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GH hazzards and pests...advise needed....

• Message 1. 

  Posted by zoomer44 (U14019069) on Sunday, 2nd May 2010

  Was given a GH which will be going up next weekend and planning to grow chillies, peppers and tomartoes in there this year which are currently in the house at night and plastic GH during day. Also thought I'd use the GH for germinating seeds and potting up for come again stuff and flowers ready to go out into garden.
  
  I'm going to invest in an auto roof vent and auto louvre opening for side of GH for ventilation thinking this keeps down humidity. Inside there'll be a bed and under the potting bench gravel.
  
  This is were my knowledge and experience stops and the grand plan looks alittle wobberly
  
  Was thinking of growing the toms in the bed and peppers/chillies in growbags
  
  Will I need to open the door every day and do you keep it open at night. It will get very hot in there during the summer, plastic GH already gets steamed up.
  
  In the area of pest control I have marigolds to plant with the toms and yellow plastic strips to catch flies
  
  The top of the GH will get direct sun all day from sun rise to sun set. On one side there is a 5ft fence and at the back a 4ft high fence. Here again the grand design is wobberley but sometimes you have to dip your toe in the water.

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• Message 2

  , in reply to message 1.

  Posted by poshHebeJeebie (U9319867) on Sunday, 2nd May 2010

  You seem to have most bases covered, especially with regard to ventilation. If we get a real summer this year, then opening the door does help to get a through-draught. But it is rarely necessary at night, and shutting the door then keeps the temperature warm, reducing the thermal night/day differences.
  
  If it is very hot, damping down the floor of the GH can help to keep it cool in the middle of the day.
  
  I also use shading to prevent over-heating/scorching. You can get a white spray (I think it's called Coolglass) that diffuses the light and can be a help. Or you can buy a plastic netting that goes on the outside, and performs the same function. The spray is cheaper - but has to be brushed off in the autumn. The netting can be used each year.
  
  I grow my tomatoes in a bed along one side, and chillies and aubergines in large pots on the bench, and it works well for me.
  
  Hope this helps.
  
  PHJ

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• Message 3

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  Posted by zoomer44 (U14019069) on Monday, 3rd May 2010

  Yes it does help, reasuring to know my bases are covered.
  
  After reading the thread about snails and slugs, I might get some copper piping hammer it flat and put at the door to stop them coming in.
  
  

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• Message 4

  , in reply to message 3.

  Posted by Lokelani (U8896212) on Tuesday, 4th May 2010

  My lovely husband has made me a small lean to, glass greenhouse. It is in a sheltered almost courtyard area, so even though south facing only gets sun in afternoon & evening.
  
  I only had a plastic one before so this is also my first year for growing stuff in it.
  
  I'm soon going to turf out the courgettes & cucumbers when the nights are warmer, then will grow on the tomatoes, chillis & peppers in it. The flowers will hopefully be out of it in a month too.
  
  So I will be learning along with you this first year no doubt!
  
  We bought an auto vent for the top & made the split doors like stable ones, so I'm hoping I can have the tops open if necessary without too many slugs/snails walking in during the day!
  

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• Message 5

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  Posted by 4smilingcat6 (U14338727) on Tuesday, 4th May 2010

  and yellow plastic strips to catch flies
  
  Can I ask you to think about not using them?-yes they trap white flies but also valuable flying insects such as bees and hover flies. Even blue bottles play a part in pollination

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• Message 6

  , in reply to message 5.

  Posted by zoomer44 (U14019069) on Tuesday, 4th May 2010

  Lokelani. Your lean to sounds ideal. The plastic GH are so handy. I started off with one last year and don't know what I'd have done without it this year. Gonna be a learninbg curve for us both.
  
  4smilingcat6. The yellow strips were an early warning system. I was going to plant flowers in troughs along with veg around the GH. I have dwarf asters, petunia, nasturtium along with marigolds which have grown from seed. No grand plan here they just came free with magazines and have grown when sown. If they atract pests I'm happy to lose them.
  
  Do greenfly and blackfly migrate into the GH because I've had problems with these in the garden.

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• Message 7

  , in reply to message 6.

  Posted by poshHebeJeebie (U9319867) on Tuesday, 4th May 2010

  Glad you feel that you are well on track Zoomer!
  
  Aaaaagh! Greenfly! They can appear from nowhere, and suddenly you can be inundatedI have found certain aubergines particularly susceptible. Vigilance is the watchword and squash at the first sign! Or spray if you feel it appropriate. But the warmth of the GH seems to suit them, so treating the problem sooner rather than later is a good idea.
  
  Never had a problem with blackfly, funnily enough.
  
  PHJ

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• Message 8

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  Posted by richardbees (U3432591) on Tuesday, 4th May 2010

  zoomer - congratulations on your v. thorough planning!
  
  If it's a glass GH I suggest you use shading paint e.g. coolglass on the sunny side.

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