Semi-ornamental edibles...

Don't go buying toms Marmande and Black Cherry, or coriander seed! I'll send you some

 

No probs That's quite a smallholding you're going to have next year! x

 

Do you have wall space for an old-fashioned small yellow tomato? Happy to send you some yellow pear tomato seeds. I zigzag the plants against fencing wire as a trellis on a warm wall. This is because the cordon wants to grow about 10 foot tall! Small, sweet and well- flavoured toms from July until late November normally....

 

Another type of Kale that I found good to grow and looks interesting enough to work as an ornamental is "Red Russian".

I also think red currants and blue berry shrubs can look nice.

 

Umm in my opinion 16 out of the 27 need help to start and continue them growing...

I'm answering like this as it does not fit in with your greenhouse plan.

Steve...

 

Carrots and Beetroot are the only ones I would sow outdoors, and for the last two seasons I have module started and raised beetroot, leaving only Carrot to sow outdoors.

Melons, and peppers including chillis will need to be grown undercover, either greenhouse or largish cold frame. Possibly toms and cucs too, again dependant on your weather. I would start everything except carrots indoors. Pushed for time now, will respond better later if I can unless someone beats me to it.

Steve...

 

I’ve successfully sown chilli (and sweet pepper) seeds indoors, raising the young plants, again indoors, until the nights are warm enough for some of them to go outside against warm walls. Warmth is more important for the seeds, and plants, than sunlight.
I can’t remember who on this forum gave me the date, but it works. I sow somewhere around the 14th February. This gives me plants with enough growth time to crop well (I average around 30-50 chillies per plant depending on variety), whilst not overcrowding me too much. If I had access to an un-heated greenhouse, I would probably stick to the same regime, but Would hope to get better crops (potting them on sooner). I would hope to do better than the meagre 2 sweet peppers per plant I get outdoors, by growing them in the greenhouse!

With tomatoes - just checked my records - I tend to sow early April. Again, as I’ve no greenhouse, I have to balance between establishing plants, to avoiding leggy light-starved plants. With access to a greenhouse, I might aim for mid-March?

Courgettes I sow mid-April. As these are hungry monsters, I would be looking to plant in open ground, so you are limited by last frost date. If they get leggy, they never truly recover, so I don’t see any advantage sowing earlier.

I don’t have much experience/success with the other plants, so will not offer any advice!

 

Looks like you have your hands full already but Dolichos Lab Lab - strong annual climber producing edible purple pods. You can eat fresh or freeze them. Pretty flowers too.