Rudbeckia (Black-Eyed Susan)
Native and very easy to naturalize. All have yellow daisy-like flowers with dark cone-shaped centers. Excellent for mass color display in the sunny border.
| Growing Temperature: | 65-70° F days
60-65° F nights |
|---|---|
| Soil pH: | 5.8-6.5 |
| Fertility: | Feed with a constant liquid fertilization program with every irrigation. |
| Pests and Diseases: | Aphids, sawflies, whiteflies (greenhouse), thrips, beetles, plant bugs, stalk borers, aster leafhopper.
Rot (Sclerotium), leaf spots, bacterial blight (Pseudomonas, Xanthomonas), Botrytis blight, aster yellows, downy mildew |
| Potting and Timing: | Rudbeckia can be planted any time throughout the growing season. |
| Moisture: | For potting soil use professional planting media.
Requires average to moderate moisture. Water as needed when the plants are young and becoming established. Once they are large, they will require more frequent irrigations, as they will dry out rather quickly.
When irrigation is needed, water them thoroughly, ensuring the entire growing medium is wet or nearly saturated. It is best to allow growing medium to dry out slightly between irrigations |
| Planting Level: | Place crown just below soil surface, plugs even with soil surface. |
| PGRs/Pinching: | PGRs may be used if desired. |
| Lighting: | Requires long days to flower. Grow under high light levels for best results. |
