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plastic for hoop
+2
quiltbea
Errol
6 posters
Page 1 of 1
plastic for hoop
several replies to my question on hoops yesterday was really great information. I got my PVC pipes this am , but I was also wondering about the plastic covering. I have some 6mm clear plastic, but I also have quiet abit of 6mm black plastic left from another project. Seems the black 6mm plastic would keep the plants warmer in colder weather than the clear, what do any of you think? what would be the difference? Maybe the clear would let the sun through better?
:?:
thanks
Errol
:?:
thanks
Errol
Errol-
Posts : 22
Join date : 2011-03-06
Age : 82
Location : middle tn., Beech Grove, z 7a
Re: plastic for hoop
The black will cut your sunshine to the plants themselves.
While it might heat up the soil a tiny bit, and that's very little, its made to prevent weed growth.
I'd use the clear. All plants need sunshine to grow.
While it might heat up the soil a tiny bit, and that's very little, its made to prevent weed growth.
I'd use the clear. All plants need sunshine to grow.
quiltbea-
Posts : 4712
Join date : 2010-03-21
Age : 82
Location : Southwestern Maine Zone 5A
Re: plastic for hoop
Depends on "when" you need it for. If you are cold enough where you need it to stay on during the day, then you need clear or opaque plastic for light penetration. If so, then deffo no black. All regular white plastic will filter out UV light somewhat unless its true specialty greenhouse plastic but that's not what you need if you are just looking to keep frost off the plants. In that case, black or white is fine. I used 4mm because it was cheaper. I thought i'd kick myself by not choosing 6mm but have been fine. However, I am in a climate with mild winters that only really "bite" for a week or two.
I agree with Quiltbea and go for clear. You may need to keep it on during the first few hours of the morning sunshine till temps warm up. Then you get the benefit of grow time with sunlight coming through.
I agree with Quiltbea and go for clear. You may need to keep it on during the first few hours of the morning sunshine till temps warm up. Then you get the benefit of grow time with sunlight coming through.
staf74-
Posts : 554
Join date : 2010-11-24
Age : 49
Location : York, SC
Re: plastic for hoop
I only skimmed the other posts.
I, however, would suggest you only use the black plastic for warming the soil temps. I would lay it over my raised bed, anchor it with bricks, and leave it for a couple weeks. That will bring up your soil temps a good bit.
Then, when you decide to plant, you take away the black and store it for next spring. The clear allows the light in to the plants. No way your plants grow when using black with plants inside. And, remember, the thicker the plastic, the better the insulation.....but the more sunlight it cuts. It's definitely a balancing act. 6mm is the thickest I've heard being used.
I, however, would suggest you only use the black plastic for warming the soil temps. I would lay it over my raised bed, anchor it with bricks, and leave it for a couple weeks. That will bring up your soil temps a good bit.
Then, when you decide to plant, you take away the black and store it for next spring. The clear allows the light in to the plants. No way your plants grow when using black with plants inside. And, remember, the thicker the plastic, the better the insulation.....but the more sunlight it cuts. It's definitely a balancing act. 6mm is the thickest I've heard being used.
BackyardBirdGardner-
Posts : 2727
Join date : 2010-12-25
Age : 50
Location : St. Louis, MO
Re: plastic for hoop
thanks everyone for the suggestions. Well, since I am new to sfg, I went into town today (books a million) and bought myself the newest edition on SFG !! between the book, and you guys and gals on the forum, maybe I can get something to grow!!
thank you everyone
Errol![I love you](https://2img.net/i/fa/i/smiles/herz.png)
thank you everyone
Errol
![I love you](https://2img.net/i/fa/i/smiles/herz.png)
Errol-
Posts : 22
Join date : 2011-03-06
Age : 82
Location : middle tn., Beech Grove, z 7a
Re: plastic for hoop
Staf74 - I'm glad to hear that 4 mil has worked for you. I have nine hoop houses built and I've been debating between 4 mil and 6 mil clear plastic sheeting... but I couldn't find any mention of people's real experience. Thanks!
