Winter Growing & Season Extension

Use this comparison chart to see at a glance which Bobcat Tunnel Kits are compatible with various options for the end walls, roof, roll-up sides, and ventilation.

We've overwintered more than 25 cut-flower crops successfully in our multiyear, Zone 5a, unheated tunnel trials. Use this workbook to compare yield, rate of survival, and performance of specific varieties, mixes, and series. Set up as a spreadsheet for you to download, save to your system, sort and filter for your own planning and recordkeeping purposes.

Use this chart to schedule your planting dates of vegetable crops for overwintering. Chart depicts crops from 3 levels of reliability for success.

A full-color, downloadable and printable (PDF) comparison chart of row cover and insect netting options and uses.

Use our chart to schedule plantings of your winter-harvest crops, and enjoy a seamless harvest all winter long.

Use this comparison chart to assess different types of Tufflite IV Greenhouse Film applications, type of tunnel, dimensions, and part numbers, from the research and trialing team at Johnny's Selected Seeds.

Join former Trial Technician Steve Rodrigue in a review of a recent season extension trial, conducted here at Johnny's Research Farm in Central Maine. This review focuses on a number of chicory and spinach varieties available from Johnny's Selected Seeds.

Join Flower Trial Technician Joy Longfellow for a review of the irrigation set-up for Johnny's unheated overwinter flower trial tunnels.

Join our 4-season-grower friend to the North, Niki Jabbour, for some tips on planning and planting the fall vegetable garden.

Watch our video to learn how to extend the growing season for cold-hardy crops with a very late-season harvest, or overwinter them for earliest possible spring harvest. See how Quick Hoops benders can allow you to accomplish this by creating tunnel hoops out of galvanized electrical conduit.

Use these spun polypropylene covers to protect crops from cold and pests. Available in 6 thicknesses and dozens of sizes.

A hoophouse is a passive crop-protective structure that expands a grower's options considerably. Here are the basics, from Johnny's Selected Seeds.