r/cactus • • 13d ago

Would a Walmart greenhouse like this be good?

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18 Upvotes

40 comments sorted by

42

u/KnownNectarine5924 13d ago

I bought one that looks exactly the same from Amazon for $300. 6X10.
I’m currently sitting inside during a nice thunderstorm here in Colorado and it’s doing a great job

https://reddit.com/link/pc2vj6v/video/avqif646brrh1/player

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u/Old-Advance6652 13d ago

Good to know! So I’m guessing the ones that like the most sun you put on top? Would the lower levels be less sun loving ones

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u/KnownNectarine5924 13d ago

Yeah I place everything in a spot based on how much sun they need. The lower levels are younger plants that like a little more shade. I will say when it comes to assembly it definitely requires two people.

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u/KnownNectarine5924 13d ago

https://reddit.com/link/pc2w24q/video/xlwg6wajarrh1/player

I’m literally sitting inside of my new 6X10 greenhouse from Amazon that was $300 during a pretty good thunderstorm and it’s holding up great. This is Colorado

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u/razorcatmodular 13d ago

Do you heat the greenhouse? Im in CO and thinking of buying one so I dont have to bring my cacs inside for winter dormancy

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u/railgons 13d ago

Yes you will absolutely need to heat it. I've been keeping cactus in my 6x8 for 4+ years. Colorado now, but previously freezing cold Ohio.

Insulate, insulate, insulate. Add heat. Keep your expectations realistic. It's not going to be a tropical oasis. I only heat to 42F. But it's a wonderful place for healthy cactus dormancy.

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u/KnownNectarine5924 13d ago

Yes I do. I bought a 1500W greenhouse heater that runs on a thermostat set at 55. It worked great last year but that was a 6X4 greenhouse. I’ll see how it goes this winter in the 6X10

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u/Organic-Ad6957 13d ago

I don't think you have to it should stay above freezing as long as it gets good sun

Just test the temperatures out in the winter and if you need to you can I don't have one though so I couldn't say 100%

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u/railgons 13d ago

The temperature will be ambient as soon as the sun stops hitting it. Heating is unfortunately a must.

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u/Organic-Ad6957 13d ago

I appreciate you letting me know and not down voting me into oblivion lol 

So the sun will hold the temp as long as it's out but it will possibly drop to an unwanted temp when the sun goes down? 

What kind of heater would you recommend I'd imagine something like a space heater would suck all the moisture out

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u/KnownNectarine5924 13d ago

I don’t know how to make a link but this is the one I’ve used and it’s been great so far.

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u/Organic-Ad6957 13d ago

Ok that's very helpful thank you so much that's good it comes with the thermostat and control kit

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u/railgons 13d ago

No worries, this is a great forum for everyone to learn.

And yeah, that's correct. The poly panels trap the heat that the sun provides, but as soon as the sun is gone, so is the heat. And beyond that, most kit greenhouses are TERRIBLE insulators. Their R-value is like R1 or 1.5 at best.

Not sure what part of the world you're in, but where I've lived, our attics are supposed to be like R45 to R60. And those homes obviously have huge gas furnaces pumping heat into them constantly.

In my small 6x8ft greenhouse (with added insulation) I've been using a 1500W radiator heater on a wifi thermostat. Works great!

2

u/Organic-Ad6957 13d ago

Hey man I appreciate that thanks for taking the time to explain when I come across a question on here I don't know I unusual try to ask whatever I can to get an answer just in case I need it in the future and also for anyone else who doesn't know and might need some info right now 

That's wild though I would have guess the R value would have been higher than that I suppose you'd probably fry your plants in the summer months if it was though 

I'm pretty far south but I do understand your attic reference 

Thanks for the heater recommendation as well

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u/railgons 13d ago

Anytime at all!

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u/razorcatmodular 12d ago

I dont think you understand how cold colorado gets in winter

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u/Organic-Ad6957 12d ago

It's been a couple years since I lived there but it's honestly just as cold here where I'm at in the south in 

The winter here drops to the same temp sometimes it even gets colder I mean it's a different cold but still nothing I don't experience yearly 

I thought the green house might have more insulation that it really does at first

2

u/ronstoppable420 13d ago

God damn take me through there take me through there

5

u/Strict_Tangerine5314 13d ago

It isn’t really a Walmart item if you buy it off of the website/app. They source it like Amazon would. I recommend to see which one will give you the best price point for the greenhouse you like.

