Root & tuber crops

The vegetable crops covered by this Crop Advisory Group are carrots, kumara, beetroot, parsnips, yams, and taro.

Fresh potatoes are represented by Potatoes New Zealand.

Over 20% of carrots produced are exported fresh, valued at $8 million in 2013. 

Kumara production is mainly concentrated in the alluvial plains of the Northern Wairoa River (Northland) where approximately 90% of product for the New Zealand fresh and processing industry is grown. Five major packhouses now wash and grade product to a uniform industry standard. Around 17,500 tonnes are produced, which is worth around $25 million on the domestic market.

The industry continues to seek access to varieties with higher yield, better quality and lower mutation rates. Kumara is harvested in February and stored, and the longer it is held, the sweeter it becomes. This vegetable is not related to the potato. 

Violet Root Rot

This project, funded by MAF Sustainable Farming Fund and Vegetables New Zealand, will improve knowledge and develop control measures for the disease causing fungus Violet Root Rot (VRR). Violet Root Rot is a major problem of the vegetable industry in the Ohakune district. Previous attempts to control VRR have been unsuccessful, and growers have no proven tools to combat the disease.

A series of field trials will be established in commercial crops to identify the most effective fumigants, application rates, frequency, and timing. Trial sites will also serve as demonstration blocks for district growers.

Grower's rotation practices (e.g. potatoes, pasture, or fallow) will be reviewed to see if there are any consistent patterns that could assist in developing an integrated disease management strategy. Click here to view the project summary document, or click here to download the final report.

Kumara SARP SFF 07 040 Final Report 2008

This report was funded by Vegetables New Zealand to investigate the pest problem, agrichemical usage and pest management alternatives for the kumara industry across New Zealand.  The information in this report will assist the kumara industry with its agrichemical selection and usage  into the future.  Go to Research Reports - Members to download the report.

Statistics (2013)

Roots & Tubers Overview




Number of Growers 40 45
Area planted 2,600 hectares 1,500 hectares
Production 78,000 tonnes 17,500 tonnes
Exports $7.5 million

Source: Statistics New Zealand

Andre de Bruin (Director / VNZI Board Chairman)
AJ & KL de Bruin
PO Box 148
Dargaville 0340
Phone: 09 439 6714
Fax: 09 439 4283
Mobile: 027 272 4239

Amrut Bhana
Hira Bhana & Co Ltd
71 Tuakau Road
Pukekohe 2120
Phone: 09 238 7242
Fax: 09 238 7248
Mobile: 0274 959 766

Sue Deadman
GM and SM Deadman
2391 State Highway 49 RD 1
Ohakune 4691
Phone: 06 385 8761
Mobile: 021 736 340

Doug Nilsson
Dunsmore Gardens
207 Baylys Coast Road RD 7
Dargaville 0377
Phone: 09 439 0185 (DDI)
Fax: 09 439 0185 (home)
Mobile: 025 532 017