the leaves part....i mean it almost crumbles now..still green..but gettign to the point that in a bit it will start to crumble and I"ll lsoe it all like the others :(
I hope I'm wrong but your plants may be beyond recovery. If the leaves are getting crunchy, the roots are no longer absorbing water. Your medium won't dry out [if] in this condition.
 

A6D9

Member
i do thank you for your advice....it is light sealed....as it't liek a tent inside a dark room.

as for drying....I'm going to try to dry it even more..and wait..but I"m pretty sure you are right and it's dead...i was told if it is still green it is good..and so far the colour is still very nice..just very droopy and crunchy..it's worth a shot to save her...just need to figure out why it;s doing this...:(

would any sort of bug infestation cause the plant to stop absorbing?

i mean i trasnplanted into a fresh pot of soil with only what was on the roote left behind and never waterd it..and it's seams to be gettign worse...:S
 

DiscoBiscuit

weed fiend
Veteran
You'll improve when you're more familiar with moisture content in 5 gal buckets. They're deep enough to retain high moisture well beneath an otherwise dry surface.

In the first post you mention well watered [then] no water after transplant. Any reason why you changed the watering interval post-transplant?

If your plants are several feet tall, you've probably got a pretty substantial root ball. Then you mention adding a tiny bit of water to make sure all is well. A plant several feet tall will need much more than a tiny bit of water, even after transplant.

Here's the rudimentary part. Know what a wet pot of medium weighs vs a drying pot. Notice I say "drying" because root mass may die if medium is completely dry. Get a bathroom scale if you need to get a reference. You won't have to pick up pots all the time, just to get a feel of how many days it takes for your plants to suck up the water. This is ever changing in the plants cycle so picking up the pot is the best way to judge how much water is in the medium.

All due respect to your friend, give the misting a break for the time being. IME, misting plants is only as good as water quality, additives, humidity and strain (transpiration rate). For those reasons, I rarely if ever mist plants at all.

When you get more familiar with your environment and the strains you're growing, mist might be just the thing that improves the process. You just have to isolate the "improvements" so you'll know what upsets the show.
 

A6D9

Member
when i say well water..i mean my home is on a well and not city water.

don;t know if i made that clear or not...

i guess i don;t follow what you are saying...it's like every single tiem i toss the plants in the flower room they do this....

I'm sure eventualy I"ll learn..no diff then cuttign clones..i must of cut a good 100 before i got any to take..but now i read more asked and am able to get about 50/50....but it's gettign better. all a learning process...I'm in NB Canada...so if i cann;t grow..I'll simply buy..it's cheap enought...but I'd prefer to have my own....just trying to learn as i go...

maybe i should simply ask ...what are all the causes to drooping and the plant not takign up water?

anyways it could be a bug? I don;t see any at all when i go look at it..but one can never be 100% sure.

if it is only over water..will it do that even in veg? or only in flower? coz my soil is the same wetness that it was in veg...

I really am trying to take pics to show you all. my plant is a good foot away from the light on a rack..and the rack has the plant at say chest height..under the plant is all open air. I do have a small fan now blowing air arou8nd the room...and another blowing towards a seam in the paper between the crack..i opend it a bit..to let more air mover about.

will try hard to get pics next on cycle for you all to see it.
 

A6D9

Member
frig..forgot to thank you all again for takign the tiem and tryign to help me..well yuo are helping me..just I seam to not graspi ng it still..:(
 

DiscoBiscuit

weed fiend
Veteran
when i say well water..i mean my home is on a well and not city water.

don;t know if i made that clear or not...

Amount, not source. If your well water is fine for veg, it should be fine for flower.

i guess i don;t follow what you are saying...it's like every single tiem i toss the plants in the flower room they do this....

I'm sure eventualy I"ll learn..no diff then cuttign clones..i must of cut a good 100 before i got any to take..but now i read more asked and am able to get about 50/50....but it's gettign better. all a learning process...I'm in NB Canada...so if i cann;t grow..I'll simply buy..it's cheap enought...but I'd prefer to have my own....just trying to learn as i go...

maybe i should simply ask ...what are all the causes to drooping and the plant not takign up water?
Here's what I gather from your posts...

"the soil is damp and waterd regularly..." - drying is the key

"soil is allways damp to the touch..." - drying is the key

"i try to water till wet and then let it dry till it is crumbly...but sometimes it tkaes forever...so i simply add a tiny bit to be sure all is well..."

Sounds like if you poured a cup of water in the top, a cup would run out the bottom.

"i did just replant before i put it in flower room...and never waterd it sicne then..." :chin:

"now to find a way to help dry the soil out....any ideas?" - stop watering:)

"i can water it with very little water and it stayes damp for at least 2-3 weeks before it even goes dry...."

"I'll measure tonight my solution...and find out...." - still adding more solution?

"would over water create the leaves to dry out tho? - if the roots are rotten, yes.

"i mean i trasnplanted into a fresh pot of soil with only what was on the roote left behind and never waterd it..."

With all due respect, that point seems to be left to interpretation.

Based on your posts, I think too much or too little water is your second problem. Your first challenge is knowing pot weight from water, well before your plants show visible signs of distress.

IMO, you'd do better judging the water content of your medium instead of the plant. If the roots are healthy your plant won't dry up. If your roots rot from water saturation, your plant will get crispy dry. Your roots have to get oxygen as well as hydrogen. Your roots only get oxygen as the medium dries out.

