Project Overview
Annual Reports
Commodities
- Vegetables: broccoli
Practices
- Crop Production: crop rotation
- Production Systems: general crop production
Proposal abstract:
Project objectives from proposal:
Winter sprouting broccoli, specifically referred to as either “purple-sprouting” and “white-sprouting”, are known in Europe but relatively unknown in the United States. This is reflected in their absence from most commercial seed catalogs, and the complete lack of peer-reviewed literature on development or production of this crop in the U.S.
Researchers at the Institute for Horticultural Research in Warwick, England developed modern varieties of sprouting broccoli suitable for commercial production, and then transferred these varieties to private companies for further development (Crisp and Gray, 1985 and Crisp, et. al., 1985). Gray (1989) describes purple-sprouting broccoli as an “unworked” crop compared to other broccolis and cauliflowers.
In 2006, the crop was first grown at UNH to determine if it would survive NH winters if protected in tunnels. Our preliminary results showed that all tested varieties of purple- and white-sprouting broccoli will grow successfully in unheated high tunnels and that the application of a poly-spun row cover increases yields. The use of black plastic bed mulch had no significant difference on yield. Studies in 2006 and 2007 were conducted using cultivars available from seed sources that primarily supply British growers (Elsoms, Bejo, Thompson & Morgan). We have been cooperating with U.S. seed suppliers (Johnny’s Selected Seeds, High Mowing Seeds) to ensure availability of seed for varieties that perform well in New England. As a result, High Mowing Seeds now offers one variety of winter sprouting broccoli. We will continue to work closely with seed suppliers and encourage them to offer seeds of the best adapted varieties for the region.
An expanded replicated trial was planted in fall 2008 at UNH using eleven cultivars. The objectives of the current study are to determine:
- Which varieties are best adapted to NH, with respect to total yields, maturity dates, disease resistance, and overall performance.
- The effects of using additional rowcover within a tunnel
- The effects of using three different planting dates (mid-Aug, early Sept, mid-Sept)
Seeds and transplants have been distributed to six growers (including some of our grower-cooperators) as a pilot test evaluation of successful growing practices. Growers will provide feedback after the current winter on cultural practices, questions, and economic profitability, and how to incorporate this crop into successful farming operations of varying sizes. Specifically, growers will help us identify additional factors that may limit adoption of this crop so we can cooperatively address these questions in next year’s on-farm and University trials.