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Polytunnel ventilation / watering

Hello,

I have just put up a 36 ft x 16 ft poly and am unsure about the ventilation it will need. It is a poly with rails (the plastic is attached to rails leaving about 4 inches gap to the floor all round). 

Should I leave it as is as will ventilate well in warmer months or should I build up the earth all around to keep the cold out?

Watering - I was thinking about using an electric drill pump/hose attachment and a handful of water butts to water as needed - it is an allotment so no electricity supply and I can't get down there every day unfortunately. Other ideas very much welcome!

Thanks!

Posts

  • It depends on what you are growing. Local farmers around here have poly tunnels as you describe with open bases and racks down the side for growing strawberries and other fruit. I used to have a poly tunnel a long time ago and grew cucs, toms, chillis, squashes and melons, but I grew them in raised beds down the sides of the tunnel to reduce watering needs - cucs in the shade of my grape vine and toms in the full sun. I needed some ventilation, but gaps at the bottom would have been a problem. I did grow a grape vine very successfully, by planting the root ball outside the tunnel and angling the main stem inside, up a support frame, then trained it down the centre of the roof. That reduced my watering needs a lot. 

  • I will (hopefully) be growing: melons, beans, lots of tomatoes, lots of chillis, aubergines, peppers, sweetcorn, herbs, some potatoes, strawberries, and anything else I can think of. I'm sure it'll fill up very quickly...

  • Hostafan1Hostafan1 Posts: 34,888

    Hi there.

    I have two tunnels. One is 56 feet by 21 ( old school measurements sorry) and has netting up to to 1m high in which I grow hardy stuff , eg herbaceous perennials.Even this tunnel can get HOT.

    The other is 48 x 21 and is all poly which gets unbelievably HOT. I've had to install a "window" on the back to let a flow of air through.

    I'm afraid it'll be trial and error and you need to expect a few casualties along the way.

     

    Devon.
  • bulkerbbulkerb Posts: 258

    its funny the garden I work at has just taken down the poly tunnel had to use a tractor to pull up the anchor pins I burnt the raised bed boards and have 30 to 40 feet of what looks like black water feeder pipe to get rid of as well as the metal tunnel rods

  • I'm sure you could find a good home for the water piping! Whereabouts are you?
  • Hostafan1Hostafan1 Posts: 34,888

    stick it on freecycle Bulkerb

    Devon.
  • bulkerbbulkerb Posts: 258

    I will ask the owners although its technically rubbish I never take things unless I ask I live just outside Henley on thames

  • Depending on what it turns out to be exactly I might be interested in buying it or making a charity contribution- I live near Thame so not very far.
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