Polytunnel’s should be cleaned at least once a year, maybe more if your Polytunnel is nearer trees as it will probably have algae forming on the outside and debris from the trees falling onto it. There are different ways in which to clean your tunnel. Here are a few helpful tips :-
If you get a bucket of warm water and add a small drop of washing up liquid, you will then be able to use a soft brush to clean the tunnel, for the bits you cannot reach get an old bed sheet and with a person each side of the tunnel gently go along the tunnel. Be careful not to do anything that will scratch the cover as this will reduce the light transparency.
If you have plants inside your Polytunnel or Glasshouse in the winter months there are accessories available to help keep the cold at bay and protect from frost damage. The crop protection fleece will work as a duvet for plants and we have a range of thermostatically controlled heaters that can be used. The heaters will have the advantage of making snow melt before it can build up, helping to protect your Greenhouse or Polytunnel against structural damage.
On milder days it would do no harm to open the doors for a few hours to ventilate your Polytunnel . Frost occurs when air stands still. In Q gardens last year the plants inside unheated Polytunnels with open doors were affected less by frost than in the unheated Polytunnels with closed doors.
Weather conditions over the winter period can vary from mild to extremely cold. If we are fortunate enough we may get a White Christmas it would be very wise to clear the snow from your Polytunnel or Glasshouse. Snow is very heavy and can cause structural damage if it builds up. You can remove it using a soft brush, a bed sheet or a rope (but if using a rope on a Polytunnel do be careful not to scratch your polythene as this reduces light transmission).
Many of our competitors Polytunnels were damaged by snow last year, luckily very few of our customers had any issues. Crop support bars are particularly helpful in Polytunnels to strengthen and protect against snow damage. A frost protection heater (which we supply a range of) can have the advantage of making snow melt before it can build up, helping to protect your Polydome Greenhouse or Polytunnel against structural damage.