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Houseplants. Ron Smith, Ph.D. Extension Horticulturist & Turfgrass Specialist. Light is Life. Measurement of Light. 1 Footcandle (fc) Amount of visible light that falls on 1 sq. ft. of surface 1 ft. away from one candle. 1 Lumen Amount of light from one candle.

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Houseplants l.jpg

Houseplants

Ron Smith, Ph.D.

Extension Horticulturist & Turfgrass Specialist



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Measurement of Light

  • 1 Footcandle (fc)

    • Amount of visible light that falls on 1 sq. ft. of surface 1 ft. away from one candle.

  • 1 Lumen

    • Amount of light from one candle.


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Footcandle1 Lumen of light per sq. ft. of area

1'


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3 Major Plant Processes

  • Photosynthesis

  • Phototropism

  • Photoperiodism


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3 Components of Light

  • Intensity

  • Duration

  • Quality


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Chlorophyll

Photosynthesis

Light

Water Vapor

O2

CO2

Water


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Photosynthesis

6CO2 + 6H2O C6H12O6 + 6O2

Chlorophyll

Carbon Dioxide

Water

Oxygen

Glucose


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Light Quality

  • Blue/Violet

    • Promote foliage growth

  • Yellow/Green

    • No effect

  • Red/Far-Red

    • Encourage flowering, elongation, expansion


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Recommended Lighting-Levels

12 Hours Light Period/Day

MinimumRecommended

Low50 f.c. 75-100 f.c.

Medium75-100 f.c. 200(+) f.c.

High200 f.c. 500 f.c.

Very High500 f.c. 1000 f.c.


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3 Types of Artificial Light

  • Filament-Incandescent

    • tungsten halogen

  • Excited Phosphorus

    • fluorescent

  • High-Intensity-Discharge (HID)

    • mercury, metal halide, high pressure sodium, low pressure sodium




Aloe aloe vera l.jpg
AloeAloe vera

http://ww4.bhg.com


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Norfolk PineAraucaria heterophylla

http://ww4.bhg.com


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Umbrella TreeBrassaia


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CaladiumCaladium

http://www.betterphoto.com/gallery/dynoGall2.asp?catID=281


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CrotonCodiaeum variegatum

http://ww4.bhg.com


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Corn PlantDracaena fragrans 'massangeana'


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Persian VioletExacum affine

http://ww4.bhg.com


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Rubber PlantFicus elastica

http://ww4.bhg.com


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HydrangeaHydrangea macrophylla

http://ww4.bhg.com


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Prayer PlantMaranta

http://ww4.bhg.com


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Paper-white NarcissusNarcissus tazetta

http://ww4.bhg.com


Boston ferns nephrolepis exaltata bostoniensis l.jpg
Boston FernsNephrolepis exaltata 'Bostoniensis'

http://ww4.bhg.com


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Swedish IvyPlectranthus

http://ww4.bhg.com


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Mother-in-Law TongueSansevieria

http://ww4.bhg.com


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GloxiniaSinningia speciosa

http://ww4.bhg.com


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Wandering JewTradescantia or Zebrina

http://ww4.bhg.com




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Dumb CaneSunburn




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ScheffleraGhost Ring Virus



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Variegated Spider PlantFluoride Tip Burn


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Layering

Development of roots on a stem while still attached to the parent plant.


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Beneficial Houseplants

Spider Plant

Chlorophytum comosum


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Beneficial Houseplants

Dumb Cane

Dieffenbachia


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Beneficial Houseplants

Dracaena

Dracaena fragrans


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Beneficial Houseplants

Weeping Fig

Ficus benjamina


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Beneficial Houseplants

Rubber Plant

Ficus elastica


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Beneficial Houseplants

English IvyHedera helix


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Beneficial Houseplants

Queen of HeartsHomalomena wallisii


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Beneficial Houseplants

Schefflera

Schefflera arboricola


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Beneficial Houseplants

Peace Lily

Spathiphyllum wallisii


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Low Light Houseplants

Cast-Iron PlantAspidistra elatior


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Low Light Houseplants

Mock StrawberryDuchesnea indica


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Low Light Houseplants

Sliver Net Leaf

Fittonia


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Low Light Houseplants

Tree PhilodendronPhilodendron bipinnatifidum


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Low Light Houseplants

Heart Leaf, Sweetheart Plant

Philodendron scandens


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Low Light Houseplants

Schefflera

Schefflera arboricola


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Low Light Houseplants

Baby Tears

Soleirolia soleirolii


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Low Light Houseplants

Piggyback PlantTolmiea menziesii


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Poisonous Plants

  • Amaryllis -Hippeastrum puniceum (Barbados-Lily and other species)

  • Belladonna Lily- Amaryllis belladonna (Naked-Lady, Pink-Lady, Resurrection-Lily)

  • Boxwood– Buxus microphylla & sempervirens (Box, Boxtree and other species)

  • Buttercups– Ranunculus sp.

  • Caladium– Caladium bicolor and other species

  • Castorbean– Ricinus communis (Castor-Oil Plant, Palma Cristi)


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Poisonous Plants

  • Daffodil– Narcissus pseudonarcissus (Trumpet Narcissus)

  • Dumbcanes– Dieffenbachia sp.

  • Bracken Fern– Pteridium aquilinum (Brake Fern and other species)

  • Four O’ Clock– Miracilis jalapa (Marvel-of-Peru, Beauty-of-the-Night, and other species)

  • Hollies– Ilex sp.

  • Garden Hyacinth– Hyacinthus orientalis

  • Hydrangeas– Hydrangea sp.


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Poisonous Plants

  • Irises– Iris sp. (Flags, Fleur-De-Lis)

  • English Ivy– Hedera helix – and other species

  • Jerusalem-Cherry– Solanum pseudocapsicum

  • Lantanas– Lantana sp.

  • Mistletoes– Phoradendron sp.

  • Narcissus– Narcissus tazetta (Polyanthus Narcissus, Jonquil, and other species)

  • Orleander– Nerium oleander


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Poisonous Plants

  • Philodendrons– Philodendron sp.

  • Poinsettia– Euphorbia pulcherrima (Common Poinsettia, Christmas Flower)

  • Japanese Privet– Ligustrum japonicum (Waxleaf Privet & other species)

  • Rhododendrons, Azaleas– Rhododendron sp.


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Supervised by Ron