Think of it this way. You're drinking oj in a glass through a straw. However, the oj is being poured into the glass faster than you can suck it through the straw. Your plant is like the straw, it can only suck so fast.

You have to breath in between drinks of oj. Your roots have to breath between waterings.


anyways it could be a bug? I don;t see any at all when i go look at it..but one can never be 100% sure.
Inspect the root ball if possible. If a milkshake pours out of the bucket, you're watering too much.:)

if it is only over water..will it do that even in veg? or only in flower? coz my soil is the same wetness that it was in veg...
Try to replicate what you do in veg. You'll get some variation as transpiration increases with plant size, then decreases before harvest.

I really am trying to take pics to show you all. my plant is a good foot away from the light on a rack..and the rack has the plant at say chest height..under the plant is all open air. I do have a small fan now blowing air arou8nd the room...and another blowing towards a seam in the paper between the crack..i opend it a bit..to let more air mover about.

will try hard to get pics next on cycle for you all to see it.
Sorry to say but there aren't many indoor (partitioned) grows that substitute an exhaust fan with a 6" circ fan blowing through a crack. Check out the air flow threads in the equipment and design forum. Lots of good info there.
 

Stress_test

I'm always here when I'm not someplace else
Veteran
Hammerhead, BudGood, Zen Master, Maj.Cottonmouth, dgr, and DB, Kudos people...

You guys have far more patience than I.
I've been watching you guys beating your heads against the wall on this thread all week. If he still hasn't got em to uptake then he needs to get em out of there and into some fresh air for a few days. Hell I would have already dumped em out on the floor to air prune and dry, and I'll bet you all would have by now also.
I mean after nearly a month that plant is dead or damn close to it. My plants want watered every few days at most or I find out why.

I don't want to be a killjoy but I gotta be realistic too. From what I've read, the bottom line is that A6D9 needs to get a room set up someplace else. That damp stale basement is only going to produce moldy buds anyway, even if he gets em going again.

It could maybe be aired out and dried out and a room built and sealed up that would work but it would take all summer probably to do it right.

Also he should have give the plants a few days to establish in the new soil and pots before flipping flower.

I'd dump them wet bitches out for a day and re-pot em in damp soil, not wet, just moist. Probably add a bunch of perlite to the soil also and let some air get at the roots between watering.

I just don't have the room, time, or patience to dick around with lock out plants for weeks.

As for cloning, well I can show anybody how to clone successfully and consistently. Hit me up A6D9 and I'll get you going in a DYI tutorial on cloning when yer ready. Plan on spending some hard cash though cause it'll cost ya about $25. LOL

Sometimes "tough love" is the most efficient approach, but KISS always works.
picture.php

Keep It Simple Stoners.:laughing:
 

A6D9

Member
yes kudos is do to all of you...since evwery night i been opening the walls since i started to ask for help...and i have also put more fans in there...it is showing signs of improvement.

I actualy cut a hole in the side about 2 inchs fom the bottom of the pot...and put my finger in it to see how wet it was.

well i think i have overwaterd big time. it was liek a sponge that leaked when i compressed the soil....so since i have nothing to lose.

i have a compressor for mecanics work..charged it full of air...and put a pipe with all kinds of holes in it in that same hole and shot allot of compress aired in there to help dry it out....this morning when i got up...the plant is allready starting to perk a bit...and is still very green and lush.

I'm going to need to pay very close attention to my watering as it apears i do it way too much.

you know those little sticks you can put in the soil to say the moisture content..do they actualy work? I'm tempted to get one just so i can get a feel for how much water makes it moist as opposed to wet to damp?

once again i owe you all a very very big thank you...and if you lived close by..I'd offer you a bbq/smoke or anythign that i have sicne i am so grateful...

I"ll keep ya all updated on what is going on.
 

Stress_test

I'm always here when I'm not someplace else
Veteran
You can use another pot filled with dry dirt and weigh it. That is close to the weight your plants should be when they need watered. In a 1 gallon pot I add the 4 ounces, the weight of 1/2 cup of water. I don't water the pots until they are pretty close to weight.

You can also get a cheap moisture meter at Walmart for under $10. I checked em out and came to the conclusion that if they read above 1 they don't need water. About midway in the 1 box works okay but is still higher Rh that is ideal.

I'll get the brand name when my garden wakes up and post it here.
 

A6D9

Member
thanx again..that's awesoem advice..i know the cheap ones aren't the greatest of acuracy...but at least it'll tell me approx how long it takes to dry a bit more compared to other times....

when you all water...approx how much do you water? do you water till it coems out the bottom and then wait till it drys again?

or just a few cups at a time?
 

A6D9

Member
see that;s what i was doing..but i don;t think it EVER got dry..since the basement is so damp....going to find a way to dry it out better....might need to leave that pipe in there to help it dry and turn it on about 10 min every day....:)

coz if i waited till it dried on it;'s own....I'd never water it...
 

sso

Active member
Veteran
you should allow the containers to dry out enough that the plants wilts.

then you know the approximate timeframe you need to water in.

so you can catch them just before they wilt.

best to just lift the container and feel how heavy it is and then use that as a guideline.

sounds like you are killing them with overwatering and a humid environment allready.
 
Top