5 17 plant growing environment
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Transcript of 5 17 plant growing environment
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PlantsGrowing Environment
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Landscape Plant Needs
Appropriate TemperatureHardiness Zones
Appropriate Amount of lightFull Sun – Full Shade
Appropriate Amount of waterDrought tolerant to water plants
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Hardiness Zones
A geographically-defined area in which a specific category of plant life is capable of growing, based on it's ability to withstand the minimum temperatures of the zone.
How cold it gets in winter
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US Hardiness Zones
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Hardiness Zones
Virginia
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USDA ZONE 7a
Zones are designated by lowest expected temperatures during winter
Zone #s are in increments of 10 A & B designation are in increments of 5
So if you buy a flower with a hardiness of 8, will it make it through the winter here?
How about if it is 5?
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Thermoperiod
Thermoperiod refers to daily temperature change.
Plants produce maximum growth when exposed to a day temperature that is about 10 to 15°F higher than the night temperature.
Plants photosynthesize (build up) and respire (break down) during an optimum daytime temperature
Slower respiration during a cooler night Greenhouses program temperature for
thermoperiods
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Vernalization Requirement of plants to go through a
period of cold before they can flower.
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Photoperiod
The relative lengths of alternating periods of darkness and light affecting the growth and maturity of plants esp. flowering and dropping of leaves.
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The Light Spectrum
Plants only use radiation energy in the visible spectrum.
Chlorophyll does not absorb in the green spectrum
Why?
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Photoperiods
Equinox – Fall & SpringEqual hours of day and nightSpring equinox Mar 21 or 22Fall equinox Sept 21 or 22
Solstice – Winter & SummerWinter – Shortest daySummer – Longest day
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Plants Short-day plants- don’t flower in summer
ChrysanthemumsPoinsettiasCoffee
Long-day plants- only flower in summerGrains, Carnations
Day neutral plants – photoperiod doesn’t matter
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Exposure
Shade: No or only early morning sun Part shade: site that gets only 2 to 6 hours
of direct sun each day. Part sun: same as part shade but includes
more afternoon sun. Full sun: at least 6 hours of sun per day
including noon.
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Sun-loving plants
Sunflowers
Marigolds
Geraniums
Roses
Ornamental Grasses
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Shade loving plants
Hostas
Impatiens
Caladiums
Fox glove
Coral Bells
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Part-shade
Hydrangea Azalea Lenten Rose Astible Begonias
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Practice
Slides Outside Plant ID quiz on Friday
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Azalea
Spring Flowering Shrub Part shade
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Hydrangea
Spring Flowering Shrub Part shade
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Knock-out Rose
Summer flowers Shrub Full Sun
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Forsythia
Spring Flowering Shrub Full sun
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Winged Euonymus
Fall Foliage Shrub Full sun
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Periwinkle
Spring-summer flowers Ground cover Shade – part shade
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Ajuga
Spring Flowers Ground Cover Part – full shade
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Winter Creeper
No flowers Ground cover Full sun to full shade
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Pachysandra
Ground cover Full shade
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Liriope
Border Small flowers Part shade
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Hosta
Summer flowers Part shade
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Coral Bells - Heuchera
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Sedum
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Fountain Grass
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Geranium
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Marigold
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Impatiens
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Begonia
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Pansy