In one of my raised beds a stray runner bean plant has emerged and started climbing up the pea sticks. It is a white flowering type growing nowhere near where I planted the beans last year. Do you suppose it could have overwintered itself, or was it a stray bean that got mixed in with the french bean packet that I sowed. I have given it a cane to grow up and it looks really stupid, one plant on one cane in the middle of a bed. But hey, you've got to admire its spirit.