Larkspur

(Consolida spp.)

Introduction

The cut flower varieties of Larkspurs are natives of southern Europe. They used to be classified under the Delphinium genus but they are now known as Consolida. The flowers are produced on feathery spikes and come in a range of colours.

Larkspurs are usaully grown from seed and many hybrids are available. Protection from wind, heavy rainfall, frost and hail is essential for successful cut flower production. Most northern growers use raised beds for production as the plants are susceptible to a range of root and crown diseases. Check your soil type before deciding if this is required on your site. Drip-tapes is the recommended method for irrigation.

Growing Larkspur

Propagation:	Plants are grown from seed.
First harvest:	Varies. Cut when 25–30% of the flowers are open
Time of flowering:	Varies. Plants require a period of cool to initiate flowers. Flowering time is usually 4–6 months after sowing seeds.
Crop protection:	Two layers of florinet. More if the site is particularly windy.
Soil type:	Friable, free draining soil essential. Grow on raised beds if there is any chance of root or crown diseases developing. pH6–6.5
Fertilisers:	Larkspurs benefit from moderate inputs of both nitrogen and potassium. Take care, however, as excessive N can lead to poor stem quality.
Pest/Diseases:	Take care to avoid Sclerotinia and Botrytis in the crown and roots. Also watch for Powdery Mildew and Botrytis on the leaves.
Harvesting:	Harvesting during the cooler parts of the day is recommended. Stems are cut when 25–30% of the flowers open. Place immediately in water containing a post-harvest solution. Grades are based on length of stem and colour
Marketing:	There is an emerging export market for Larkspur. However, most are sold on the New Zealand domestic market.
Further Info:	Crops for Southland grew a commercial crop of Larkspur in the 2000-01 season. See the Commercial Returns page of this website for a comprehansive diary of events and gross margin for this crop.