Greenhouse Management
Build the Greenhouse to  fit your crop!!! <ul><li>Consider: </li></ul><ul><li>Crop Needs (light, temp, etc.) </li></ul><ul...
Things to Consider Before Locating a Greenhouse <ul><li>Availability and initial cost of land </li></ul><ul><li>Availabili...
Site Your Greenhouse <ul><li>Free of shading from overhangs (i.e. trees) </li></ul><ul><li>Level Site </li></ul><ul><ul><l...
Position According to Sun <ul><li>Position long side of house facing SW to SE for greatest light exposure to plants </li><...
How Much Space Do You Need In Your Greenhouse and What Types of Houses Will You Need?
Multiple Greenhouses for Staging Plants <ul><li>Warm House </li></ul><ul><li>Cool House </li></ul><ul><li>Cold Frame </li>...
Greenhouse Styles <ul><li>Quonset </li></ul><ul><li>A-Frame </li></ul><ul><li>Gothic Arch </li></ul><ul><li>Gable Roof </l...
Gutter Connected Houses
Foundation <ul><li>Permanent vs. Temporary </li></ul>
Framing Materials <ul><li>What are the Pros and Cons? </li></ul><ul><li>Wood (Cedar and Painted Wood) </li></ul><ul><li>Al...
Choose a Greenhouse Cover <ul><li>Key issues: Cost, Life, and Light </li></ul><ul><li>Glass </li></ul><ul><li>Polyethylene...
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...
Heating the Greenhouse <ul><li>What type of heating system </li></ul><ul><ul><li>Ambient, overhead infrared, overhead forc...
Ventilation <ul><li>Forced Air Ventilation System </li></ul><ul><ul><li>Louvers and fans </li></ul></ul><ul><ul><li>Degree...
Do You Need To Cool Your GH? <ul><li>Fan/Pad Systems </li></ul><ul><li>Fog System (Mist) </li></ul><ul><li>Ventilation </l...
Shade Covers <ul><li>Shade Paint </li></ul><ul><ul><li>Only works on glass </li></ul></ul><ul><ul><li>Cheap </li></ul></ul...
Floors <ul><li>Crushed Rock </li></ul><ul><ul><li>5/8 minus </li></ul></ul><ul><ul><li>Pea gravel </li></ul></ul><ul><li>C...
Pick a Bench, Any Bench!   <ul><li>Materials: </li></ul><ul><li>Wood Lattice (Redwood or Spruce) </li></ul><ul><li>Expand...
Bench Orientation <ul><li>Will the house be open to the public </li></ul><ul><ul><li>Yes?  You better have wide aisles. </...
Work and Storage Areas <ul><li>Head house </li></ul><ul><ul><li>Located on north wall </li></ul></ul><ul><ul><li>Used for ...
Irrigation <ul><li>How will you keep </li></ul><ul><li>Your plants watered? </li></ul><ul><li>Boom Systems </li></ul><ul><...
Fertilizer Injectors <ul><li>Automatic dosing of concentrate fertilizer </li></ul><ul><li>Fertilizer Injectors </li></ul><...
Propagation Area <ul><li>Will you be propagating plants or just growing them on? </li></ul><ul><li>What kind of propagatio...
Modern GH Innovations <ul><li>Retractable Roof Greenhouses </li></ul><ul><li>Root-zone Heating </li></ul><ul><li>Seed Mach...
Greenhouse Management <ul><li>Facilities Maintenance & Repair </li></ul><ul><li>Crop Timing </li></ul><ul><li>IPM </li></u...
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Greenhouse management

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  • Greenhouse management

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

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