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Greenhouse - too hot?

Hi All

Looking for some advice as a relatively new greenhouse owner.  The greenhouse is currently insulated and I have some seeds (hopefully!)germinating in a heated propagator and a heated mat.  The temperature is currently 33 degrees in there but currently nights are very cold.  I have heater which works on a timer in the night to keep the temperature about 5 degrees.  My questions are : should I turn the heated propagators off in the day as its so hot in there?  or should I remove some or all of the insulation to even things out a bit, keep the propagators on and the night heating?

Some advice appreciate

Thanks Cazza


  • wild edgeswild edges Posts: 10,171
    Do your propagators have thermostats? and are you opening doors and windows during the day to reduce the heat in there?
    Tradition is just peer pressure from dead people
  • Thanks for your quick reply.  The propagators don't have thermostats.  The roof vents open automatically but there is roof insulation underneath them and they only open a very little way.  Thats why I am thinking we should remove the insulation across the roof? I have opened the door a little, but have not opened the lower vents as again they are covered by insulation so opening them will have little effect.
  • wild edgeswild edges Posts: 10,171
    What are you using for insulation? It's recommended to ventilate a greenhouse on any sunny day just to help prevent fungal problems so definitely a good idea to get some air moving through if you can.
    Tradition is just peer pressure from dead people
  • Horticultural bubble wrap.  Is it time to take it all down now I wonder?
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