| Description | Golden Glow Rudbeckia (Rudbeckia laciniata hortensia) is a tall native, heirloom Rudbeckia with double yellow flowers. |
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| Pronunciation | (rud-BEK-i-ah)(la-sin-ee-AH-ta)(hor-Ten-si-ah) |
| Plant Type | Perennials Hardy, Site author's observations |
| Hardiness Zone | 3-9 |
| Sunlight | full, mostly sunny, some shade |
| Moisture | average to moist |
| Soil & Site | average |
| Temperature | heat resistant |
| Flowers | a plethora of fully double, 3" diameter, drooping, yellow to golden yellow, end of July through August till early September in my garden |
| Fruit | achene (a dry fruit where the seed separates from the seed coat) |
| Leaves | lower 3-5 lobed, upper less lobed, green |
| Stems | stiff hairs, sand paper texture |
| Dimensions | up to +7 feet, spread to 3 feet, upright form, forms a basal clump of leaves |
| Maintenance | will reseed itself, can spread quickly from the base, it will more than likely need to be staked or supported by some structure, stems rather weak and can be broken by strong winds, height can be controlled by pinching |
| Propagation | easy by division in the spring, seeds |
| Misc Facts | "A serendipitous discovery in a group of seedlings in 1894. Said to be “the most popular hardy perennial introduced during the last 25 years,” April 1905, The Garden magazine. Recommended by Gertrude Jekyll in 1908." (#164) AKA: Cutleaf Coneflower, Double Black-Eyed Susan 'Hortensia', Outhouse Plant |
| Author's Notes | This a very tall plant and will need to be staked or supported. The ones I saw growing at Heritage Flower Farm in Mukwonago, Wisconsin, were at least 2 feet taller than me. Grew this plant in my garden starting in 2019 through 2020 (still growing). Reached 7-8 feet tall with a plethora of flowers |
| Notes & Reference | #100-Wildflowers of Wisconsin and the Upper Midwest (Merel Black and Emmet Judziewicz), #144-Missouri Botanical Gardens web site (www.missouribotanicalgarden.org), #164-Heritage Flower Farm (www.heritageflowerfarm.com) |
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