A number of species and cultivars are suitable for garden culture. They produce spikes of tubular flowers in a variety of bright colors. The plant grows in any fertile, well-drained soil, but dislikes clay. Flowering is best in cool weather.
Propagation is by seed or cuttings.
Take softwood cuttings from non-flowering side shoots. The seed germinates in two to three weeks at temperatures between 65 and 75 degrees. Seedling growth will be slow and uneven. This information is for educational purposes only. References to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned.