Season Extension: Variety Trials and Selection

Season Extension: Variety Trials and Selection

Season Extension: Variety Trials and Selection

High Tunnels and Other Season Extension Techniques

These resources can help you determine which crops will be best suited to your season extension goals and growing conditions.

Kansas State High Tunnel Video Series


This video series was developed by Kansas State Research and Extension, and includes segments on the following topics related to commercial high tunnel or hoop house production:

Overview | Design | What to Plant | Basic Management Considerations | Intensive Management | Resources

Late-Season Strawberry Production Using Day-Neutral Cultivars in High-Elevation High Tunnels


This journal article discusses research trials involving day-neutral cultivars, high tunnels (hoop houses), low tunnels and targeted heating in North Logan, Utah, to extend the seasonal availability of local strawberries.

Moving Nursery Producers Toward Sustainable Practices Fact Sheets


These fact sheets discuss alternative containers, marketing and crop selection, alternatives to synthetic herbicides and integrated pest management in commercial nursery plant production.

Organic Heirloom Tomato Production in High Tunnel and Open Field Systems


A replicated, systems-level comparison study was carried out to evaluate the production of the popular heirloom tomato, Cherokee Purple, under organically managed high tunnel and open field systems.

Download File (873.37 kB)

Organic Production of Blackberries in High Tunnels in West Virginia


The objective of this season extension project was to evaluate the feasibility of growing blackberries organically within a commercial high tunnel or hoop house in central West Virginia, including pest management, cultivar and management considerations.

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Organic Winter Production Scheduling in Unheated High Tunnels in Colorado


Colorado State University researchers and five farmers explored winter production scheduling for optimal yields of hardy organic vegetable crops in unheated high tunnels.

Download File (1.02 MB)

Season-Long Strawberry Production with Everbearers for Northeastern Producers


This 70-page guide outlines profitable production techniques and research on everbearing strawberry varieties, including information on both field production and the use of high tunnels for season extension.

Download File (1.63 MB)

Specialty Crop Production in High Tunnels


This Utah State University fact sheet series on high tunnel season extension includes production information on raspberries, lettuce, summer squash, tomatoes and strawberries.

Using Low Tunnels to Extend the Growing Season for Organic Strawberries in Alabama


This project was designed to determine if the strawberry harvest season could be extended, potentially allowing farmers to get their strawberries to the market early for premium prices.

Download File (922.48 kB)

Winter and Summer Hoophouse Production for Small-Scale Growers


Brad Jaeckel tested high tunnel or hoop house production of a diversity of winter and summer vegetables. A handful of Moscow, Idaho, area growers have used hoop houses for season extension, but not yet for winter crops.

Additional Resources

The following resources, which were not funded or produced by SARE, contain valuable information.

Center for Plasticulture at Penn State University (a website with information on crop production, including cucumber, garlic, lettuce and tomato)

Fall Spinach - Harvest Date and Yield in High Tunnels and Spinach Cultivar Trial in a 3-Season Haygrove High Tunnel (Kansas State University fact sheets)

High Tunnel Melon and Watermelon Production (a University of Missouri fact sheet)

Organic Greenhouse Tomato Production (this fact sheet is available through ATTRA)

Organic Greenhouse Tomato Production (an ATTRA fact sheet)

Watering and Fertilizing Tomatoes in a High Tunnel (a University of Missouri fact sheet)

How to order

Availability varies by resource (many are accessible for free online). See individual resources for more information.

High Tunnels: What to Plant


Cary Rivard, Kansas State Research and Extension fruit and vegetable specialist, discusses important considerations including crop and variety selection, rotations and planting density. Watch more installments in the Kansas high tunnel video series.