Black-Eyed Susan
Rudbeckia hirta
The state flower of Maryland and a keystone native plant — supports 17+ species of specialist bees and is the host plant for several butterfly larvae.
How to care for black-eyed susan
Deadhead spent blooms through August to extend flowering, then leave late blooms to self-sow. Provide good air circulation — crowded plants develop powdery mildew on lower leaves.
Garden uses & design ideas
Best garden use
Place it in repeatable drifts through borders so the color and texture carry the eye instead of appearing as a one-off plant.
Pair it with
Echinacea, Russian sage, Sedum make easy companion choices because they share similar light, water, or visual texture needs.
Layout tip
Match it with full sun exposure, group it with other low-water plants so one irrigation zone can stay lean, and check USDA zones 3-9 before planting. Use the garden planner to test spacing around its mature size: 1-3 ft tall, 1-2 ft wide.
Gardener note — Double-check local invasive, edible, and toxicity guidance with your county extension office before planting around pets, children, or natural areas.
Companion plants
Black-Eyed Susan grows well alongside these — similar light, water, and texture needs.
Common pests & problems
Where it grows best
Native to Eastern and central North America; thrives in USDA hardiness zones 3-9.
Frequently asked about black-eyed susan
What USDA zones does Black-Eyed Susan grow in?+
Black-Eyed Susan is hardy in USDA zones 3-9. Outside these zones, it can usually be grown indoors or as a seasonal annual.
How much sun does Black-Eyed Susan need?+
Black-Eyed Susan prefers full sun. Place it where it gets that light most of the day for best growth and flowering.
How often should I water Black-Eyed Susan?+
Black-Eyed Susan has low water needs. Allow the soil to dry between waterings. Deadhead spent blooms through August to extend flowering, then leave late blooms to self-sow. Provide good air circulation — crowded plants develop powdery mildew on lower leaves.
How big does Black-Eyed Susan get?+
Black-Eyed Susan reaches a mature size of 1-3 ft tall, 1-2 ft wide. Growth rate is fast, so plan spacing accordingly when planting.
What plants grow well with Black-Eyed Susan?+
Black-Eyed Susan pairs well with Echinacea, Russian sage, Sedum, Salvia, Ornamental grasses. These companions share similar care requirements and don't compete aggressively for resources.
What pests affect Black-Eyed Susan?+
Common Black-Eyed Susan problems include aphids; powdery mildew; leaf spot. Catching early signs in routine inspection prevents most damage.
When does Black-Eyed Susan bloom?+
Black-Eyed Susan blooms in summer to fall in yellow with dark center. Deadheading spent flowers (where applicable) often encourages a longer bloom window.
Design a garden with black-eyed susan in minutes
Drag plants into a 3D space, walk through it, or upload a photo and let AI redesign it. Test spacing around its mature size before you plant.
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