Discussion forum for the various methods and structures used for getting an early start on your growing season, extending it for several weeks or even year 'round.
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#16 | |
Tomatovillian™
Join Date: Apr 2008
Location: California Central Valley
Posts: 2,542
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#17 |
Tomatovillian™
Join Date: Jan 2016
Location: central coastal Oregon
Posts: 6
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Ah, yeah, habitat, I can get lots of ventilation -too much right now, due to the giant rip down the top, but we tend to get more cloudy days than anything, so the greenhouse tends to get too warm very rarely. I still got lots more tomatoes, sugar snaps, shallots and cukes than we could eat, and we gave lots away, too. I think GH gardening works really well.
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#18 |
Tomatovillian™
Join Date: Jun 2012
Location: Illinois, zone 6
Posts: 8,407
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I actually got the idea from someone talking on a web forum about that being a practice out west. Since it is sunlight that degrades the plastic, I would think the mud would block the sun, and actually make it last longer...just a guess.
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#19 |
Tomatovillian™
Join Date: Oct 2014
Location: Norway
Posts: 1,049
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I thought I'd revisit this thread, because I've gained more experience, and I thought the following table would be of interest.
Illuminance Example 120,000 lux Brightest sunlight 111,000 lux Bright sunlight 20,000 lux Shade illuminated by entire clear blue sky, midday 1,000 - 2,000 lux Typical overcast day, midday 400 lux Sunrise or sunset on a clear day. <200 lux Extreme of darkest storm clouds, midday 40 lux Fully overcast, sunset/sunrise <1 lux Extreme of darkest storm clouds, sunset/rise I've provided more ventilation by converting fixed windows to hinged in the adjoining garage wall (back wall in the greenhouse). I use a fan, and 50% shade cloth. We've had a recent heat wave (for Norway), with temperatures up to 29*C (84*F). So far I've managed to keep the greenhouse temperature under 33*C (92*F). It's interesting to note that 50% of bright sunlight is still ca 30 times more than the lux value of an overcast day. Taking into account that the days here are now 18 hours long, and that the greenhouse gets ca 10 hours of direct sunlight, I'm sure my plants are getting plenty of light even though I use the shade cloth some of the time. Steve |
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