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Greenhouse management

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  • Transcript

    • 1. Greenhouse Management
    • 2. Build the Greenhouse to fit your crop!!!
      • Consider:
      • Crop Needs (light, temp, etc.)
      • Size Needs
      • Rafter Strength & Height (baskets)
    • 3. Things to Consider Before Locating a Greenhouse
      • Availability and initial cost of land
      • Availability and cost of water
      • Land characteristics, topography and elevation
      • Availability of labor
      • Proximity to market
      • Check with authorities to determine utilities and zoning regulation
      • Temperature (min/max), wind pattern, slope and exposure
    • 4. Site Your Greenhouse
      • Free of shading from overhangs (i.e. trees)
      • Level Site
        • Slight slope is OK, in order to drain H2O
      • Well Drained Soil
        • Avoid Low Areas w/ Poor Drainage
        • Low areas can form “cold pockets”, increasing heating bills
      • GH should be accessible to vehicles, utilities, and storage areas.
      • Position GH according to crops light needs (see next slide)
    • 5. Position According to Sun
      • Position long side of house facing SW to SE for greatest light exposure to plants
      • For lower light plants, house can face NE to SE or NW to SW
    • 6. How Much Space Do You Need In Your Greenhouse and What Types of Houses Will You Need?
    • 7. Multiple Greenhouses for Staging Plants
      • Warm House
      • Cool House
      • Cold Frame
      • Cloches
      • Shade House
      • Protected & Unprotected Field Area
    • 8. Greenhouse Styles
      • Quonset
      • A-Frame
      • Gothic Arch
      • Gable Roof
      • Dome
      • Slant Side
      Here’s a thinker: Which of these aren’t commercially viable and why?
    • 9. Gutter Connected Houses
    • 10. Foundation
      • Permanent vs. Temporary
    • 11. Framing Materials
      • What are the Pros and Cons?
      • Wood (Cedar and Painted Wood)
      • Aluminum or Galvanized Framing
      • Schedule 80 PVC
    • 12. Choose a Greenhouse Cover
      • Key issues: Cost, Life, and Light
      • Glass
      • Polyethylene Film (UV Resistant)
      • Polycarbonate
        • Single-Layer Structured Panels
        • Double-Layer Structured Panels
        • Triple-Layer Structured Panels
    • 13. Heat Loss Factor for a Small Greenhouse *Heat loss in BTU/hour/square feet/degree F. 1.0 0.8 Double-layer plastic 1.8 1.5 Glass 1.4 1.2* Polyethylene or fiberglass Heat loss (windy area) Heat loss (calm area) Greenhouse covering Table 1. Heat Loss Factor for a Small Hobby Greenhouse
    • 14. Heating the Greenhouse
      • What type of heating system
        • Ambient, overhead infrared, overhead forced air, bottom radiating (“star-fin”)
      • What type of fuel
        • Oil, Natural Gas, Electric, Coal
      • Orientation and location of heaters
        • Root zone heating
        • Overhead foliage heating
      • How is the heat transferred?
      • Is it efficient?
    • 15. Ventilation
      • Forced Air Ventilation System
        • Louvers and fans
        • Degrees of complexity (multipoint, multi-fan systems)
      • Passive air flow through roof vents
      • HAF (Horizontal Airflow Fans)
        • Circulates air around the greenhouse
        • Prevents stagnant air
      Insect Screening to keep bugs out of greenhouse
    • 16. Do You Need To Cool Your GH?
      • Fan/Pad Systems
      • Fog System (Mist)
      • Ventilation
        • Retractable Roof
        • Roll up walls
        • Shading
        • Vents
    • 17. Shade Covers
      • Shade Paint
        • Only works on glass
        • Cheap
        • Not long lasting
        • Difficult to remove
      • Shade Cloth
        • 40%-80%, flexible shading
        • Removable
      • Black out cloth for photoperiodic crops
    • 18. Floors
      • Crushed Rock
        • 5/8 minus
        • Pea gravel
      • Concrete
      • Asphalt
      • Ground Cloth
      • Dirt
      • Combinations
    • 19. Pick a Bench, Any Bench! 
      • Materials:
      • Wood Lattice (Redwood or Spruce)
      • Expanded Metal
      • Other
      • Size:
      • Bench size should fit crop
      • Height. Is it comfortable?
      • Types:
      • Static vs. Rolling Benches
    • 20. Bench Orientation
      • Will the house be open to the public
        • Yes? You better have wide aisles.
        • No? Consider rolling benches to maximize space efficiency
      • Bench Space vs. “Field Area” ratio
      • Do you even need benches?
    • 21. Work and Storage Areas
      • Head house
        • Located on north wall
        • Used for potting, quarantine, storage, tools, packing, shipping/receiving, boiler room.
    • 22. Irrigation
      • How will you keep
      • Your plants watered?
      • Boom Systems
      • Drip
      • Rainbird
      • Flooding Tables
      • Capillary Mats
      • Manual Hoses
      • Buckets
    • 23. Fertilizer Injectors
      • Automatic dosing of concentrate fertilizer
      • Fertilizer Injectors
        • i.e. Dosatron
        • Larger growers
      • Hose-end feeders
        • Smaller growers
    • 24. Propagation Area
      • Will you be propagating plants or just growing them on?
      • What kind of propagation will you do?
      • How much room do you need?
    • 25. Modern GH Innovations
      • Retractable Roof Greenhouses
      • Root-zone Heating
      • Seed Machines
      • Pot/Flat Filling Machines
      • CO2 Generators
      • Sulfur Generators
    • 26. Greenhouse Management
      • Facilities Maintenance & Repair
      • Crop Timing
      • IPM
      • Accounting
      • Accounts Payable
      • Sales
      • Shipping