Clayton-
Posts : 8
Join date : 2010-03-22
Location : Atlanta, Georgia
Re: plastic for hoop
Clayton,
I'm sure you'd be fine in ATL with 4mil. I'm in the Upper Piedmont area SC, a little closer than you perhaps to the foothills and so we get that week or two of nightly teens but other than that we are relatively mild. Have you followed the Hoop House, please solve" thread? Lots of good info there too![Very Happy](https://2img.net/i/fa/i/smiles/icon_biggrin.png)
Camprn, however, will probably need 6 mil for sure up in Keene. Having lived in Boston for 7 years, I can remember how brutal it can get. Teens and single digits for HIGHS for days on end are the stuff of nightmares for me now. I hope that does not offend our northern friends but its just that I have to laugh when 30's for January highs ensure the local weather stations emblazon the over-sized graphic of "COLD" over the whole region. We are normally in the 40's even low 50's for normal daytime temps for the worst of winter.....
and the THREAT of snow....OMG. That's entirely another story....
I'm sure you'd be fine in ATL with 4mil. I'm in the Upper Piedmont area SC, a little closer than you perhaps to the foothills and so we get that week or two of nightly teens but other than that we are relatively mild. Have you followed the Hoop House, please solve" thread? Lots of good info there too
![Very Happy](https://2img.net/i/fa/i/smiles/icon_biggrin.png)
Camprn, however, will probably need 6 mil for sure up in Keene. Having lived in Boston for 7 years, I can remember how brutal it can get. Teens and single digits for HIGHS for days on end are the stuff of nightmares for me now. I hope that does not offend our northern friends but its just that I have to laugh when 30's for January highs ensure the local weather stations emblazon the over-sized graphic of "COLD" over the whole region. We are normally in the 40's even low 50's for normal daytime temps for the worst of winter.....
and the THREAT of snow....OMG. That's entirely another story....
staf74-
Posts : 554
Join date : 2010-11-24
Age : 49
Location : York, SC
Re: plastic for hoop
Staf74 - That's my inclination as well. Camprn, I'm curious about your reasoning. Is it for increased insulation? Or mostly for increased durability - - and presumably because of the snow load...
Staf74, I have been following that thread. Lots of great information indeed. My floating covers arrived earlier this week. I also just today found out that my free/cheap source of plastic sheeting is a no-go. So I'm going to be ordering a 100' roll shortly.
Staf74, I have been following that thread. Lots of great information indeed. My floating covers arrived earlier this week. I also just today found out that my free/cheap source of plastic sheeting is a no-go. So I'm going to be ordering a 100' roll shortly.
Clayton-
Posts : 8
Join date : 2010-03-22
Location : Atlanta, Georgia
Re: plastic for hoop
Precisely, I may have gotten another 2 weeks out of the hoop last fall but the snow just did it in. And a few too many things went through the 4 mil with ease.Clayton wrote: Camprn, I'm curious about your reasoning. Is it for increased insulation? Or mostly for increased durability - - and presumably because of the snow load...
Re: plastic for hoop
The difference between 3.5mm (4mm rounded) and 6mm plastic was wind. I am not sure how much more heat the 6 mil holds in....pretty negligible imo....but I definitely noticed instant durability with the increase.
A normal "breezy" day for us here in STL is gusts to 20mph....lol. And, days calmer than that were blowing my plastic out from under it's brick anchors. The 6 mil has handled some stormy conditions and 50mph gusts without a hint of a problem....so far.
A normal "breezy" day for us here in STL is gusts to 20mph....lol. And, days calmer than that were blowing my plastic out from under it's brick anchors. The 6 mil has handled some stormy conditions and 50mph gusts without a hint of a problem....so far.
BackyardBirdGardner-
Posts : 2727
Join date : 2010-12-25
Age : 50
Location : St. Louis, MO
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