any good commercial formulated potting mix, well drained home mix
Temperature
grows best in the cool season, hardy to about 28 degrees F (Pan America Seed)
Flowers
lavender pink, coral, etc. depending on specific cultivar
Dimensions
10-12 inches tall with equal or greater spread, mounding growth form
Maintenance
dead heading, cut back hard after flowering
Propagation
seeds, terminal cuttings, node cuttings
Misc Facts
The common name "Twinspur" comes from the two spurs or pouches found on the flower. Diascia from Greek: di meaning two, anthos meaning sac.
Notes & Reference
#51-Armitage's Manual of Annuals, Biennials, and Half-Hardy Perennials (Alan Arimitage), #109-Annuals and Tender Perennials for North American Gardens (Wayne Winterroud), Pan America Seed Company fact sheet