Thanks for the slit-and-stake idea!
I've been saving 2-liter clear plastic bottles and expecting them to blow over unless I drape a floating row cover over everything, and weight it down.
I was hoping that, in cloudy rainy coastal WA, I could just unscrew the tops from the bottles to let out enough hot air to keep them from cooking in the daytime.
And I expect slugs to burrow up from soil, inside the bottles, to eat seedlings. So I was going to put a small pinch of iron phosphate bait under each bottle, and trust the bottles to keep the bait dry.
