plant corn when oak leaves are as big as squirrels' ears
I brought home this stem of white oak leaves today to remind myself to plant my corn seeds soon. Its time ... "Plant corn when oak leaves are as big as squirrel's ears" is an old phenology truism. These oak leaves are almost as big as rabbit's ears now. I better get to it!
phenology: planting by natural cues
Popcorn (Zea mays averta)