Water temp??

[Stone]

The addition of ammonia nitrogen may make the pH adjustment for you.

I'd probably stay with the standard fertilizer mix when conditions are cold and use the added ammonia when it is warm.

Agreed. You should restrict your Urea/ammonium use in winter. Or better still not feed anything unless you have lights and temps above say 23C during the day.

 

[gonewild]

I was lying in bed last night and it just popped into my head that I should've written ''F'' not C. Then I thought to myself ''I wonder who will pick up on that?''. Then I thought ''I bet Lance does'' :rollhappy:

:noangel:

 

[abax]

Just as an aside, might it much easier and better for the
plants to add additional light during overcast weather. Home constructed LED light fixtures are rather inexpensive
and really make a difference in growth and blooming during the winter months. I might add that more light
won't hurt your plants.

 

[abax]

Stone, I caught it too, but thought you might be heat
crazed. Better not to mention mental deterioration in
public. ;>)

 

[gonewild]

Stone, I caught it too, but thought you might be heat
crazed. Better not to mention mental deterioration in
public. ;>)

Isn't that already public knowledge?
:wink:

 

[Carper]

Just as an aside, might it much easier and better for the
plants to add additional light during overcast weather. Home constructed LED light fixtures are rather inexpensive
and really make a difference in growth and blooming during the winter months. I might add that more light
won't hurt your plants.

I only have supplemental lighting on a small area at present which is used for seedlings on a heat mat. I may consider doing the whole greenhouse at a later date.

Gary