Carnations vs. Dianthus: Understanding Hardiness and Fragrance

A gardener asked whether carnations come as both annuals and perennials and how to tell them apart when buying. The answer lies in hardiness and growth habit.

Florist Carnations (Tender Perennials)

The long-stemmed carnations sold by florists are Dianthus caryophyllus—tender perennials that survive year-round only in frost-free zones (USDA 8+). In colder areas, they're grown as annuals or in greenhouses. Refrigeration during shipping destroys their intense clove fragrance.

Hardy Dianthus (Perennial Pinks)

Shorter, cushion-forming dianthus (often called "pinks") are hardy perennials (USDA 3–9). They reach 6–12 inches tall, bloom prolifically in spring, and retain their strong spicy scent. These are the ones that return reliably in northern gardens.

Shopping Tips

• Tall, large-flowered types = tender, usually grown as annuals or for cutting.
• Short, mounding types with smaller flowers = hardy perennials.
• Check the label for hardiness zone and species name.

Both are easy from seed and can be grown under lights. For fragrance and longevity, hardy dianthus are the better garden choice in most regions.