Planning Tools &
Seed Quantity Calculator
This tool helps you predetermine the number of seeds or plants you will need for a given amount of space.
Stationary Traditional High Tunnel Worksheet
This spreadsheet will help you determine costs to build a stationary traditional high tunnel at a given desired length using materials suggested by Johnny's.
Stationary Caterpillar High Tunnel Worksheet
This spreadsheet will help you determine costs to build a stationary caterpillar high tunnel at a given desired length using materials suggested by Johnny's.
Moveable Caterpillar High Tunnel Worksheet
This spreadsheet will help you determine costs to build a moveable caterpillar high tunnel at a given desired length using materials suggested by Johnny's.
Moveable Modular Cathedral High Tunnel Worksheet
This spreadsheet will help you determine costs to build a modular moveable cathedral high tunnel using materials suggested by Johnny's.
Seed-Starting Date Calculator
This tool figures the dates when it's safe to plant particular early crops outside, based on the frost-free date that you specify.
Succession Planting Calculator
This spreadsheet calculator allows you to input the date of your first planting of each crop, then it calculates the dates for later plantings. It also allows you to input your first frost date, counting back the appropriate number of days to determine the last date to plant and still get a crop before frost.
Target Harvest Date Calculator
Use this tool to coordinate production of one of more crops for harvest by a user-defined target date or otherwise important event. Determine seeding date relative to a specific harvest date.
Fall-Harvest Planting Calculator
This spreadsheet calculator works backward from your first frost date to determine the date to start seeds for crops that will mature as it gets cold.
Johnny's Grower's Library provides an extensive selection of helpful product information files, manuals, charts, planting and growing guides, technical articles, instructional videos, and more. Browse information specific to each of our seed and plant product lines: vegetables, flowers, herbs, and farm seed, as well as tools, supplies, methods, organic certifications, labels, and material safety data sheets.
Flower Growing Guide
This chart is designed to help you select the best flowers for your situation. Chart includes application, germination time, transplant information, days to harvest, and helpful growing information.
Herb Growing Guide
This chart will help you plan your herb growing strategy. The chart includes germination time, transplant information, and days to harvest.
New & Recently Revised
Cover Crop Decision-Making5 Steps for Deciding What to Plant When & Where
Guide to Winter GrowingWinter High Tunnel Scheduling Guidelines
- Winter-Harvest Crops Planting Chart CHART
- Winter Production in the High Tunnel
Overwintering Scheduling Guidelines
- Overwintering Crops Planting Chart CHART
- Protection Methods for Overwintering in Low Tunnels
- Managing QuickHoops Low Tunnels Excerpted from Eliot Coleman's Winter Harvest Handbook
- Focus on Crops & Varieties for Winter Growing
- Overwintering Onions from Seed Results & Recommendations from Our Trials
Beat the HeatPart 1: Cultural Practices to Offset the Heat Article
- Part 2: Getting Your Cool-Loving Crops Through the Summer Heat Article
- Chilling & Storing Your Summer-Harvested Vegetables CHART
Succession PlantingSunflower Succession-Planting Programs CHARTS
- Succession Planting Basics Interval & Timing Charts Vegetables, Herbs & Flowers
- Johnny's Planting & Harvesting Programs CHARTS
- About Our Seed
- FAQs About Organic Growing & Certification