Because of space constraints my tomatoes are about 12" apart. as are the peppers which are in the front row ahead of the tomatoes, also the basils in that row.The onions are interspersed between the other plants, and I will have two hills of potatoes, one at each end of the tomato row. That’s probably not ideal, but they seem to flourish and bear well.
That’s not a garden you’ve got DM, . . it’s a vegetable stall. 
. . . good luck this year with them all. 
Thanks, Nero! They usually do quite well, only problem is the *%!^! squirrels stealing the results of my labors, as I’ve complained about often and loudly!
The wife’s car passed it’s MOT today so that cheered her up, 
. . . I also got a vine, . . that cheered me up, . . bedded 12 toms, 3 courgettes, and 2 peppers today, . . just looked at the temp and it’s +6, . . the forecast said we might have a frost in some glens tonight :shock: . . . I also got a Stephanotis climbing plant, I had one of these many years ago and the heavy scent off them is divine.
http://www.houseofplants.co.uk/Stephanotis_floribunda.htm
They smell very like Gardenias and will scent the whole greenhouse, . . I was gonna plant a melon or two but you can’t if you grow cucumbers in the same place because of cross pollination, . . so they say.
Sweet or hot peppers, Nero? Good about OH’s MOT . I’ve heard that Stephanotis is beautifully fragrant, never actually seen or smelled one. I love gardenias, don’t do well for me, sadly …
Stephanotis smells wonderful DM, it’s an indoor plant and can scent a whole room, . . I’ve started training it along the back wall of the greenhouse and it’ll mask the pungent smell of the toms, which can be a bit strong.
The peppers are sweet ones but I also have hotties, . . . they make your eyes water.
There is one more climber I must get, . . it’s this one, the flowers are enormous.
http://www.houseofplants.co.uk/Gloriosa_superba_Rothschildiana.htm
I had one of these too many years ago and they’re stunning, . . this will look very nice with the other climber I think.
Got it, . . . just placed an order for a 3 tuber pack with a garden centre.
I have grown that, Nero, and it is stunning indeed. I grew mine outdoors.This isn’t a real good pic, it was about 5 years ago.
http://i34.photobucket.com/albums/d117/dandysmom/Non%20Cat/DSCN1351.jpg
I wish you could grow them outside, I’m useless with houseplants but I love the scent.
. I was gonna plant a melon or two but you can’t if you grow cucumbers in the same place because of cross pollination, . . so they say.
It`s never stopped me-melons are not the easiest crop to grow but it can be done
The cucumber seeds I planted 2 weeks ago aint appeared yet, . . thanks for the info OG, I’ll have a go at the melons, . . if I had the choice of eating a cucumber or a melon I’d choose the latter.
The temp dropped to +4 during the night so I got a paraffin heater this morning, . . Steph aint looking too pleased but she’ll get over it, . . as long as temps fluctuate gradually and not suddenly like in a cold draft plants do recover.
The heater will burn for a week during night time on one gallon of paraffin so that’s not bad, . . the electric ones are very expensive to keep going, although they are thermostatically controlled, . . the temp at this moment is +12 which is borderline for tropicals. 
The sun’s just popped out, . . . it’s been freezing all day, never been above +8 externally, . . I felt like a lighthouse keeper earlier, . . trimming the wicks etc, 
The paraffin heater gives out .7KW so that’ll be enough for now but if I get more tropicals I shall have to look at running two pipes from the CH boiler to the hothouse, . . these will have to be underground, the distance is 20 foot and I’ll have to get completely watertight insulated pipes 'else I’ll loose all the heat from the flow pipe, . . this is the best option I think, cost wise, . . a radiator in there will only be set to a low setting even during winter, . . . anyone know of the insulation type pipes I’m looking for ?
I could use a 30mm plastic drain pipe filled with insulating material with the copper heat supply and return pipes running down the middle of it, . . this could be sealed either end before being put underground, . . the pipe would run from the basement of the house and come up under the hothouse floor via a 90 degree elbow, . . . any ideas on this my friends ?
Nero, do you have an electrical outlet in the greenhouse? I was thinking of one of those portable plug-in radiators. We had one in the doctors examining room for Winter as it was always chilly there.
Yes, there’s power in the house DM, . . from the garage, however, the cost of running an electric heater is prohibitive, . . the diameter of that plastic pipe I mentioned would be 4 inches rather than 30mm, this would make it easy to fill with styrene granules and run the copper pipes through, . . the extra heat needed from the CH boiler would be negligible.
Would not use copper but plastic 15mm heating pipework, less heatloss and no joints under ground
What type of compression joints are available for plastic heating pipes galty ? . . . I was gonna use 8mm copper pipes encased in a 4.5 inch plastic rain pipe, the joints on these are rubber therefore they’re watertight, . . this could easily be filled with insulating granules with the flow and return pipes routed inside it.
All the joints in the CH are brass compression types and it would be easy to fit 2 “T” pieces into the circuit, the distance to the hothouse is 8 metres from the circuit, about the same as the furthest rad in the bedroom.
If your heating is micro bore(8mm pipe work) then you would have to tee in at the manifold.
The fittings for 15mm plastic(push fit) can be used on copper pipe.
If using push fit on copper do not cut pipe work with a hacksaw use a pipe cutter as ends must not be burred.
Thanks for that galty :-), there’s no manifold downstairs below the floors, it’s a 15mm circuit, . . upstairs there is a manifold and it’s an 8mm circuit, I have a cutter BTW.
Browsing in Homebase yesterday I came across a gardenia, . . . what a fantastic scent they have 
. . . I brought her home 
. . . gardenias aint the easiest to cultivate but if you see one give it a go, they need shaded light and moisture but you’ll never need an air freshener in the house when they’re in flower, this one has a few unopened buds on it, the leaves on them are sooo glossy. 
http://i188.photobucket.com/albums/z48/den234/misc/gardenia01.jpg
I love gardenias, good luck with it Nero … and as you say, they have a wonderful scent…