Species Dahlias and cultivars growing to the south of the front range, T borders:
- Dahlia coccinea a Gardner and Knees collection from Mexico in 1993. Bright orange flowers held on a strong purple stem growing to 2 metres +. This is one of the parents of many hybrids and cultivars
- Dahlia merckii also from Mexico, purple petals with yellow anthers, held above light green foliage
- If you are looking for mass colour then Dhalia ‘Bishop of Llandaff’ is in full bloom. As with all Dahlias, the key to prolonged flowering is dead-heading.