Coping with Drought in the Landscape
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Transcript of Coping with Drought in the Landscape
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Coping with Drought in
the Landscape
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http://drought.tbo.com/
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http://enso.unl.edu/ndmc/impacts/us/usimpact.htm#florida
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http://www.cpc.ncep.noaa.gov/products/expert_assessment/
seasonal_drought.html
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Coping with Drought
Considerations:Irrigation Priorities/PracticesCultural PracticesPest ManagementSpecific Practices for TurfSpecific Practices for Bedding Plants,
Shrubs and TreesDRASTIC MEASURES!
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Coping with Drought
Irrigation Priorities Irrigate highly visible
and intensively managed areas first
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Coping with Drought
Irrigation Priorities Drought sensitive plants should have
high priority, but turf should have lower priority since turf is less costly to replace
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Coping with Drought
Irrigation Practices Water when irrigation restrictions allow,
or early in the morning Irrigate deeply at long intervals (to
thoroughly moisten the root zone) rather than frequent, shallow waterings
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Coping with Drought
Irrigation Practices Install a rain shut-off device on permanent
irrigation systems, or check to make sure the existing device works properly and is not blocked by vegetation or structures
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Coping with Drought
Irrigation Practices Examine the irrigation system to check for
clogging and repair leaks
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Coping with Drought
Cultural Practices Avoid practices that stimulate
growthDon't fertilizeAvoid routine pruning
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Coping with Drought
Pest Management Keep weeds under control
(weeds compete for water!) Watch for insect and disease problems
(spider mites, borers, powdery mildew, vascular wilts)
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Coping with Drought:Specific Practices for Turf
Irrigate turf only after signs of wilting
Stop irrigating Bahiagrass and allow it to go dormant
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Coping with Drought:Specific Practices for Turf
Raise the cutting height of turfMow less frequentlyKeep the mower blade sharp!
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Specific Practices for Bedding Plants, Shrubs and
Trees
Add mulch to beds so that the final depth is 2 to 3 inches after settling
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Specific Practices for Bedding Plants, Shrubs and
Trees
Enlarge beds to reduce tree/shrub root competition from grass
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Specific Practices for Bedding Plants, Shrubs and
Trees
Avoid using overhead sprinklers for shrub and flower beds (about 65% of overhead irrigation can be wasted by evaporation and wind dispersal)
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Specific Practices for Bedding Plants, Shrubs and
Trees
Consider installing a micro-irrigation system (these are often exempt from irrigation restrictions)
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Specific Practices for Bedding Plants, Shrubs and
Trees
Irrigate trees and shrubs ONLY after they start to wilt
Watch “Indicator Plants” for signs of wilting: Azalea Gardenia Hydrangea Dogwood
Hibiscus Impatiens Japanese maple Trumpet tree (Datura)
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Coping with Drought: DRASTIC MEASURES!
Only irrigate plants upon severe wilting
Remove weak orless desirable plants
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Coping with Drought: DRASTIC MEASURES!
Thin dense beds of plants (i.e., remove every other plant)
Prune woody plants severely to reduce leaf area
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Coping with Drought: DRASTIC MEASURES!
Apply chemical wetting agents to areas of the landscape where the soil has become hydrophobic (water runs off rather than is absorbed by soil)
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Coping with Drought: Summary
Irrigate highly visible areas and drought-sensitive plants first
Water when legal but irrigate deeplyUse a rain shut-off device and
check/repair the irrigation system Avoid practices that stimulate growthKeep weeds under control and watch for
pests
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Coping with Drought: Summary
Irrigate turf, shrubs and trees only after wilting (watch indicator plants)
Raise the mowing height Mow less frequently with a sharp bladeStop irrigating bahiagrassEnlarge beds and add mulchAvoid using overhead sprinklers Install a micro-irrigation system
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Coping with Drought: DRASTIC MEASURES!
SummaryOnly irrigate plants upon severe
wilting Remove weak plants Thin dense beds of plants Prune severely to reduce leaf
area Apply chemical wetting agents
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Coping with Drought in
the Landscape
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Institute of Food and Agricultural SciencesNorth Florida Research and Education Center - Quincy and Monticello
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Developed by
Gary W. KnoxUniversity of Florida/IFAS
North Florida Research and Education Center
STP-204“Coping with Drought in the
Landscape”