Frosts in Sydney are infrequent and light, like the one that left its touches on my heaped lawn clippings this morning. Our humidity is often too low for frost to form in winter, or it's cloudy, which keeps the temperature too high, or else it's windy. I'd be surprised to see more than half-a-dozen frosts a year, and the ground never freezes.
The results are in from my Great Pea Experiment. Not a single pea came up and there was no sign of any peas in the ground. Perhaps a bird is eating them?
So I did what any gardener would do. I took a deep breath and... sowed another batch.