What,(if any), veg could i grow in an unheated greenhouse during the winter ?

Winter variety of lettuce such as Kwiek or Winter Density. It's a little late for sowing carrots but you may get a way with it if you sow a short-rooted variety such as Early Nantes 2 or Amsterdam Forcing. You could sow potatoes ready for New Year's Day. Spring Cabbage is planted in the Autumn for spring greens in the spring - Durham Early or Pixie are good examples. You could also grow Spring Onions, Swiss Chard, and American Land Cress.

Thompson & Morgan do an Oriental Salad Leaves mix seed which can be grown all year round in the greenhouse.

If your winters are very cold there likely isn't anything you can grow in an unheated greenhouse. Even the cool weather plants that can withstand a frost or two will succumb to constant freezing temperatures.

the place do you reside? Is the eco-friendly domicile heated? i could think of beginning root vegetables could be a stable decision. they might improve interior the fall, and while wintry climate comes they hpwould only keep the flexibility interior the inspiration or tuber. If there are any perenials you prefer to start from seeds or roots you need to furnish them a head start up. i could recommend carrots, collards, parsley, spinach, mustard, onion, radish, turnip, Asparagus, Rhubarb, and Endive. you are able to probable get a superb crop of mint and basil to your man or woman use. you additionally can start up some vegetables so as that they would be larger and closer to waiting once you transplant them exterior for the wintry climate. do no longer anticipate to get lots interior the way of fruit.

Kale, collards, Mesclun type leaf lettuces, Broccoli, Beets, Cauliflower, Garlic, Swiss Chard and more.

See link.

http://www.burpee.com/vegetables/second-season-veg...

Carrots, Cabbage anything low growing. You could put the compost in a deep bucket and grow spuds.

UK

Plant now for spring harvest:

cabbage

chives

onions

radishes

broccoli

leaf lettuce

spinach

beets

carrots

herbs