Its just too damp in there

**Mato** · 09-05-2012, 04:03 AM

Is the growhouse ventilated at all? How close are your plants spaced? They may be too close together, creating extra humidity. Do you have any type of flooring that is able to drained?

**yekim_4321** · 09-05-2012, 05:29 AM

I think ventilation of some kind would help maybe leave the door open slightly while weather is not being nasty but i'm no expert sure someone will be along to offer sound advice

When i looked at the position of your growhouse and what its sitting on my very first thought was (and i do mean very first) ooooo 8 * 6 GH would go lovely there

**Two_Sheds** · 09-05-2012, 07:01 AM

You're watering too much, and you need to open those zips to let the condensation out

**donnakebab** · 09-05-2012, 07:09 AM

I have a smaller version than you. It just has 4 shelves in it and I leave the 'door' open during the day now as temperatures are getting higher. In fact I have left it open all night aswell, last night included, but I haven't got anything in there that requires more heat like peppers or tomatoes.

**redser** · 09-05-2012, 08:36 AM

Had one of those for the last two years and yes you need to open the zips for at least a while each day to let it dry out. Weather permitting of course! Try not to shake the water free, it will fall on the plants and can cause scorch when the sun comes out.
These can heat up very very fast in direct sunlight, so be aware of the forecast and open it up to let some ventilation in.

**Bigmallly** · 09-05-2012, 10:21 AM

As others have said, it's condensation Sarah due to overwatering. Nothing to do with the amount of rain you have had. Stick a thermometer inside & you will be surprised the amount of heat they can hold. As suggested, open the zip during the day.

**sarah_rance** · 10-05-2012, 04:19 PM

Great tips everyone - Thank you. I have started leaving the zips open (today and yesterday) and is drier in there already.

I bought a thermometer a couple of weeks ago and when it was really cold and wet last week it wasnt getting much above 11 or 12c in there even in the day. Today and yesterday, when I opened the zips it was about 16 or so first thing in the morning, so it definitely holds the heat well - so obviously thats why its condensation.

Having the zips open and the temp dropping to the outside temp wont be too damaging to my peppers and toms though will it ?

**rustylady** · 10-05-2012, 04:28 PM

Originally posted by sarah_rance View Post

Having the zips open and the temp dropping to the outside temp wont be too damaging to my peppers and toms though will it ?

I doubt very much whether the temperature will drop to the same level as outside, don't forget your plants in the greenhouse are protected from the wind which causes chilling. They will be much happier with better ventilation. Don't forget that heat rises, so if your toms and peppers are still small enough put them on a higher shelf.

**Potstubsdustbins** · 10-05-2012, 05:07 PM

You will do far more harm to your toms by not having enough ventilation it is one of the main causes of Botrytis.

Colin

**singleseeder** · 10-05-2012, 06:29 PM

I'm guessing that there is a greater ratio of damp compost/plants to air in a blowaway, compared to a stayput IYSWIM. A recipe for condensation.

**sarah_rance** · 11-05-2012, 07:49 AM

Thanks everyone - They look fine with the door being open. I'll be doing that from now on.

**Gazz666** · 17-05-2012, 07:39 PM

Hi Sarah, It appears your problems have been sorted but i'll add my 2 pence worth because i have exactly the same experience and set up as you.

I found that these types of GH's heat up very quickly and condensation can build within 5 mins during the day despite it not being overly hot but they can cool down just as quick, which is a pain on a bad day and u want to vent.

Through trial and error i found on a cool day say around 6-10c open just 1 zip 3/4 of the way up, just lvl with the top shelf. That will clear most of the condensation whilst retaining most of the heat. On a good day I open both zips completely and let the door flap or tie it up depending on the temp inside.

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