I,ve always gotten along just fine without a greenhouse. Recently I've found the need to wanting a greenhouse, cheap but also large that can at least hold up for a couple years or more.

Ive recently been looking into polyethylene cloth, (plastic with mesh). I was curious if this would last long enough and whether or not there is a spray that is uv protective for this kind of material. If so without damaging it, what brand has a good uv sun protectant?

1 Answer 1


Ive found the 303 formula from walmart has plastic protection and have looked into pe cloth also formidable to pp cloth. It is tear resistant and sun resistant for a good hope of 4 years. But its color im looking into could be negative, the kind I am looking at is green which can be negative in a neutral way. Some say plants will reflect green light. I say different, rays penetrate regardless, heat is a big factor and even if the color isnt white clear or red as people abide by, I beleive it to be suitable for my purposes. Further input on this material and a spray for better protecting it specific upon its material would be appreciated still,


  • How much are you paying per square foot? Actual greenhouse film with the proper treatments can be had for 11-12 cents. That's guaranteed for 4 years and often goes 6 or more.
    – Ecnerwal
    Commented Jun 22, 2017 at 3:05
  • I do believe the film is 6mm, it is preset for setup, as it is portable. The length is 20' by 10' wide and is only $169.99. So its Square footage would be, what? 200sq feet. Through Aosom it is mainly sold. I was reading that pe does come in 4mm which only last a couple years, there is no exact description of this product and happens to be no questionare for it. Though normal overlay is and should be 6mm thickness. Florida sun is brutal on my plants. So being that the green house in question happens to be green, which isnt the greatest, it shall keep them warm and safe still.
    – brandon
    Commented Jun 22, 2017 at 11:53
  • After a year I would like to have a protective spray for upkeep in order to make sure this cheapy greenhouse stays more well maintained. I dont know how many people bother with this kind of stuff, most Id assume will completely go balls out on it or go home. Lets say this is just a test for me, an experiment. Nessasary but not so so much. More like an interest.
    – brandon
    Commented Jun 22, 2017 at 11:57
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    So you are paying 85 cents a square foot for a product not actually suitable, rather than the 11-12 cents that the right product costs. And then you want to pay extra every year for some mythical spray on solution... ???
    – Ecnerwal
    Commented Jun 22, 2017 at 13:20
  • 1
    @Ecnerwal is right on. We used El Cheapo plastic last year just to last for the rest of the year. In 2 months the UV destroyed the south side of our greenhouse skin. Snow hit and it completely imploded. My perennials in the greenhouse had a tough time, I lost half of them...even EVEN mint!! We just purchased some good stuff and could only afford to do half, the south side until we can afford in a month or two for the North side. Went the extra mile by putting soft, thin insulation between the plastic and wood then on top of the plastic installed 'batten'. Wind movement won't deteriorate.
    – stormy
    Commented Jun 22, 2017 at 21:30

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