(Rudbeckia hirta) Best known of all the prairie flowers and the easiest
to grow. A single plant can produce hundreds of
blooms over the summer and into the fall. Excellent
cut flower with 6-10 days of vase life. Plants grow
2-3'. Self-seeding biennial or hardy annual. Hardy
to zone 3.
6-8 weeks before planting out
Green Thumb Tip Sow seeds indoors just beneath surface of soil.
Transplant outdoors when the danger of frost has
passed. Likes poor soil lacking minerals, including
sand and gravel. Stems can become weak if planted
in good soil and may require staking.