Gloriosa daisy, Rudbeckia hirta, is a perennial daisy often used in borders, containers, and for naturalizing. You can grow gloriosa daisies easily by utilizing these helpful facts, information, and tips.
Gloriosa daisies will self-seed in the garden so this is a real plus for the gardener, especially if you are wanting to naturalize your daisies. Rudbeckia hirta varieties prefer full sun and grow in Zones 4-9. They will reach heights of 12”-36” h x 18”w. This daisy is a short-lived perennial that is commonly grown as an annual.
The flowers of this Gloriosa is bright yellow with a mahogany disk around the center of the flower. The flowers will appear from summer to early autumn. These beautiful flowers attract butterflies and are excellent as cut flowers.
The flowers perform well in wildflower gardens, borders and are widely used in container plantings. Good companion plants for gloriosa daisies include ’Snowbank’ white boltonia, tall cosmos, and ‘Rotfuchs’ spike speedwell.
Caring for Gloriosa Daisies
Plant 18” apart in late spring. Water the plants deeply when the soil is dry. If the soil is too rich or if excessive nitrogen is applied, or if there is too little sun, the foliage may appear floppy. Apply 3” of vegetative mulch in the summer. Deadhead spent blooms to encourage re-blooming. Remove plants just before the first frost or right afterward.
Propagation is done by sprinkling seeds over the growing medium and cover or leave them uncovered. Thoroughly moisten and keep moist, not soggy, until the seeds germinate. Germination occurs in 5-10 days at 70 degrees. Transplant 20-28 days after sowing, after transplanting, reduce temperature to 50 degrees F.
Pests and Diseases: Slugs, powdery mildew, and rust are occasional problems.
- The cultivar ‘Bambi’ reaches 12” high and bears multicolored flowers of yellow, brown, and bronze.
- ‘Goldilocks’ reaches 24” high and have brownish yellow and bicolored flowers.
- ‘Rustic Dwarfs’ reach 24” high and have brownish, yellow and bicolored flowers.
- ’Superba’ has yellow and maroon flowers.