greenhouse temprature

whats the best temprature for greenhouse growing

 

really depends what you want to grow!
I have had an unheated greenhouse for a few years now and has served me well for starting off seedlings and growing cucmbers but I wouldn't trust it for anything more tropical!

 

As Axie says, it depends more on what you want to grow.

 

I have two cold greenhouses protected by fan heaters with the thermostats set to Frost free.

 

In an ideal world Wurzel 15 to 18 degrees would be perfect for most things but most things will do well outside that range. And it really all depends what you want to grow.

 

My greenhouse is over 80 deg. F in this hot weather during the day with the door open and it goes down to about 40 deg. F at night with the oilstove on and I have all maner of flowers and veg on the go and everything is fine.It's only when things get frosted there is a real problem.

 

Hi Roders
I think you may have inadvertantly mixed and matched fahrenheit and celcius. Its seriously cold in Suffolk at night -15C (5F) :wink:

 

Sorry guys I have corrected it.

 

Wurzel - I think for most normal things you wan't to create the conditions of a warm summers day inside your greenhouse. This is when plants are growing at their best. If it gets too hot some plants start to suffer, and if it gets colder they will grow more slowly.

 

i planted some tomato seeds 8 days ago and no sign of germination,yet sunflower seeds planted at the same time poked through within three days

 

I planted some tomatoe seeds in propogators, and left them in the greenhouse, they came good after about 2 weeks, but I scrapped them and started with new ones which I raised in a propogator indoors, as to keep the temperature alright, as I was raising peppers, chillies and cucumbers at the same time. If you've got a Wilkinsons nearby, go and get a couple of these: http://www.wilkinsonplus.com/Seed-Trays+Propagators/Propagator-Budget/invt/6313240

Well worth the investment if you ask me

 

Wurzel

I don't grow any veg - so can't comment on tomato seeds. However seeds in general take widely differing periods of time to germinate. Extra heat is often a way to speed them up a bit. I had a lot of seeds (mostly annuals) germinate in 4 or 5 days, then a lot more took 2 to 3 weeks.

This was the longest this year

Isoplexis sceptrum (above) took 71 days.

 

still no sign of tomatoe seeds germinating,after two weeks,had the same problem last year with this,yet tried some seeds that were three years out of date and fine so what is going on

 

I would say that mine started after about 2 weeks, just on the window sill which is above a radiator so they were reasonably warmer. They are about 1.5 inches tall now.

If the temperature has been cool or its not very bright then they'll take longer.

This year's crop has been very good and I have plenty of spare ones. Thank goodness the kids eat Muller rice yoghurts and we save the pots!

 

Peter that is so beautiful