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Greenhouse Grow How

Greenhouse Grow How. Created by: Brigitte Zettl . Introductions. Why are you here? What are you growing? When are you growing it? . Why Start Plants in a Greenhouse?. An earlier season Efficient use of time More control. Let’s Start With Basics…. How Do We Enhance This Effect?

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Greenhouse Grow How

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  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

  10. Creating the Perfect Environment

  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 Forced Air Ventilation Natural Ventilation

  14. Ventilation Positives Negatives Increases pest exposure Increases time/money spent Can expose plants to cold temperatures by accident • Releases moisture in the air • Replenishes CO2 • Reduces disease

  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

  18. Giving Plants What They Need

  19. What You’re Growing In… Soiless Mix Containers Right Size Right Plant! Reuse = Sterilize! Vinegar 10% Bleach Hydrogen Peroxide Ethanol Considerations: • Aggregate Size • Microbial Content • Nutrient Content • pH Appropriate • Proper Mixing Procedure

  20. Plant Nutrition Macro Nutrients • Nitrogen • Phosphorus • Potassium • Calcium • Magnesium • Sulfur Recommended Fertilizers: Garden Tone / Plant Tone Fish Fertilizer Seaweed/Kelp Worm Castings

  21. Irrigation • Automated • Hand Watering • Watch the edges! • Seeds need special attention!

  22. Propagation

  23. Keeping Records

  24. Sexual Propagation Choosing your seed… • Heirloom vs. Hybrid (F1) • Organic vs. Conventional What Your Seed Likes… • Cool, dry conditions when the embryo is sleeping • Moist, warm, humid conditions once the embryo has been awakened DO NOT LET YOUR SEED DRY OUT EVER ONCE YOU HAVE GOTTEN IT WET!!!

  25. Our Germination Chamber

  26. Asexual Propagation Types Tool’s You May Need Sterilizing Solution A Very Sharp Knife Rooting Solution • Budding • Cutting • Division • Grafting • Layering • Tissue Culture

  27. Taking Cuttings Woody Plants Herbaceous Plants Whole leaf (succulents) Part Leaf (begonia) Leaf-Bud Root/Tuber • Softwood (Spring) • Semi-Ripe (Summer & Fall) • Hardwood (Winter)

  28. Benches

  29. Integrated Pest Management • Set Thresholds • Monitor & Identify Pests • Prevention • Control • Evaluation - Assess • Implementation – be Proactive!

  30. Integrated Pest Management

  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

  32. Common Offenders Aphids Cabbage Loopers

  33. Common Offenders Fungus Gnats Crickets

  34. Common Offenders Whiteflies Thrips

  35. Common Offenders Rhizoctinia Downy Mildew

  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

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