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Grow Station - The Beginning

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Re: Grow Station - The Beginning

Post  elliephant on 3/2/2011, 8:52 am

In searching around for mulching ideas for my area I came across the idea of using mylar for sheet mulching in hot areas. Anyone else heard of/tried that?

ETA: What I read suggested that the reflected light from mylar will NOT add warmth...off to Google some more now to try to figure out which is right.

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Re: Grow Station - The Beginning

Post  cautery on 3/2/2011, 9:16 am

@elliephant wrote:In searching around for mulching ideas for my area I came across the idea of using mylar for sheet mulching in hot areas. Anyone else heard of/tried that?

ETA: What I read suggested that the reflected light from mylar will NOT add warmth...off to Google some more now to try to figure out which is right.

Heat transfer to the plant generally happens through conduction, and is greatly increased when that conduction is done via the soil... and is greatly enhanced by having a significant percentage of water in the soil (SH of water is 1.0).

Using Mylar to stop the heat source (sun) from warming the soil via radiation and thence to the plant via conduction through the soil should dramatically reduce the heat transfer.

Additionally, the impermeable layer of Mylar will reduce the moisture loss in the growing medium, by 1) reducing the evap rate, and 2) by providing a relatively cooler surface to encourage condensation on the under-side.

The mulching effect of the Mylar may be (marginally? significantly?) increased by providing an air-gap between the film and the growing medium (thus reducing conductivity losses).

Bottom Line and beyond the pseudo-scientific gobbledy-gook.... Yes, using Mylar should help in hot, low humidity environs... Wink

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Re: Grow Station - The Beginning

Post  Odd Duck on 3/2/2011, 11:12 am

Mylar is also supposed to help prevent spider mites and aphids since it reflects light up under the leaves and those pests don't like that.

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Re: Grow Station - The Beginning

Post  elliephant on 3/2/2011, 11:53 am



I like what I'm hearing! Definitely going to try it on a couple of beds. We do have some humidity, though, but I'm willing to do some experimenting to see if it still works. Aphids were a major problem on my peppers and I've got a 3x3 bed of all peppers out front that would be a good one to try it on.

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Re: Grow Station - The Beginning

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