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Potted Plants

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Title: Potted Plants


1
Potted Plants Poinsettias Topic 2173 Nick
Wendling
2
The Poinsettia
  • The flower is small and yellow
  • The flower is located in the bracts
  • Bracts are the leaves that give the poinsettia
    their color
  • Poinsettias need short days to develop the
    flower, which is necessary for bract coloring.

3
The Poinsettia
  • Poinsettias should be grown in full sunlight
    during long days to develop leaves and increase
    stem length.
  • The plant develops the flower buds naturally
    during late Sept. and early Oct.
  • The bracts get their color in Nov. and Dec.

4
The Poinsettia

http//www.poinsettiaonline.com/stores/webpage.cfm
?WebPage_ID14DID30
5
Greenhouse Management
  • Factors to Consider
  • Light
  • Temperature
  • Moisture
  • Ventilation
  • Climate


http//www.igcusa.com/ghse.htm
6
Light
  • The greenhouse should be located to receive
    maximum available sunlight.

7
Temperature
  • Day temperature 5 to 10 degrees higher than night
    temperature.
  • Night temp should be 65 degrees with day temp
    being around 70-75 degrees.

8
Moisture
  • Plant growth is dependent on moisture
  • Watering helps to carry dissolved nutrients to
    the plant.
  • The amount needed is dependent on the outside
    conditions. (sunshine or clouds)

9
Ventilation
  • Ventilation is the movement and exchange of air
    in the greenhouse.
  • This ensures proper temperature throughout the
    greenhouse.
  • Helps control relative humidity and plant
    diseases.

10
Planting and Spacing
  • Poinsettias can be grown in any size pot.
  • The size of the pot will determine the overall
    size the plant will grow to.
  • In larger pot sizes, often more than one plant is
    planted. (3 plants in a 6in pot or bigger)

11
Pinching
  • Removal of the terminal bud
  • Four or five nodes should remain
  • Increases the number of bracts per plant
  • Causes the plant to be fuller

12
Soil Mixes
  • Needs to be porous and well drained
  • Soil should be free of insects and diseases
  • Soil should be sterilized at 180 degrees for
    thirty minutes.

13
Fertility
  • Poinsettias require a regular fertility program
  • Use a complete fertilizer (contains Nitrogen,
    Phosphorus, and Potassium)
  • 20-10-20 is a commonly used formulation

14
Growth Regulator
  • Control the height of plant so it stays a
    marketable height.
  • Enhance the color of the bracts so it is more
    desirable.

15
Insects
  • Common insects are whiteflies, mealybugs, spider
    mites, and fungus gnats
  • Can be controlled by chemicals
  • IPM methods can be used for control
  • Keep the greenhouse clean to prevent insect in
    the first place

http//www.corkyspest.com/mealybugs.html
16
Disease
  • Common diseases are root rot and powdery mildew.
  • Can be controlled by use of fungicides
  • Ensuring the soil is clean before planting is
    best way to prevent disease.
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