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Greenhouse Grow How - Brigitte Zettl
- 1. Greenhouse Grow How Created by: Brigitte Zettl
- 2. Introductions • Why are you here? • What are you growing? • When are you growing it?
- 3. Why Start Plants in a Greenhouse? • An earlier season • Efficient use of time • More control
- 4. Let’s Start With Basics… How Do We Enhance This Effect? • Choice of flooring • Choice of covering • Positioning of the structure
- 5. Light
- 6. What Kind of Structure is Right for You? www.hobby-greenhouse.com
- 7. Something a Bit Larger Perhaps?
- 8. Our Gutter-Connected Raised Quonsets
- 9. State of the Art Greenhouse Technology
- 11. Light Intensity • Different plants require various intensities • Too much light causes sunscald • Too little light will stunt growth and prevent blooming • Light levels are expressed in footcandles (fc) >5000 = Very high 4000 – 5000 = Full Sun 1800 – 4000 = Dappled Sunlight 1000 – 1800 = Shade <1000 = Deep Shade
- 12. Photoperiodism Some species are very affected by day length • Long Day - 14-18 hours (lettuce, beets) • Short Day – 12 hours or > (cucumbers, some tomatoes) • Day Neutral – any hours (kale, cabbage)
- 13. Airflow Natural Ventilation Forced Air Ventilation
- 14. Ventilation Positives Negatives • Releases moisture in the air • Increases pest exposure • Replenishes CO2 • Increases time/money spent • Reduces disease • Can expose plants to cold temperatures by accident
- 15. Temperature Goals • 55-80 degrees F. during the growing season • Coldest temperature during the couple hours around sunrise • In winter 38 F. is enough for cool season crops and perennials
- 16. Temperature Cooling • Ventilation • Fogging • Shade or Shade Cloth
- 17. Temperature Heating • Insulation • Heat Sinks • Decomposing Materials • Radiant Heat • Natural Gas
- 19. What You’re Growing In… Soiless Mix Containers Considerations: • Right Size Right Plant! • Aggregate Size • Reuse = Sterilize! • Microbial Content • Nutrient Content • pH Appropriate • Proper Mixing Procedure – Vinegar – 10% Bleach – Hydrogen Peroxide – Ethanol
- 20. Plant Nutrition Macro Nutrients Recommended Fertilizers: • Nitrogen Garden Tone / Plant Tone • Phosphorus Fish Fertilizer • Potassium Seaweed/Kelp • Calcium Worm Castings • Magnesium • Sulfur
- 21. Irrigation • Automated • Hand Watering • Watch the edges! • Seeds need special attention!
- 22. Propagation
- 23. Keeping Records
- 24. Sexual Propagation Choosing your seed… What Your Seed Likes… • Heirloom vs. Hybrid (F1) • Cool, dry conditions when the embryo is sleeping • Organic vs. Conventional • Moist, warm, humid conditions once the embryo has been awakened DO NOT LET YOUR SEED DRY OUT EVER ONCE YOU HAVE GOTTEN IT WET!!!
- 26. Asexual Propagation Types Tool’s You May Need • Budding • Sterilizing Solution • Cutting • A Very Sharp Knife • Division • Rooting Solution • Grafting • Layering • Tissue Culture
- 27. Taking Cuttings Woody Plants Herbaceous Plants • Softwood (Spring) • Whole leaf (succulents) • Semi-Ripe (Summer & Fall) • Part Leaf (begonia) • Hardwood (Winter) • Leaf-Bud • Root/Tuber
- 28. Benches
- 29. Integrated Pest Management • Set Thresholds • Monitor & Identify Pests • Prevention • Control • Evaluation - Assess • Implementation – be Proactive!
- 31. Monitoring for Greenhouse Pests Tools You Will Need: • Lighted Magnifier • Sticky Traps • A Good ID Book • A Notebook & Pen • The Internet • Your Local Extension Agents Phone Number
- 36. Common Offenders Root/Crown Rot Phytopthora Bacterial Leaf Spot (Septoria)
- 37. Recommended Reading I.P.M. • What’s Wrong With My Plant? (And How Do I Fix It?); D. Deardorff & Kathryn Wadsworth • Integrated Pest Management for Floriculture and Nurseries; UC Davis Publication 3402 Propagation • The American Horticultural Society, Plant Propagation; A. Toogood (Editor) • Seed to Seed; Suzanne Ashworth