What Do Sunflower Heads Look Like When Ready To Harvest?
Sunflower heads are ready to harvest when the back of the flower head turns yellow and brown and the petals have wilted and fallen off. The center of the sunflower head will also become black and the seeds will appear plump and fully formed. The head will droop forward and the seeds can easily be removed by rubbing or brushing them off the face of the sunflower head.