It’s hardy in Zones 6-9. Tall sunflower (H. giganteus ... from early summer when they start to shoot up all the way into winter as the birds bombard them, prying loose individual seeds.

As you move indoors for winter, some plants can come with you ... A disclaimer: Hybrid varieties (including some marigolds and sunflowers) won’t produce offspring identical to the parent.

Leaving some plants up, such as coneflowers, heliopsis (sunflowers), black-eyed Susan, and ornamental grasses provide food (seeds) and shelter for birds. Don’t cut back marginally hardy plants ...

The U.S. Department of Agriculture said in January that U.S. sunflower production in 2010 slipped from the previous year. - Winter storms on the East Coast increased demand for sunflowers to feed ...