With minimum effort I have continued to grow vegges through one of our colder winters. The frames for greenhouse covers for my extra large gardens cost $150 and the film cut to size with my remarkable clips another $190. You could use my heavy duty frost cover instead of the film which sells for $45 (2 x 18.2 metres). I will even throw in the clips for free! Either way you can get a head start this spring.
This is what the finished greenhouse looks like
Nice and warm inside
Garlic loves the cold
Beetroot and spring onions
Broccoli and cabbage with bird net to keep out the cabbage moth
Eggplant in another of my greenhouse gardens