Being a mini greenhouse you will be able to move it to get the most sun no matter what season. Get a couple of bricks and place on the bottom shelf as the wind will knock it over.

Plant your seeds into egg cartons and then you can plant these straight into the ground. We grew alot from seedlings this year and had great crops. Cucumber & zucchini grew so much we were giving them away to stop them rotting. Beetroot did really well and we are still harvesting it. Great roasted or in stews.
Beans, strawberries & tomatoes are just about finished and the pumpkins will be picked soon.

It is to late for watermelon as it needs alot of sun to make them taste nice.

Herbs can be kept in the greenhouse over winter as can lettuce.