Winter Growing & Season Extension

Learn 10 different ways to extend your season using protected cultivation, with quick tips and recommendations from Johnny's Selected Seeds.

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.

An introduction to controlled environment agriculture (CEA), with an overview of greenhouse design and environmental control, growing systems, irrigation and mineral nutrition, hydroponics, biological controls, and considerations regarding location, marketing, suitable crops and varieties, workshops and continuing education opportunities, by Dr. Merle Jensen, Professor Emeritus and Founder, University of Arizona Controlled Environment Agriculture Center (UA-CEAC).

Here are Lisa Ziegler's 5 recommended "Cool Flowers" — cold-tolerant hardy annuals for overwintering and shoulder-season growing for the earliest possible blooms in spring.

Learn how a farming family in New York grows perennial herbs in an unheated hoophouse under row cover to offer fresh-cut herbs from April through December.

A review of basic high and low tunnel components, the rudiments for season extension and protected culture growing, with Lynn Byczinski and Johnny's Selected Seeds.

Learn about the roles day length and temperature play as critical environmental factors affecting plant growth, particularly the length of dark periods.

Using unheated hoophouses, Quick Hoops, and row cover with storage, cold-tolerant, and cold-hardy crops can help you be first and last to market from Johnny's Selected Seeds.

Read more about what is takes to plan for opening day at the market or wholesale accounts, using Johnny's Target Harvest Date calculator to determine when to plant.

An illustrated set of step-by-step instructions from Eliot Coleman on how to set up and manage your Quick Hoops low tunnels from Johnny's Selected Seeds.

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.