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Low, Quick, and Caterpillar Tunnels: An Overview of Season Extension Techniques

Robert Hadad, Extension Vegetable Specialist
Cornell Vegetable Program

Last Modified: January 24, 2013

Low, Quick, and Caterpillar Tunnels: An Overview of Season Extension Techniques
Season extension offers growers expanded times for growing produce. Getting an early jump or holding crops later into the sales season can really increase profits when the techniques are used and costs taken into account.

There are many styles and types of construction available on the internet. The ones mentioned in this presentation cover what is commonly available. Many suppliers carry hoop materials, row covers, and greenhouse film. Ingenuity and imagination creates more effective ways of set up and operation.

The caterpillar example in this presentation is based on low-cost materials. The tunnel is not recommended for handling snow loads. One problem found with it is that rain water can pool pockets of the greenhouse film between the cord/rope. This would require daily observations to push the water out so as not to cause bending of the hoops. Use of the tunnel should be for the extension of the season or getting an earlier start of the season making it easier to work inside. In order for the tunnel to stand up to the winter, daily maintenance is required.

A heavy duty version of the caterpillar tunnel is shown in another presentation listed on this website. It uses chain link fence poles and offers year-round operation with the stronger construction.

Additional resources that may be helpful to you:
Resources and Supplies for Tunnel Construction (PDF; 196KB)

Diggin' Tunnels: Low, Quick, and Caterpillar Tunnels for Season Extension (pdf; 2108KB)

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Eggplant

Ethnic Vegetables

Ethnic Vegetables

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Horseradish

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Lettuce / Leafy Greens

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Peas

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Pumpkins / Gourds

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Rhubarb

Rhubarb

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Rutabaga

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Snap Beans

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Squash - Summer

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Sweet Corn

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Upcoming Events

2025 Muck Onion Growers Twilight Meeting in Oswego

Event Offers DEC Credits

June 26, 2025
Oswego, NY

Open to all Onion Enthusiasts, the Muck Onion Growers Twilight Meeting will include new fungicide recommendations for Botrytis leaf blight and Stemphylium leaf blight, onion maggot seed treatment update, herbicide demonstration tour, and more. This educational event is immediately followed by a catered dinner; both are FREE thanks to generous sponsors!

2.0 DEC recertification credits available in categories 1a, 10 and 23. 

View 2025 Muck Onion Growers Twilight Meeting in Oswego Details

Ontario Produce Auction Growers Meeting

July 15, 2025
Stanley, NY

This evening meeting will demonstrate pest management in fresh market vegetables in both field and greenhouse (high tunnel) vegetables, primarily for those growing for wholesale auction. A hands-on demonstration of weed, insect and disease identification in vegetables including management options. Details on each topic will focus on field observations at the farm.

View Ontario Produce Auction Growers Meeting Details

Orleans Summer Vegetable Meeting, 2025

Event Offers DEC Credits

July 16, 2025
Waterport, NY

Meeting themes are pest management in a wide array of produce and best practices for pesticide use. Professor Brian Nault will cover allium leaf miner and thrips in onions, garlic, and leeks, and discuss insect challenges in other crops. Bring your questions! We'll also have a field walk that includes high tunnel tomato and cucumber. 

DEC credits available: 0.5 in CORE plus either 1.25 in 1a and 23, or 0.75 in 24.

View Orleans Summer Vegetable Meeting, 2025 Details

Announcements

Community Gardens Soil Testing Program

Soil testing supports the growth and expansion of community gardens by protecting the health and safety of the food produced in these gardens. CCE Harvest NY, in partnership with the NYS Department of Agriculture & Markets (AGM) and the Cornell Soil Health Lab, is offering eligible, food-producing gardens in New York State the opportunity to send soil samples for testing without charge.

The soil test will analyze samples for heavy metals and nutrient levels. Test results help gardeners make appropriate plans to produce high quality fruits, vegetables, and flowers. Technical support and education for participating growers will be provided by the CCE Harvest New York team. Learn more about the 2025 Community Gardens Soil Testing Program.

NY Urban Farms Pest Management Fact Sheet Series

Cornell Cooperative Extension has partnered with dozens of urban farms across New York State to demonstrate and evaluate sustainable pest management strategies. Together with farmers, we found success using control methods that prevent or reduce crop losses through exclusion strategies, crop timing, host resistance, the introduction of beneficial organisms, and more. Regardless of management strategy used, common requirements for success include a knowledge of the pest and disease complex, preventative deployment and commitment to the process. The New York Urban Farms Sustainable Pest Management Fact Sheet Series includes case studies highlighting pest management techniques that New York urban farms have found valuable.

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