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Old 09-14-2016, 07:54 PM
Status: "Elect a clown- expect a circus!" (set 13 days ago)
 
Location: Chapel Hill, N.C.
35,752 posts, read 35,205,231 times
Reputation: 45013

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Is there such a thing as a small patio-sized collapsible greenhouse so I can overwinter some porch plants? Not looking for a cold frame but something I will only need for 3 or 4 months. I've found lots of small hobby greenhouses but nothing which touts being able to take it down and put it back up every year.
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Old 09-14-2016, 08:07 PM
 
Location: East of Seattle since 1992, originally from SF Bay Area
24,020 posts, read 40,536,178 times
Reputation: 20895
Yes, I have one though it's getting pretty worn after 5 years, from Harbor Freight. I only see the $89 6'x8' now, but this was under $30 and just 2'x3'. Something like this:


https://jet.com/product/detail/2d10e...Q&gclsrc=aw.ds
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Old 09-14-2016, 10:05 PM
 
Location: Austin, Texas
163 posts, read 67,010 times
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I had the 6x8 one a couple of years ago for overwintering plants and the blasted squirrels chewed through the roof. It was a pain to put together but i think the smaller one would be the ticket. Big Lots is where I got mine, but probably wrong time of year to get it there now.
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Old 09-15-2016, 04:34 AM
 
Location: Former LI'er Now a Rehoboth Beach Bunny
5,825 posts, read 7,329,569 times
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Quote:
Originally Posted by Austin-HomeGirl View Post
I had the 6x8 one a couple of years ago for overwintering plants and the blasted squirrels chewed through the roof. It was a pain to put together but i think the smaller one would be the ticket. Big Lots is where I got mine, but probably wrong time of year to get it there now.
My sister and this one and it fit the ticket for her. The said she didn't have acres of plants.
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Old 09-15-2016, 05:21 AM
Status: "Elect a clown- expect a circus!" (set 13 days ago)
 
Location: Chapel Hill, N.C.
35,752 posts, read 35,205,231 times
Reputation: 45013
Thank you so much for your link and recommendations. I had never been to that site and had fun wandering around. I found this walk-in style https://jet.com/product/Ogrow-Deluxe...7e2be01add3712

which might give me the room I need for airplane plants, ferns, begonias, etc. I can contact the manufacturer of both kinds to find out how sturdy and easy they are to reassemble. But since they are called portable, I'm thinking that is exactly what they are for.

Any other recommendations are welcome.
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Old 09-15-2016, 05:31 AM
 
Location: Old Hippie Heaven
11,342 posts, read 4,187,084 times
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Which plants do you want to overwinter? These small patio greenhouses won't stay any warmer than ambient temperature at night without additional heat.

In my climate, I use them to overwinter plants which can't take the winter wet here, but are otherwise hardy (agastache, for instance), and to start hardy perennial seeds. Frost-tender plants spend the winter inside with me.

I have an earlier version of this one - http://www.shelterlogic.com/shop/gre...ard-greenhouse - and have been pleased with its quality. No tools required to put it up.

I also have one of these - http://www.flowerhouses.com/6-5-x-4-...ouse-pro-x-up/
It's OK for what it is, but the build quality isn't nearly as good as the ShelterLogic.

Last edited by jacqueg; 09-15-2016 at 05:51 AM..
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Old 09-15-2016, 08:10 AM
 
2,459 posts, read 1,032,674 times
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Hmmm, this thread is giving me ideas.
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Old 09-15-2016, 11:04 AM
 
Location: Somewhere in northern Alabama
14,866 posts, read 44,226,886 times
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Quote:
Originally Posted by jacqueg View Post
Which plants do you want to overwinter? These small patio greenhouses won't stay any warmer than ambient temperature at night without additional heat.

In my climate, I use them to overwinter plants which can't take the winter wet here, but are otherwise hardy (agastache, for instance), and to start hardy perennial seeds. Frost-tender plants spend the winter inside with me.

I have an earlier version of this one - GrowIT® Backyard Greenhouse - Greenhouses - and have been pleased with its quality. No tools required to put it up.

I also have one of these - 6.5' x 4.5' x 6' HarvestHouse Pro X-Up - FlowerHouse
It's OK for what it is, but the build quality isn't nearly as good as the ShelterLogic.
^^^ This.

There is a huge misconception about greenhouses - I had it myself until reality slapped my face - They are NOT good for overwintering plants without some serious additions and modifications.

On a sunny slightly warm day midwinter, they can bring plants up to temperatures that will confuse them out of dormancy. On clear midwinter cold nights, they get astoundingly cold. Compared to the MASSIVE heat loss or gain through the plastic or glass, there is only a tiny amount of thermal mass.

Overwintering plants in a garage or unheated basement - or even a sheltered carport - can be safer and more effective. If you are a dedicated plant enthusiast, a conservatory room might be an answer.

If you factor the cost of the greenhouse, additional heating and labor, and the relatively short life of many of them and the percentage of plants lost, in many cases you would spend less renting a trailer and driving your plants to a vacation spot in Florida for the winter.

I wouldn't be so strong about this, except it might save a few people from huge disappointments.
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Old 09-16-2016, 01:07 PM
 
Location: East of Seattle since 1992, originally from SF Bay Area
24,020 posts, read 40,536,178 times
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I found that mine will be about 3-4 degrees warmer than the outside air if closed up, and as much as 10 if I cover it with a blanket before dark. Because I have some semi-tropical bonsai in it, I also have a heater for mine when it gets just above freezing. For overwintering things like Geraniums and Fuchsias, I use the unheated garage.
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Old 09-16-2016, 04:15 PM
Status: "Elect a clown- expect a circus!" (set 13 days ago)
 
Location: Chapel Hill, N.C.
35,752 posts, read 35,205,231 times
Reputation: 45013
Quote:
Originally Posted by Hemlock140 View Post
I found that mine will be about 3-4 degrees warmer than the outside air if closed up, and as much as 10 if I cover it with a blanket before dark. Because I have some semi-tropical bonsai in it, I also have a heater for mine when it gets just above freezing. For overwintering things like Geraniums and Fuchsias, I use the unheated garage.
what kind of greenhouse and heater? Is it permanent? Here in N.C. we don't get really cold (freezing or below )days in the winter but we do get some bad nights.
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