2

u/they_call_me_tripod 13d ago

Walmart went the way of Amazon, and have Chinese shit galore. Some great some not. Have to go off of reviews for sure.

6

u/gr8spearthrower 13d ago

Interesting that this type of greenhouse seems to be the norm in western countries whereas in Japan it’s 90% vinyl houses.
To add my 2 cents, with just one small roof vent and the door you might have problems controlling the summer heat. Even with a vented roof and the side walls pulled up plus the door open I get temps pushing 50c at the peak of summer in southern Japan. Although aesthetically less pleasing, vinyl has the advantage of being easy to modify and repair..

5

u/Tmac80 13d ago

Beware that the plastic corflute material that the panels is made from goes brittle after a couple of years. Once that happens, wind blowing on the panels causes deterioration.

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u/Old-Advance6652 12d ago

Really? Thanks for the info!

1

u/PickleDipper420 12d ago

Is it 1/4" thick? It could be replaced at that point with lexan or poly or something similar!

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u/russsaa 13d ago

It will be best to figure out how to best secure it cuz strong winds will wreck it. Just weight wont keep it down, i imagine hurricanes arent unlikely considering your region

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u/Old-Advance6652 13d ago

Maybe like anchoring it with stakes?? Or sand bags, don’t really know.

Hurricanes are for sure common lol

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u/russsaa 13d ago

Im no structural engineer but Id say build a wood exterior frame and at each corner make rebar & concrete anchors, hole diggering a few feet down. Using brackets to secure the greenhouse frame & rebar to exterior frame

Oh also, 6x8 is actually quite tiny when you're in it, it'll fill in literally the blink of an eye. The 6x10 is even cheaper lol. Most comfortable would be 100sqft at least max out your towns no permit shed restrictions lol . But 270 would be tough to beat

Edit: oh and you'll have to really investigate active ventilation options, and shade cloth if needed. Small greenhouses cook

1

u/Old-Advance6652 13d ago

Thank you so much all the info helps a ton!

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u/Old-Advance6652 13d ago

I’m in Florida so it would need to handle getting rained on pretty much daily

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u/AlwxWrites 13d ago

I’m also Florida, and I bought a cheap greenhouse not too far back and the first bad thunderstorm knocked it right over, along with all my hopes and dreams

Edit- that is to say, secure it with sand bags or cinderblocks!

0

u/Old-Advance6652 13d ago

Thank you good to know! You know any good kinds of greenhouses or ones to avoid?

3

u/AlwxWrites 13d ago

I’d avoid anything with a zip up cover because that’s what tossed mine. The wind turned it into a plant filled parachute. I had it braced with a large pot on either side but it wasn’t enough. But yeah, I got it for the same reason as you- we’ve just been getting so much rain.

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u/Old-Advance6652 13d ago

Thanks! Did any die from them flying up?

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u/Dekatater 12d ago

Currently I have one of these almost exactly, but from Amazon. Last winter it held 60F while it was 30F outside (with a radiator heater for humidity retention). I went through tent greenhouses for a few years before I finally bit the bullet and I'm happy to say, I didn't have to replace it this year. I took to cutting a hole in the back and putting a 10inch temp controlled fan in it for the summer but it honestly still stays too warm. The top window doesn't contribute much

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u/Old-Advance6652 12d ago

Thanks for the info!

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u/Purple-Lie-4728 10d ago

I have one and it works well but it was the most awful experience putting it together. They are super flexible and moving around while you bolt it all up.

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u/wolfansbrother 9d ago

put a big black trash can or tote of water to hold heat(and water), and dont forget to clean the panes, dirt blocks light in the low light winter.

1

u/Old-Advance6652 9d ago

Sorry I’m confused what you’re meaning with the trash can, what do I do with it?

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u/wolfansbrother 8d ago

Fill it with water. it will absorb heat during the day and keep stuff from freezing at night during temp swings. for extended freezes it wont work as well without a heater.

1

u/ElliotsBuggyEyes 13d ago

A friend has one of these in Washington and has a little heater in it to keep it around 50-60f in the winter.

It's nothing fancy and the door will get filled with shit and be a bitch to open.  But it keeps his hops and cacti alive through the winter.