Mammoth Grey Stripe sunflowers: how to grow the giants that stop traffic on the farm road
There is something about a ten-foot sunflower that makes people slow down. One summer we planted nearly 1,800 Mammoth Grey Stripe sunflowers in a small patch in our meadow so that customers could see the blooms as they drove down the farm lane. By August we had a wall of gold that stopped cars in both directions. Here is everything I know about growing the big ones.