Quote:
Originally Posted by designshark
How about the reflectors on the inside north wall of the greenhouse? The horizontal part of the wall. Would that make any difference I wonder?
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Yes, reflectors are often put on the inside of the north (vertical) wall in solar greenhouses. I use them there, too. The majority of light that hits the interior of the north wall is heading downward and therefore tends to create a really hot/bright patch where the light is deflected down onto the floor (since that patch gets hit with light from 2 sources--the light that's naturally hitting it + the light that is being bounced off the back wall down onto it).
The bright patch can be a great place to grow things that want a lot of light (fruiting zucchini and tomatoes, for example), but it's possible to overdo it and cook young plants in that zone.