Greenhouse Grow How
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Transcript of Greenhouse Grow How
Greenhouse Grow HowCreated by: Brigitte Zettl
Introductions• Why are you here?• What are you growing?• When are you growing it?
• An earlier season• Efficient use of time• More control
Why Start Plants in a Greenhouse?
Let’s Start With Basics…How Do We Enhance This Effect?• Choice of flooring• Choice of covering• Positioning of the
structure
Light
What Kind of Structure is Right for You?
www.hobby-greenhouse.com
Something a Bit Larger Perhaps?
Our Gutter-Connected Raised Quonsets
State of the Art Greenhouse Technology
Creating the Perfect Environment
ENVIRONMENTAL CONTOL
TEMPERATURE
LIGHTAIR
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 high4000 – 5000 = Full Sun1800 – 4000 = Dappled Sunlight1000 – 1800 = Shade<1000 = Deep Shade
PhotoperiodismSome 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)
Airflow
Natural Ventilation
Forced Air Ventilation
VentilationPositives
• Releases moisture in the air
• Replenishes CO2 • Reduces disease
Negatives
• Increases pest exposure
• Increases time/money spent
• Can expose plants to cold temperatures by accident
TemperatureGoals• 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
TemperatureCooling• Ventilation• Fogging• Shade or Shade Cloth
TemperatureHeating• Insulation• Heat Sinks• Decomposing Materials• Radiant Heat• Natural Gas
Giving Plants What They Need
CULTURE
CONTAINERS &
MEDIA
FERTILIZERIRRIGATION
What You’re Growing In…Soiless Mix
Considerations:• Aggregate Size• Microbial Content• Nutrient Content• pH Appropriate• Proper Mixing
Procedure
Containers
• Right Size Right Plant!• Reuse = Sterilize!– Vinegar– 10% Bleach– Hydrogen Peroxide– Ethanol
Plant NutritionMacro Nutrients• Nitrogen• Phosphorus• Potassium• Calcium• Magnesium• Sulfur
Recommended Fertilizers:Garden Tone / Plant ToneFish FertilizerSeaweed/KelpWorm Castings
Irrigation• Automated • Hand Watering• Watch the edges!• Seeds need special
attention!
Propagation
Keeping Records
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!!!
Our Germination Chamber
Asexual PropagationTypes• Budding • Cutting • Division • Grafting • Layering• Tissue Culture
Tool’s You May Need
• Sterilizing Solution• A Very Sharp Knife• Rooting Solution
Taking CuttingsWoody Plants
• Softwood (Spring)• Semi-Ripe (Summer &
Fall)• Hardwood (Winter)
Herbaceous Plants
• Whole leaf (succulents)• Part Leaf (begonia)• Leaf-Bud • Root/Tuber
Benches
Integrated Pest Management• Set Thresholds• Monitor & Identify
Pests• Prevention • Control• Evaluation - Assess• Implementation – be
Proactive!
Integrated Pest Management
Monitoring for Greenhouse PestsTools You Will Need:• Lighted Magnifier• Sticky Traps• A Good ID Book• A Notebook & Pen• The Internet• Your Local Extension
Agents Phone Number
Common OffendersAphids Cabbage Loopers
Common OffendersFungus Gnats Crickets
Common OffendersWhiteflies Thrips
Common OffendersRhizoctinia Downy Mildew
Common OffendersRoot/Crown Rot Phytopthora
Bacterial Leaf Spot (Septoria)
Recommended ReadingI.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 3402Propagation• The American Horticultural Society, Plant Propagation; A.
Toogood (Editor)• Seed to Seed; Suzanne Ashworth