What temp would you set this to?

East Coast

East Coast

Well-Known Member
IMG_0145.JPG Inserted the temp probe into a r/w cube......what would you set the temperature to for growth of roots?
 
SnapsProvolone

SnapsProvolone

Well-Known Member
If using a heat mat under the cubes then 90f peak with probe between cube base and heat mat. The room would be around 80f.
 
East Coast

East Coast

Well-Known Member
SnapsProvolone said:
If using a heat mat under the cubes then 90f peak with probe between cube base and heat mat. The room would be around 80f.
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SnapsProvolone said:
Account for deadband.
Click to expand...

Heat mat placed under ribbed plastic tray which the clones sit on, so not directly on heat mat. I presume this 'deadband' is terminology speak for swing either side of set point?

90f is nearly 32c + swing of 0.5c, seems high for root zone temp to me? But thus is why I am posting in the newbie section.
 
SnapsProvolone

SnapsProvolone

Well-Known Member
Just passing on what I've had the best rooting rates with. Over 15 years.

I say 87-90f is where it's at. Slide the probe under the ribbed tray (between tray and mat)

I root like this in a 2X4 flood and drain tray under 250w HPS. The heat mat is placed in the tray, I plop several trays of rapid rooters in there, insert only, sans the boat bottom part lol. Set the tray to flood 1" deep twice daily. Set it and forget it. :)
 
SnapsProvolone

SnapsProvolone

Well-Known Member
Cut the ribbed bottom out of your trays, leave a rim around edges as tall as the humps on your ribs. it will hold water and you grow long bubble cloner type roots. ;)
 
East Coast

East Coast

Well-Known Member
SnapsProvolone said:
Cut the ribbed bottom out of your trays, leave a rim around edges as tall as the humps on your ribs. it will hold water and you grow long bubble cloner type roots. ;)
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I think the rockwool cubes and jiffy pads would not like the wet continual conditions?


SnapsProvolone said:
I say 87-90f is where it's at. Slide the probe under the ribbed tray (between tray and mat)
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So this is where the temperature difference comes in, here we are not sensing the temperature of the roots, but teh temperature of the air between tray and heating mat?

IMG_0149.JPG These are the ribs on the tray. I suppose because I have digital control over all my devices I could use a flat tray or even place directly onto the heating mat. But I like a bit of safety factor.

IMG_0152.JPG Digital control for the heat mat, mother and flowering rooms.

IMG_0146.JPG Pic of the temp probe placed into the r/wool cube and heating mat.

What I am trying to do is control directly the heat at the root zone, not the heat between heating mat and tray.

So Snaps, you still say 87-90f with this set up?
 
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East Coast

East Coast

Well-Known Member
I would prefer rockwool as I intend to go hydro in the near future. that is just an experiment to see which one sprouts first. I see you can use jiffys in flood and drain, just make the flood stop short of the jiffy pad etc.
 
SnapsProvolone

SnapsProvolone

Well-Known Member
Rapid Rooter plugs are best imo.

Your tray is thicker than mine. Play around with it, if anything I'd think the thicker tray with larger air gaps would insulate better. May have to put probe in the tray or turn it up a degree.
 
East Coast

East Coast

Well-Known Member
SnapsProvolone said:
Rapid Rooter plugs are best imo.
Your tray is thicker than mine. Play around with it, if anything I'd think the thicker tray with larger air gaps would insulate better. May have to put probe in the tray or turn it up a degree.
Click to expand...

I still don't understand, why play around with it, when I know the exact temperature of the root zone as outlined / shown above?

I still am trying to find out the desired / best temperature to have the root zone at..........not the temperature of the tray or air in between? OR have I missed something here Snaps?
 
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