Have picked polk when was about ankle high and ate raw. Sure was good. Picked some bout knee high and ate raw. Always heard to never pick polk after it turns red. This knee high was almost there on stalk as far as turning red. what the hell. Got so sick I thought I was going to die, coming out both ends. Guess you got to cook it! So be carefull. Sure some of ya know this already. Have picked other greens and good. Wouldn't place that feelin on anybody. Feel better today late,and this was Thursday night. Trying to sweat out the poison outside. For all who need to know, BE CAREFUL!