You know, I'm just realizing that I wasn't taking climate change into consideration with the timing. You can plant them into mid-June with a typical Cascadian summer, I think. If it's a climate change hot summer, maybe not. Peas do cross-pollinate, but because they're self-pollinating you don't have to put much space in between them. 10-20 ft is the recommended difference. I think the photo up top is a standard garden pea. (It's the only one I didn't take myself...)