temp issue

[gilly]

hey guys, just wondering where you have your temperature meter reading directly under the light the same position as the plants or do you have it say around the middle of your cupboard. reason being that when i have the temp meter directly under the light it reads around 29-30degrees but when i have it in the middle it reads 25-27 degrees which ideal so i was just wondering if i need more outake fans or not. the plants are still fairly small but are growing very well .

 

thanks.

Edited June 9, 2004 by gilly

[Lucian]

i have one at plant level , one above the light and one on the exhaust

 

 

Edit : i believe most people talk plant height temp , but some talk exhaust/overall temp

Edited June 9, 2004 by Lucian

[Luke Skywalker]

Plant canopy temp is most important IMHO, although information about the temperature at root level, in the nutrient tank(s) and the ambient atmosphere of the growroom, as well as intakes and outtakes as lucian has said, can be very useful pieces of information.

 

But yeah, I use a digi therm with a small sensor on a wire, so I can get good readings, highs and lows, of anywhere within the GR.

 

You don't want the canopy temps to reach above 30 if possible, although they will survive, and even grow at above these temps, it's not the best situation. So keep things between 22 and 28 if possible.

 

Good luck.

[Tom]

For many years I just used a cheap $2 mercury thermometer screwed to the wall of my grow room, if I could find a place that sells them I would do the same again.

 

[Lucian]

For many years I just used a cheap $2 mercury thermometer

 

theres are available at pet stores , they have a suction cup on them and that sticks to Panda /aluminium /plastic .

 

i have 3 of these , as well a small digital with a remote probe for the N00t tank

[gilly]

please explain plant canopy is that at the top of the plant ?

[Luke Skywalker]

Yes, the top area of the plant where the tops are exposed to the lights.

[Roadblock]

Hi

 

Its a good idea to make sure your thermometer is no getting radient heat from the lights , as you want to measure ambient temp within the canopy , just shade the gauge from direct light exsposure but still have it in the canopy area , a piece of folded cardboard works ok .

 

Rod

[Luke Skywalker]

Or a leaf.