Dahlia 'Hartenaas'

How to grow Dahlia 'Hartenaas' in NZ

Dahlia 'Hartenaas' grows best in full sun with fertile, well drained soil enriched with organic matter. Plant tubers in spring once the risk of frost has passed. Water regularly while plants are actively growing and feed with a quality flowering fertiliser throughout the season. Taller stems may need staking to support the flowers. Remove spent blooms frequently to encourage continuous flowering from summer through autumn.

Dahlia 'Hartenaas' care tips

Dahlia 'Hartenaas' is easy to care for with regular watering and feeding during active growth. Keep the soil evenly moist but avoid waterlogged conditions. Apply mulch to retain moisture and suppress weeds. Deadhead faded flowers to promote fresh blooms and keep the plant looking tidy. In colder parts of New Zealand, lift and store the tubers after the foliage dies back for planting again in spring.

Dahlia 'Hartenaas' size, spacing, and growth rate

Dahlia 'Hartenaas' typically grows to around 80 to 120 cm tall and 50 to 70 cm wide. Space plants approximately 50 to 60 cm apart to provide good airflow and room for healthy development. Growth is rapid once warm weather arrives, producing sturdy stems and an abundance of flowers that continue until the first frosts with regular care.

Landscaping uses for Dahlia 'Hartenaas'

Dahlia 'Hartenaas' is ideal for mixed borders, cottage gardens, and dedicated cutting gardens where it delivers months of colourful interest. It also performs beautifully in large pots and containers on patios, decks, and entranceways. The flowers are excellent for fresh floral arrangements, and regular harvesting encourages even more blooms. This variety also attracts pollinating insects, adding life and movement to the garden.

Why buy Dahlia 'Hartenaas' from The Plant Company?

The Plant Company is NZ’s most trusted plant nursery, supplying premium quality dahlias that are carefully grown for outstanding garden performance. Every Dahlia 'Hartenaas' is selected for healthy roots, vigorous growth, and dependable flowering. We provide expert advice, careful packaging, and fast nationwide delivery so your plants arrive in excellent condition and establish quickly for years of colourful enjoyment.