Planning Tools & Calculators
Use Johnny's interactive planning tools and calculators to help with planning and scheduling your growing season. From calculating how much seed you'll need and when to plant, replant, and harvest, to the resources you'll need to build your new high tunnel, our calculators can help you streamline your operation to become more productive, profitable, and enjoyable.
- Seed Quantity Calculator
This tool helps you predetermine the number of seeds or plants you will need for a given amount of space. - Stationary Caterpillar High Tunnel Worksheet XLS
This spreadsheet will help you determine costs to build a stationary, 12-foot-wide caterpillar high tunnel of a given desired length using materials suggested by Johnny's. - Stationary Traditional High Tunnel Worksheet XLS
This spreadsheet will help you determine costs to build a stationary, 12-foot-wide traditional high tunnel of a given desired length using materials suggested by Johnny's. - Moveable Caterpillar High Tunnel Worksheet XLS
This spreadsheet will help you determine costs to build a moveable, 12-foot-wide caterpillar high tunnel of a given desired length using materials suggested by Johnny's. - Stationary Traditional Gothic Cathedral High Tunnel Worksheet XLS
This spreadsheet will help you determine costs to build a stationary, 14-foot-wide cathedral high tunnel with traditional style coverings. - Moveable Modular Gothic Cathedral High Tunnel Worksheet XLS
This spreadsheet will help you determine costs to build a modular moveable, 14-foot-wide cathedral high tunnel using materials suggested by Johnny's. - Stationary Traditional Elliptical High Tunnel Worksheet XLS
This spreadsheet will help you determine costs to build a fixed, 24-foot-wide traditional elliptical high tunnel of a given desired length using materials suggested by Johnny's
Plant
- 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 XLS
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 XLS
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 XLS
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.
Grow
- Grower's Library
Johnny's Grower's Library contains an extensive selection of helpful product and methodological information, including 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 Culture Comparison Chart PDF
This chart can help you select the best flowers for your situation. Information includes application, germination time, transplant information, days to harvest, and growing tips. - Herb Culture Comparison Chart PDF
This chart will help you plan your herb growing strategy. Information includes germination time, transplant recommendations, and days to harvest. - Vegetable Crop Planting Programs
A series of Planting/Programs indicating which varieties of particular crops are best adapted for planting and harvesting in the different seasonal slots, pretrialed and selected by Johnny's Research Team. - Growing Ideas
Johnny's Blog
New & Recently Revised
- Cut-Flower Succession Planting • Your Seed Chronicles: Planning & Planting for an Abundant & Frequent Floral Harvest • by Debra Prinzing, Author & Founder of Slow Flowers
- Johnny's Hot Pepper Palooza • 10 Types of Chilis to Bring the Heat to Your Harvest • by Steve Bellavia, Johnny's Pepper Product Manager
- On Our "New for 2019" Open-Pollinated Tomato Revivals • Breathing New Life into Time-Worn Gifts from the Past • by Emily Rose Haga, Johnny's Plant Breeder
- Grower Profile: Javier Zamora • JSM Organics, Royal Oaks & Aromas, Monterey County, California
- Getting Started with Cut Flowers • Top 15 Tier-1 Cuts
- Cut-Flower Garden Planner • For Home Gardeners • Brochure (PDF)
- Sample Cut-Flower Garden Map • For Home Gardeners • (PDF)
- Dynamic Comparison Charts & Key Growing Information Pages Watch Our 1-Minute Tutorial Clips!