Black Eyed Susan (Rudbeckia hirta var. hirta) in the Black Eyed Susans Database

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Full Sun to Partial Shade
Minimum cold hardiness: Zone 3 -40 °C (-40 °F) to -37.2 °C (-35)
Maximum recommended zone: Zone 10b
Plant Height: to 3 feet
Plant Spread: to 2 feet
Leaves: Evergreen
Other: depending on the zone it's growing in
Fruit: Edible to birds
Flowers: Showy
Flower Color: Orange
Bloom Size: 1"-2"
Flower Time: Late spring or early summer
Late summer or early fall
Other: bloom season depends on zone
Suitable Locations: Xeriscapic
Uses: Groundcover
Cut Flower
Will Naturalize
Wildlife Attractant: Bees
Propagation: Seeds: Provide light
Sow in situ
Other info: Press seeds into the soil surface, do not bury them
Propagation: Other methods: Division
Containers: Suitable in 3 gallon or larger
Needs excellent drainage in pots


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Posted by flaflwrgrl (North Fl. - Zone 8b) on Jun 7, 2012 7:16 PM

Black eyed Susans are native to most of North America. They are only absent in the southwest. They are quite drought tolerant. You can find them growing in open woods, along roadsides, dry fields, & in disturbed areas. They will freely reseed. They are members of the aster family. Black eyed Susans are biennial or short lived perennials but some of the cultivars are longer lived perennials which are best divided in the fall by separating the root ball. Dead head spent flowers to encourage bloom. A host plant for the caterpillar of the Silvery Checkerspot.
these flowers are best known for being the ones to answer the age old lover's question of "She loves me, she loves me not".

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Discussion Threads about this plant
Thread Title Last Reply Replies
Wild, Wonderful, West Virginia Wildflowers by mellielong Aug 11, 2016 8:04 AM 38
Perennial? by crittergarden Sep 28, 2014 7:38 AM 9

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