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  • 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

Nutrition

Information below focuses on general information on greenhouse and controlled environment crop production nutrition.  More crop specific information on plant nutrition can be found in the drop down menus for specific crop types.

Minnesota soil test standards (Spurway test):
Soilless soil test standards for potted plants and annuals (Erwin, 1998).

General Nutrition:
Greenhouse_nutrition.pdf (Erwin, 1991).
Fertilizer conductivity chart (1991).
​Greenhouse nutrition and phosphorus (Reese, 1991).
​Ounces of fertilizer required per gallon of concentrate for proportioner injector feeding (1991).
​Are your nutrients competing? (Erwin, 1992).
Bedding plant nutrition (Erwin, 1993).
​Nutrient availablity changes with pH (Erwin, 1999).
Basics & beyond:  Comparing substrate fertilizer amendments for spring bedding plants (Mattson, 2014)
Expanding on nutrient management for greenhouse crops (Mattson).

Cheat Sheets:
Biosafe PPM cheat sheet.

Organic Feed Options:
Sustainable production of marigold and calibrachoa with organic fertilizers (Eaton et al., 2013)

Diagnosing Nutrient Disorders:
Diagnosing nutrient disorders in greenhouse crops (Rosen and Erwin, 1993).

Soluble Salts:
Soluble salts (Schwarze, 1994).

Interpreting Soil Tests:
Interpreting soil tests (Erwin, 1991)

Water Acidification:
How to calculate the amount of phosphoric acid needed to neutralize water of a known alkalinity (Munter and Erwin, 1991).
What is water alkalinity (Pasian)

pH Management:
Modeling lime reaction in peat-based substrates (Fisher, Huang and Argo, 2006)
Understanding plant nutrition:  Limestone, calcium and magnesium (Huang, Argo and Fisher, 2008)
​Liming requirements and pH modification for pine wood chips as an alternative to perlite (Owen at al., 2014)
​Advanced pH Management (Paul Fisher, University of Florida presentation).
The effect of root media on root-zone pH, calcium, and magnesium management in containers with impatiens. (Argo and Biernbaum, 1997.  J Amer Soc Hort Sci., 122(2):275-284.
Substrate pH:  Getting it right for your greenhouse crops.  Cornell Coop Ext.).

Controlled Release Fertilizer:
Using controlled release fertilizers to produce garden mums (Catlin and Mattson, 2014)

Lime:
Container substrate-pH response to differing limestone type and particle size.  Huang et al., 2007.  Hortsci., 42(5):1268-1273.
Managing the pH of container media (Fisher and Argo., UNH Cooperative Extension).

Ammonium:
How to avoid ammonium toxicity (Erwin, 1990).

Calcium:
Calcium (Kosla and Ferguson, 1992).
Hydrangea nutrition:  Upper leaf tip necrosis - water stress or calcium? (Whipker, Henry and Landis, 2017)
​
Potassium:
Potassium (Schwarze, 1993).

Magnesium:
Magnesium (Schwarze, 1994).

Iron:
Hydrangea nutrition:  Upper leaf inter veinal chlorosis (iron deficiency) (Landis and Whipker, 2017)

Iron and Manganese Toxicity:
Low pH causes iron and manganese toxicity (Biernbaum, Carlson and Heins. 1988).
Heuchera:  pH induced iron toxicity (Taylor and Whipker, 2017)

Micronutrients:
Managing micronutrients in the greenhouse (Nelson, 1992).
​Magnificent micronutrients (Paterson, 1994).
Micronutrient Disorders (Pasian)

Phosphorus:
Hydrangea Nutrition:  Lower leaf purpling (phosphorus deficiency (Landis, Henry and Whipker, 2017)
Basics & beyond:  Fundamentals of phosphorus nutrition (Whipker, 2013)

Biostimulants:
Prime your plants for success with biostimulants (Jones and Nordstedt, 2020).


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