Teaching Organic Farming and Gardening

Propagation/Greenhouse Management

2 | Unit 1.3

Demonstration 6: Seedling Development and

the “Hardening Off” Process 31

Instructor’s Demonstration Outline 31

Assessment Questions and Key 33

Resources 37

Glossary 39

Appendices

1. Seed Viability Chart 41


2. Soil Temperature Conditions for
   Vegetable Seed Germination 42


3. Examples of Propagation Containers 43


4. Days Required for Seedling Emergence
   at Various Soil Temperatures 44


5. Approximate Monthly Temperatures for
   Best Growth and Quality of Vegetable Crops 45


6. Propagation Media—
   Ingredients and Properties Imparted 46


7. Sample Soil Mix Recipes 47


8. “Pricking Out” Technique, Depth of Planting 48


9. Flat-Grown and Cell-Grown Seedlings 49


10. Propagation and Crop Performance Records Sheet 50


11. Greenhouse Records Sheet 51