I don't stick strictly to the moon calendar for planting, but try to use it when I can; I've seen the difference it can make in crops such as the dwarf beans and corn crops I experimented with. The main principal in the moon calendar planting plan is that as the moon is waxing (getting bigger) is the best time for planting crops that grow mostly above ground, due to the "drawing up" effect of the moon on plant sap. I've also noticed the tendency of the weather to be more unsettled during this period - today it's turned cloudy and rainy, which is also great for planting as the seedlings get a bit of time to settle in before they are exposed to hotter days. The weather is also often likely to be more unsettled as we approach the autumn equinox on March 22nd - it's not usually as profoundly so as during the spring equinox, but still, good to get these plants in now.
2x Broccoli - Marathon
2x Purple sprouting Broccoli
4x Cauliflower - mini white
2x Red Cabbage
2x Cabbage - Derby Day (green)
4x Russian Red kale
2x purple Kohl Rabi
2x green Kohl Rabi
6x Mizuna down one side of the bed
6x Rocket down the other side of the bed
In the open space along the middle of the bed I've sown some seeds of Rat-tailed Radish in the middle, and Detroit Dark Red beetroot (2-3 to a hole). These should grow quickly and be harvested before the brassicas get very big - the raddishes will be grown for their seed pods, though by then I'd need the nets off so the flowers are pollinated (which just occurred to me as I am typing, so we'll see about that).