• Home
  • Commercial Info
    • General Culture >
      • Greenhouse Structures
      • Environment
      • Light and Daylength
      • Temperature
      • Nutrition
      • Water, Media and pH
      • Propagation
      • Weed Control
      • Plant Growth Regulators
      • Pest Control
      • Disease Control
    • Greenhouse Ornamental Crop Production >
      • Seed Propagated Ornamentals and Edibles
      • Vegetatively Propagated Ornamentals
      • Flowering Potted Plant Production
      • Foliage Plant Production
      • Greenhouse Perennial Production
      • Carnivorous Plant Production
    • Outdoor Ornamental Crop Production >
      • Bedding Plants
      • Perennials
      • Outdoor Shrub, Vine and Tree Production
    • Indoor Food/Medicinal Production >
      • Leafy Greens
      • Lettuce
      • Tomatoes
      • Peppers and Eggplant
      • Cucumbers
      • Herbs
      • Fruit
      • Mushrooms
      • Cannabis
      • Aquaponics
      • Other
    • Postharvest Handling
    • New Ornamental and Food Crops
    • Deep Winter Greenhouses and High Tunnels
  • Home Gardening
    • Maryland Fruit and Vegetable Gardening
    • Vegetable Gardening
    • Northern Fruit Gardening
    • Vegetable Pests and Diseases
    • Flowers
    • Perennials
    • Landscape Trees and Shrubs
    • Mushrooms
  • Research
    • Research Partners >
      • Altman Plants Resources >
        • Altman Bonsall & Lodi
        • Altman C & S
        • Altman's Colorado
        • Altmans Plug Connection & Lodi
        • Altmans Salinas
        • Altman Smart Planet
        • Altmans Texas
        • Altman Lake Mathews and Fallbrook
        • Lone Star Growers
        • Altman Tissue Culture
        • Altman Florida
      • Growfilm Information
      • SunSpectrum Information
      • Rocket Farms
      • Green Circle Growers
      • Go Green Agriculture
      • Chef's Garden
    • Past and Current Publications
    • Cacti
    • Succulents
    • Growth Regulators/Retardants
    • Deep Winter Greenhouses/High Tunnels
  • Teaching
    • The Backyard Farmer: The science of food production and preservation
    • Horticulture herbaceous plant identification (HORT 4113)
    • Growing the Guilty Pleasure (HORT 3480)
  • Victory Garden
  • Home
  • Commercial Info
    • General Culture >
      • Greenhouse Structures
      • Environment
      • Light and Daylength
      • Temperature
      • Nutrition
      • Water, Media and pH
      • Propagation
      • Weed Control
      • Plant Growth Regulators
      • Pest Control
      • Disease Control
    • Greenhouse Ornamental Crop Production >
      • Seed Propagated Ornamentals and Edibles
      • Vegetatively Propagated Ornamentals
      • Flowering Potted Plant Production
      • Foliage Plant Production
      • Greenhouse Perennial Production
      • Carnivorous Plant Production
    • Outdoor Ornamental Crop Production >
      • Bedding Plants
      • Perennials
      • Outdoor Shrub, Vine and Tree Production
    • Indoor Food/Medicinal Production >
      • Leafy Greens
      • Lettuce
      • Tomatoes
      • Peppers and Eggplant
      • Cucumbers
      • Herbs
      • Fruit
      • Mushrooms
      • Cannabis
      • Aquaponics
      • Other
    • Postharvest Handling
    • New Ornamental and Food Crops
    • Deep Winter Greenhouses and High Tunnels
  • Home Gardening
    • Maryland Fruit and Vegetable Gardening
    • Vegetable Gardening
    • Northern Fruit Gardening
    • Vegetable Pests and Diseases
    • Flowers
    • Perennials
    • Landscape Trees and Shrubs
    • Mushrooms
  • Research
    • Research Partners >
      • Altman Plants Resources >
        • Altman Bonsall & Lodi
        • Altman C & S
        • Altman's Colorado
        • Altmans Plug Connection & Lodi
        • Altmans Salinas
        • Altman Smart Planet
        • Altmans Texas
        • Altman Lake Mathews and Fallbrook
        • Lone Star Growers
        • Altman Tissue Culture
        • Altman Florida
      • Growfilm Information
      • SunSpectrum Information
      • Rocket Farms
      • Green Circle Growers
      • Go Green Agriculture
      • Chef's Garden
    • Past and Current Publications
    • Cacti
    • Succulents
    • Growth Regulators/Retardants
    • Deep Winter Greenhouses/High Tunnels
  • Teaching
    • The Backyard Farmer: The science of food production and preservation
    • Horticulture herbaceous plant identification (HORT 4113)
    • Growing the Guilty Pleasure (HORT 3480)
  • Victory Garden

Contact Info:

John Erwin
Professor and Chair, Department of Plant Science and Landscape Architecture
University of Maryland
2104 Plant Sciences Building, 4291 Fieldhouse Dr., College Park, MD 20742-4452
​jerwin@umd.edu
​301-405-6244/612-385-6863
This site was developed by John Erwin in the Department of Plant Science and Landscape Architecture at the University of Maryland in College Park.  Please feel free to submit comments below, or email me here, or give me a call at 301-405-6244 if you have any question, comments and/or suggestions!  Thanks for visiting our site!

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