• Butterfly Blue Pincushion Flower
• Cabernett Dracaena Palm
• Caesar's Brother Siberian Iris
• Candy Stripe Creeping Phlox

• Cape Rush
• Caradonna Meadow Sage
• Carex buchananii
• Carex flagellifera 'Toffee Twist'

• Caroline Coral Bells
• Cascade Spice Japanese Iris
• Cassa Blue Flax Lily
• Catlin's Giant Carpet Bugle

• Ceratostigma plumbaginoides 'Leadwort'
• Chicago Apache Daylily
• Chilled Wine Siberian Iris
• Chocolate Chip Carpet Bugle

• Chrysocephalum 'Flambe Yellow'
• Cora Louise Itoh Peony
• Coreopsis 'Tequila Sunrise'
• Coreopsis grandiflora 'Early Sunrise'

• Cotton Tail Thrift
• Crater Lake Blue Speedwell
• Cream Delight New Zealand Flax
• Creme Brulee Tickseed