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Best position for a vegetable patch
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from "Martin Sykes" contains these words: "Glen Able" wrote in message ... I still think the mirror has some benefit though - because the area of the mirror is greater than the area of the greehouse floor, it's getting more light into the greenhouse. I've drawn a diagram here : http://www.users.globalnet.co.uk/~sy...reenhouses.jpg In the standard greenhouse, some light just passes through without going near the plants. That doesn't make sense. To grow straight and evenly, plants need light all around, and that's what they get in a standard GH. The uneven light in a leanto GH makes seedlings lean to the lighter side, and necessitates turning the trays or pots. In the modified one on the right, the roof is asymetrical and internally mirrored on the side away from the sun so that that light gets redirected to the plants. I bet it wouldn't be an expensive modification and might make more of the little light we have. You could also mirror the vertical side as well. Maybe even tin-foil would do the job? The sun moves across the sky so doesn't always fall on the mirrors; when it doesn't, any potential benefit is lost. Meanwhile, the mirrors constantly reduce light from their dark side.The plants are alternately fried, and drawn. :-) Janet. |
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