What are these plants...

 ...that tower over us at 10 to 12 feet tall, and fill up half of a 20 foot bed?  They are Jerusalem artichokes ( Helianthus tuberosus),  commonly known as sunchokes.  I am growing them at the request of family members who fell in love with the delicate flavor of this root vegetable when traveling in California.  It's a species of sunflower native to the eastern part of our country.  The tuber should be ready to harvest next summer and, in the meantime, I shall have to content myself to wait for the blooms that should appear before the frost!

...that tower over us at 10 to 12 feet tall, and fill up half of a 20 foot bed?  They are Jerusalem artichokes (Helianthus tuberosus), commonly known as sunchokes.  I am growing them at the request of family members who fell in love with the delicate flavor of this root vegetable when traveling in California.  It's a species of sunflower native to the eastern part of our country.  The tuber should be ready to harvest next summer and, in the meantime, I shall have to content myself to wait for the blooms that should appear before the frost!