Heating a mini greenhouse

Discussion in 'Greenhouse Growing' started by Adam Moran, Apr 27, 2009.

  1. Adam Moran

    Adam Moran Gardener

    Joined:
    Jul 6, 2008
    Messages:
    198
    Ratings:
    +0
    Ok, i've been thinking about this for a while (not too deeply mind you!)

    Ive seen the parafin heaters you can buy for the bigger glass greenhouses but i dont have one of those (yet!) just a couple of the mini plastic ones.

    With the colder nights with us for the moment i was wondering if putting a long burning candle inside would help keep the temp slighly higher?

    I've never tried this but i know putting a candle in our bathroom in the winter months does make a difference (or is it in my head? um.... lol)

    Anyway your thoughts are most welcome :thumb:

    Adam
     
  2. Kristen

    Kristen Under gardener

    Joined:
    Jul 22, 2006
    Messages:
    17,534
    Gender:
    Male
    Location:
    Suffolk, UK
    Ratings:
    +12,669
    If you can get electricity to the greenhouse a high wattage bulb in a biscuit tin (with ventilation holes) will keep the chill off. Low-wattage-long-life-bulbs are NOT an advantage :)

    I don't like paraffin - too much condensation

    My opinion is : Candles will use up oxygen and give very little heat - but that opinion is worth precisely what you paid for it!
     
  3. JWK

    JWK Gardener Staff Member

    Joined:
    Jun 3, 2008
    Messages:
    33,053
    Gender:
    Male
    Location:
    Surrey
    Ratings:
    +51,730
    Electricity is preferable, I'm using a couple of small heated propogaters inside a bigger coldframe to keep some of my plants snug at the moment, it just raises the temp by about 5 degs - although tonight I'm watching the temps plummiting, I might be going outside soon to cover up my spuds as it looks like there will be a frost.
     
  4. JWK

    JWK Gardener Staff Member

    Joined:
    Jun 3, 2008
    Messages:
    33,053
    Gender:
    Male
    Location:
    Surrey
    Ratings:
    +51,730
    Just popped out and covered my spuds, its a really clear night and there will be a ground frost later.
     
  5. Adam Moran

    Adam Moran Gardener

    Joined:
    Jul 6, 2008
    Messages:
    198
    Ratings:
    +0
    I would go down the "leccy" route but its not an option for me.

    We live upstairs and the mini greehouses are down stairs.. funny that isnt it lol But its not an option.

    I have a digital temp and humidity termo so i'll give it a go. I'll stick it in tomorrow and see how i get on.
     
  6. Adam Moran

    Adam Moran Gardener

    Joined:
    Jul 6, 2008
    Messages:
    198
    Ratings:
    +0
    I covered my salad leafs and pumkins with fleece and ive earthed up most of my tates but ive hurt my back :( so the main crops are showing, hope they will be ok
     
  7. Kristen

    Kristen Under gardener

    Joined:
    Jul 22, 2006
    Messages:
    17,534
    Gender:
    Male
    Location:
    Suffolk, UK
    Ratings:
    +12,669
    "Just popped out and covered my spuds, its a really clear night and there will be a ground frost later"

    Looking at Wunderground looks like your area was down to -1 ~ -3 ... I think we got away with +2 - which is good because I forgot to cover my Spuds - haven't been out to check yet though
     
  8. JWK

    JWK Gardener Staff Member

    Joined:
    Jun 3, 2008
    Messages:
    33,053
    Gender:
    Male
    Location:
    Surrey
    Ratings:
    +51,730
    Yes there was a slight frost - my greenhouse got down to 1 deg, so I'm glad I went and earthed up, although in the dark I missed one or two spuds. Adam I think that if your spuds did get hit by this slight frost they will recover.
     
  9. JWK

    JWK Gardener Staff Member

    Joined:
    Jun 3, 2008
    Messages:
    33,053
    Gender:
    Male
    Location:
    Surrey
    Ratings:
    +51,730
    If electric isn't an option then I'd try a very small parafin light, there are issues with parafin like condensation and fumes, plus it not controllable and exspensive. One of those very small parafin lights might last the night rather than a parafin heater (which might be a bit much for a mini greenhouse) - I should imagine a small parafin light will work out cheaper and better at heating than candles, except that you will need to buy a parafin light to start with.
     
  10. Kristen

    Kristen Under gardener

    Joined:
    Jul 22, 2006
    Messages:
    17,534
    Gender:
    Male
    Location:
    Suffolk, UK
    Ratings:
    +12,669
    What about those camping gas lights - do they chuck out any heat? (Although may be a very expensive fuel source??)
     
  11. Garry

    Garry Apprentice Gardener

    Joined:
    Apr 14, 2009
    Messages:
    17
    Ratings:
    +0
    I am not sure if this is true, but apparently the temperature immediatly next to a house wall can be a couple of degrees warmer. I have one of those small plastic greenhouses and have moved ours next to the wall. Everything seems ok inside, so I don't know if this has made a difference or not, might be worth a try.
     
Loading...

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice