Notes
Slide Show
Outline
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Conditioning and Storing Cut Flowers and Greens
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Long lasting flowers
  • important
  • pleases customer
  • happy customers return to the florist when they need flowers in the future
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Chain of Life
  • developed by the Society  of American Florists
  • Helps growers, wholesalers, and retailers lengthen the life of flowers
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Chain of Life
  • provide information on proper care and handling throughout the marketing chain
  • proper care and handling results in longer lasting flowers
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Flower deterioration
  • Low water absorption
  • most flower stems are at least partially blocked when they arrive at the retail florist
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Causes of blockage
  • cutting stems with dull tools
  • cut with shears that pinch the xylem (water conducting tubes in the stem)
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Causes of blockage
  • bacteria or minerals in the water clog the stem
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Causes of blockage
  • air can enter the stems at the time of cutting and partially block the stem
  • can become so severe that flowers wilt in their container
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Loss of water
  • transpiration
  • process by which plants lose water through their leaves
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Transpiration
  • gases and water vapor move from an area of greater concentration to an area of lesser concentration
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Loss of Water
  • water vapor moves out of the plant through the stomata (stomates)
  • tiny openings in the underside of the leaf
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Loss of Water
  • flowers wilt when moisture is lost through transpiration quicker than it is taken in through the stems.
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Loss of Water
  • occurs more rapidly at higher temperatures
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Loss of food
  • flowers are still living and need a source of food
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Loss of food
  • flowers continue to photosynthesize after they are cut
  • must be given the proper light and a source of sugar


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Disease
  • Botrytis
  • a fungus which causes brown spots on petals
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Botrytis
  • do not allow flowers to get wet before putting them in the cooler
  • allow wet flowers to dry before putting in the cooler
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Ethylene Gas
  • naturally occurring gas in flowers that speed maturity
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Ethylene Gas
  • causes rapid deterioration of cut flowers
  • many sources of ethylene gas
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Ethylene Gas
  • fruit, especially apples
  • diseased or injured flowers
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Ethylene Gas
  • rotting foliage below the water line
  • exhaust fumes from cars
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Symptoms of ethylene
  • premature death
  • flower and petal drop
  • yellowing of foliage


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Symptoms of ethylene
  • loss of foliage
  • upward cupping of petals - known as sleepiness in carnations.
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Water quality
  • Hydrationà process where flowers draw water and nutrients up their stems to the leaves and flowers through capillaries
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Water Quality
  • pH
  • measure of acidity or alkalinity on a scale from 0-14 with 7 being neutral
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pH
  • pH of 3.2  - 4.5 maximizes hydration
  • floral preservatives commonly added to prolong flower life lower the pH
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Total Dissolved Solids
  • TDS
  • measure of the dissolved salt and minerals
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TDS
  • some minerals are beneficial to flowers
  • floral preservatives are formulated for varying water types and pH’s
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Conditioning flowers
  • techniques of treating flowers to extend their life.
  • Begins when flowers arrive from the wholesaler
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Unpacking
  • as soon as they arrive
  • loosen paper or plastic sleeves which they have been wrapped in
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Unpacking
  • flowers will expand as they mature
  • flowers will be crushed if the sleeves are not loosened.
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Unpacking
  • do not loosen sleeves on roses
  • customers prefer roses in the bud stage
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Unpacking
  • check for signs of disease, damage or wilting
  • remove damaged or diseased flowers from the bunch before storage
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Unpacking
  • excessive damage should be reported to the wholesaler
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Re-cut the stems
  • stems are cut with a knife rather than shears (or sharp shears can be used)
  • shears can pinch the xylem tubes causing partial blockage
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Re-cut the stems
  • cut stems on a slant
  • this helps them to absorb more water
  • prevents the stems from sealing to the bottom of the container
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Re-cut the stems
  • stems should be cut under warm water
  • warm water contains less air than cold water
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Remove lower foliage
  • remove all foliage from stems that would be underwater in the storage container
  • foliage left underwater will decay and lead to bacterial growth
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Remove lower foliage
  • rotting foliage clogs the stems and releases ethylene gas
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Remove lower foliage
  • use a glove or rag to pull the leaves off quickly down the stem
  • remove outside or damaged petals on roses
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Clean Containers and Cooler
  • containers for flower storage should be cleaned with hot detergent solution, disinfected with bleach and thoroughly rinsed
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Clean Containers and Cooler
  • a 10% bleach solution is used for disinfecting the containers
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Clean Containers and Cooler
  • there are commercial products available that disinfect, clean and deodorize in one step
  • Non-metallic containers should be used
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Metal Containers
  • decrease the effectiveness of preservatives
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Containers
  • should be short enough so that the flowers do not come in contact with the sides of the container
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Preservatives
  • Place a warm preservative solution in the container prior to adding flowers
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Preservatives
  • temperature of the solution should be between 100 degrees and 110 degrees Fahrenheit
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Preservatives
  • extend the life of flowers in three ways:
    • provide a food source needed for respiration
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Preservatives
    • contain sugar which flowers use to manufacture food to replace that lost through respiration
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Preservatives
    • provide an acidifier which lowers the pH of the water
      • water moves through the vascular system of the flower at a pH of 3.5
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Preservatives
  • Acidic solution reduces bacterial action
  • contain a bactericide which kills bacteria
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Preservatives
  • can be purchased in either liquid or powder form
  • follow directions for mixing the preservative
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Preservatives
  • too much preservative can burn the flower
  • too little will not be enough to keep flowers fresh
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Allow flowers to absorb H2O
  • all flowers except roses should remain in the warm preservative solution outside the cooler for one to two hours
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Allow flowers to absorb H2O
  • roses should be stored in the cooler immediately
  • this treatment allows flowers to absorb the maximum amount of water
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Allow flowers to absorb H2O
  • at the end of this time for water absorption, the flowers should feel turgid - full of water
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Allow flowers to absorb H2O
  • flowers that are shipped in the bud stage such as gladioli, lilies, and carnations could sit at room temperature overnight to open up