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Indoor Plants. A Unit of the MSU Extension Master Gardener Volunteer Training Program. Selecting Interior Plants. Insect & disease free. Healthy-looking from top to bottom. Match plant to indoor conditions. Transporting. Hot summer. Cold winter. Acclimatization. Moving Plants.
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Indoor Plants A Unit of the MSU Extension Master Gardener Volunteer Training Program
Selecting Interior Plants • Insect & disease free. • Healthy-looking from top to bottom. • Match plant to indoor conditions.
Transporting • Hot summer. • Cold winter.
Acclimatization • Moving Plants. • Moving plants inside in winter. • Moving plants outside in spring.
Plants as Air Cleaners • Absorb air pollutants. • Both the plant and the potting medium absorb the pollutants.
Environmental Factors • Light. • Temperature. • Flowering. • Humidity. • Ventilation.
Light • Most essential factor for indoor plant growth. • Three aspects of light to consider. • Intensity. • Duration. • Quality.
Indoor Light Intensity Varies • Location/Distance from source. • Time of day. • Latitude. • Time of year. • Cloud density.
Photoperiodic Response (Duration) • Short-day plants. • Poinsettia, kalanchoe & Christmas cactus. • Long-day plants. • Cineraria. • Day-neutral plants. • African violet.
Supplemental Light • Quality of light. • Fluorescent vs. Incandescent.
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.
Flowering • Two critical stimuli that induce flowering. • Day length. • Temperature.
Day Length • Short-day plants. • Long-day plants. • Day-neutral plants.
Temperature/Day Length • Cool temperature/short-day. • Cool temperature/long-day. • Cool temperature/day-neutral. • Warm temperature/short-day. • Warm temperature/day-neutral.
Humidity • Percent of the moisture saturation of air. • Generally, 40% will be sufficient. • 10 - 15% typical in Michigan homes in winter.
Humidity • Increasing humidity: • Humidifiers. • Humidity trays. • Misting.
Ventilation • Drafts. • Forced warm air heat. • Cold drafts - windows & doors.
Containers • Clay & ceramic. • Plastic & fiberglass. • Others.
Media • Artificial mixes. • Soil mixes for certain plants. • Sterilizing or pasteurizing.
Preparing Artificial Mixes • Sphagnum Peat Moss. • Perlite or Vermiculite. • Ground Lime. • Superphospate. • 12-12-12 or something similar. • Chelated Iron.
Watering • When to water. • Water quantity. • Water quality. • Methods of application. • Special considerations.
Fertilizing • Advantages. • Disadvantages. • Timing of applications.
Training and Grooming • Pinching. • Pruning. • Disbudding. • Training on trellises. • Cleaning.
Indoor Plant Problems • Physiological Disorders. • Insect. • Mites. • Diseases.
Physiological Disorder Excess Soluble Salts
Physiological Disorder Sun Scald
Physiological Disorder Temperature Extremes Heat Cold
Physiological Disorder Over or Under Watering?
The plants we use for house plants are subject to the same insect and disease pests as any other plants.
Aphids. Spider mites. Whiteflies. Scale. Mealy bugs. Fungus gnats. Insect Pest