At the moment, we have five tomato plants and five cucumber plants in big pots on the floor, two courgette plants in a growbag, and we also have a shelving unit, which is in the center, against the back wall (i.e. opposite the door). It has to go in the center, because it's too tall to go against the side wall (because of the slope of the roof).
Is it a solid floor? I grow in the greenhouse border and replace the soil each Winter (well "soil" is actually a mix of my home made compost and manure, its fairly rough when it goes into the greenhouse, but lovely when it comes out the following year and goes onto the beds
I used to grow in pots but got fed up with having to water so often, also my beds are "lowered" so provide more soil-to-ceiling height than the tops of pots did, so I can get an extra truss or two on my Tomato plants
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Next year, I'm hoping to grow lots more stuff other than tomatoes and cucumbers, so I'm looking for some pointers on making the best use of the space. I wonder how other people organise their greenhouses."
On one side I grow Tomatoes (a row along the central path), then a "middle" row of Aubergines & Sweet peppers, and then Melons (against the glass).
Cucumbers at the far end (where you have your staging) so they have a slightly different climate, and less draughts from the open door
On the other side I grow early crops of Sweetcorn (harvested the first ones a week or two back), Dwarf French Beans (as they are self pollinating), Chillies and more Melons and Aubergines.
I have a vine planted outside at the North end which goes in through a pane that I have replaced with a piece of plywood with a hole in it
and trained inside the roof
After Summer crops I grow some Chinese cabbage and some more dwarf French beans for late crops and over winter crops of Winter Little Gem lettuce, Chard and Kohl rabi.
(I have a second greenhouse that I have staging in and use that for raising plants etc.)
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Also, should we be opening any windows for ventilation even on relatively cold days, or is it OK to leave all the windows closed when it's not very warm outside?"
This time of the year the temperature is not often falling below 15C and I leave half the windows on one side open at the first-notch all night. (I don't open the other side in order not to encourage a through-draught).
During the day, unless the weather is very overcast, the windows are open full, and the door is open a bit (full on very hot days). I am trying to encourage convection cooling rather than the roaring-gale method! The smaller the greenhouse the more roaring-gale is the only method available, and I think that stresses the plants; with a larger house convection is easier to achieve (particularly if you have louvre windows low down). My door is opposite end to the prevailing wind direction.
Need fresh air in the greenhouse, otherwise moulds will be encouraged, and as I'm not goring anything tropical I figure they will be happy with 15C minimum.
(In the spring when raising Tomatoes / Cucumbers / Melons I never let the temperature fall below 10C)