will my new four tier plastic greenhouse work same as a glass one?

Hi there,

i have just got a 4 tier mini greenhouse. type you get from argos homebase etc with the plastic cover and wondered if it will work the same way as a glass one?

i.e could i use a plug in heater in it for example? I need to look up greenhouse growing in general and what i can do but thought i would find ask.


many thanks



  • ClaringtonClarington Posts: 4,892

    I have a four tier one I brought from Aldi last year. It's holding up well although be careful to secure it to a wall or something firm as in high winds despite being full of plants mine disappeared up the garden.

    I can't see putting a heater in it to be a good idea at all. I imagine most of the heat would leak out the unseal bottom and I'd be worried about melting the plastic.


    They are very effective in their own right - I noticed a big difference with my tomatoes compared to ones I had grown in the garden.

  • hi there, i also have one of those and have found it to be fine. However, i did have to buy a replacement cover this year. i dont know about using a heater in them, maybe someone else could advise on that. Mine is situated behind another shed so is very sheltered as well,i dont think they could be in an exposed position, think they might blow away!.. hope this helps...P

  • Hi Polly, as a HS&E rep for my work, please do not use a heater of any description in plastic GH. Try and locate it on a south or west wall. The sun heats up the wall and radiates it back to the GH.  

  • i dont use a heater in mine!..as stated mine is very sheltered so no need. I wouldnt imagine anyone would put a heater in a plastic greenhouse anyway!..lol...P

  • FairygirlFairygirl Posts: 19,727

    They're not as substantial as a conventional greenhouse but are adequate for keeping the worst of the weather off things that aren't totally hardy. Just make sure you attach it securely to something- in an exposed location they take off ! Heaters would be a no no.

    I grow tomatoes in mine as we just don't get consistent enough temperatures at night up here for them.

  • filmbuffyfilmbuffy Posts: 77

    i dunno. i mean if its air circulated and in the top part where there is plenty of room between heater and top of plastic.

    mine is unfortunately against a fence as dont have many walls.

    arent you supposed to be able to grow things earlier in a greenhouse? does the same apply to plastic ones?

    and how do you stop snails getting in the bottom? I have had a thought of coverings the ends of the plastic with vaseline then sprinkling it with salt. wonder if that will work to stop them climbing up?

  • FairygirlFairygirl Posts: 19,727

    I think you still have to take account of the weather filmbuffy. They just don't give the same protection as the real thing in more severe cold.

    I made small holes in the back of mine and attached it with wire from the frame onto the fence after one disappeared across the garden last year! I didn't have too much bother with the giant snails I have here but they had quite a rough trek to get to the growhouse anyway as there's only fences and gravel around them for some distance! Perhaps the beer traps might be a better solution if you're plagued by slugs and snails.

  • ClaringtonClarington Posts: 4,892

    What are you hoping to grow in this plastic greenhouse? Fruits? Veggies? Where are you based

    I think if you explained why you need to be heating a plastic greenhouse we might be better able to understand and help you.

  • djjjukdjjjuk Posts: 212

    Sorry to hijack the thread a little - but does anyone have their tomatoes in one of these now? i have tomatoes on the windowsill still. i have a thermometer ive put inside the plastic growhouse and early morning it seems to be dipping below 10c - too cold? i do have a fleece cover, which i could use at night and take off in the mornings.

  • filmbuffyfilmbuffy Posts: 77

    erm. i asked about the heater as i know people use them to keep the temperature up when its cold outside for their greenhouse plants.

    as i dont have much space on window sill etc. mainly be used to grow on seeds. mainly fruit/ veg i guess but also some flowers.

    really want to see if i can grow things at a time when you cant grow things outside.

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