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Indoor Plants

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  1. Indoor Plants A Unit of the MSU Extension Master Gardener Volunteer Training Program

  2. Selecting Interior Plants • Insect & disease free. • Healthy-looking from top to bottom. • Match plant to indoor conditions.

  3. Transporting • Hot summer. • Cold winter.

  4. Acclimatization • Moving Plants. • Moving plants inside in winter. • Moving plants outside in spring.

  5. Plants as Air Cleaners • Absorb air pollutants. • Both the plant and the potting medium absorb the pollutants.

  6. Environmental Factors • Light. • Temperature. • Flowering. • Humidity. • Ventilation.

  7. Light • Most essential factor for indoor plant growth. • Three aspects of light to consider. • Intensity. • Duration. • Quality.

  8. Indoor Light Intensity Varies • Location/Distance from source. • Time of day. • Latitude. • Time of year. • Cloud density.

  9. Light Conditions

  10. Light Requirements for Selected Indoor Plants

  11. Light Quality

  12. Photoperiodic Response (Duration) • Short-day plants. • Poinsettia, kalanchoe & Christmas cactus. • Long-day plants. • Cineraria. • Day-neutral plants. • African violet.

  13. Supplemental Light • Quality of light. • Fluorescent vs. Incandescent.

  14. Incandescent vs. Fluorescent

  15. Grow Lights

  16. Temperature • Affects productivity and plant growth. • Manipulates flowering and plant height. • Foliage Plants. • Day: 70 to 80° F. • Night: 60 to 68° F. • Flowering. • Day: 70 to 80° F. • Night: 55 to 60° F.

  17. Flowering • Two critical stimuli that induce flowering. • Day length. • Temperature.

  18. Day Length • Short-day plants. • Long-day plants. • Day-neutral plants.

  19. Temperature/Day Length • Cool temperature/short-day. • Cool temperature/long-day. • Cool temperature/day-neutral. • Warm temperature/short-day. • Warm temperature/day-neutral.

  20. Humidity • Percent of the moisture saturation of air. • Generally, 40% will be sufficient. • 10 - 15% typical in Michigan homes in winter.

  21. Humidity • Increasing humidity: • Humidifiers. • Humidity trays. • Misting.

  22. Humidifier

  23. Humidity Tray

  24. Misting

  25. Ventilation • Drafts. • Forced warm air heat. • Cold drafts - windows & doors.

  26. Containers • Clay & ceramic. • Plastic & fiberglass. • Others.

  27. Clay & Ceramic

  28. Plastic & Fiberglass

  29. Other

  30. What must all indoor plant pots have?

  31. Drainage

  32. Media • Artificial mixes. • Soil mixes for certain plants. • Sterilizing or pasteurizing.

  33. Preparing Artificial Mixes • Sphagnum Peat Moss. • Perlite or Vermiculite. • Ground Lime. • Superphospate. • 12-12-12 or something similar. • Chelated Iron.

  34. Repotting

  35. Repotting

  36. Repotting

  37. Watering • When to water. • Water quantity. • Water quality. • Methods of application. • Special considerations.

  38. Fertilizing • Advantages. • Disadvantages. • Timing of applications.

  39. Training and Grooming • Pinching. • Pruning. • Disbudding. • Training on trellises. • Cleaning.

  40. Indoor Plant Problems • Physiological Disorders. • Insect. • Mites. • Diseases.

  41. Physiological Disorder Excess Soluble Salts

  42. Physiological Disorder Sun Scald

  43. Physiological Disorder Temperature Extremes Heat Cold

  44. Physiological Disorder Over or Under Watering?

  45. The plants we use for house plants are subject to the same insect and disease pests as any other plants.

  46. Aphids. Spider mites. Whiteflies. Scale. Mealy bugs. Fungus gnats. Insect Pest