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Growing all Seasons: High Tunnels


Across the U.S., farmers are discovering the benefits of high tunnels. NRCS can help producers integrate high tunnels into their operations and provide financial assistance through the Environmental Quality Incentives Program (EQIP).

High Tunnel imageWhile they may look like greenhouses, high tunnels are actually quite different. Greenhouses are usually constructed of glass and metal, with plants grown in pots above the ground. High tunnels are polyethylene, plastic or fabric covered hoop structures that can be assembled for a fraction of the cost, with plants grown in raised beds or grown directly in the ground.

“We have really cold, wet springs with a lot of rain. High tunnels allow people to get into the ground and start producing crops earlier. They can also help people extend the growing season later as we go into the rains in the fall.” 

Certified Organic Farmer
Full Plate Farm, WA

Because the growing conditions are controlled, plant health is optimized. High tunnels protect plants from severe weather and allow farmers to extend their growing seasons – growing earlier into the spring, later into the fall, and sometimes, year-round. And because high tunnels prevent direct rainfall from reaching plants, farmers can use precise tools like drip irrigation to efficiently deliver water and nutrients to plants. High tunnels also offer farmers a greater ability to control pests and can even protect plants from pollen and pesticide drift.

Season Extension image


Urban Farmer
Side Yard Farm and Kitchen
Ridgefield, WA

A number of soil health practices can be used in high tunnels, including cover crops and crop rotations, which also prevent erosion, suppress weeds, increase soil water content, and break pest cycles.


Cover crop image











High Tunnell image with man and little girl


Perhaps the best thing about high tunnels is that they help farmers provide their communities with healthy local food for much of the year – food that requires less energy and transportation inputs and provides communities with greater food security.

Benefits of High Tunnels

  • Extend growing season
  • Improve plant and soil quality
  • Reduce nutrient use and pollen and pesticide drift
  • Reduce energy use and improve air quality by providing consumers with a local produce


Supporting Practices

  • Mulching
  • Cover Crops
  • Critical Area Planting
  • Diversion
  • Grassed Waterway
  • Irrigation Reservoir
  • Irrigation System, Microirrigation
  • Surface Drainage, Field Ditch
  • Underground Outlet
  • Read the High Tunnel Success Stories

Image of a high tunnelView the new Conservation at Work high tunnel video.



microirrigation imageSome people use micro-irrigation in high tunnels. Watch a short video about micro-irrigation.