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Recovering the Flooded Landscape Tennessee Master Gardeners.

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Presentation on theme: "Recovering the Flooded Landscape Tennessee Master Gardeners."— Presentation transcript:

1 Recovering the Flooded Landscape Tennessee Master Gardeners

2 Ashland City Courtesy of Ashland City Times

3 Kingston Springs Courtesy of Ashland City Times

4 Residence Courtesy of Ashland City Times

5 Welcome to Ashland City Courtesy of Ashland City Times

6 First Things First :  Be aware of personal safety (downed power lines, sewage-contaminated water, displaced wildlife)  Attend to your damaged home  Document damage and report to insurance company, TEMA/FEMA

7 The Clean Up :  Is the site dry enough to enter?  Thick silt will cover the landscape & may have a raw sewage-like odor  Caused by lack of oxygen in the soil  When dry, remove trash, debris & uprooted plants  Separate home trash from yard waste—place in designated place for pick up

8 Your Landscape May Recover! :  Established plants have a good chance of survival  Many plants will look dead, but don’t pull them out unless physically damage is major  Known to survive after 2 weeks under water:  Native trees  Native shrubs  Native perennials  Hardy bulbs

9 Plants at Risk (don’t like “wet feet”):  Japanese Holly  Japanese Boxwood  Indian Hawthorn  Nandina  Hybrid Junipers  Hybrid Azaleas Encore Azalea

10 Plants Most Likely to Survive:  Crape Myrtles  Chinese Holly  Casissa Holly  Burford Holly Burford Holly & Crape Myrtles 3 months after flood

11 Plants Most Likely to Survive: Crape MyrtleChinese Holly

12 Deciduous & Evergreen Plants :  Most deciduous plants will defoliate immediately after a flood  Before pruning, wait to see if bare branches bud out in next month or two  Hardy evergreens (like Chinese Hollies) may hold their leaves  Washing the silt off evergreens will aid their survival (do not pressure wash)  Cover any exposed roots  Apply fresh mulch (never use fresh hardwood mulch)

13 Trees :  Remove excess silt and soil from trunks and crowns  Cover any exposed roots  Remove broken or damaged limbs  Wait to see if bare branches start to bud out in next month or two  Apply fresh mulch (never use fresh hardwood mulch)  Trees may experience a forced dormancy due to flood shock & lack of soil oxygen  Leaves will turn yellow & drop off, and some branch die-back may occur

14 Trees :  Trees may experience a forced dormancy due to flood shock & lack of soil oxygen  Leaves will turn yellow & drop off, and some branch die-back may occur

15 Anticipate:  Plants will be stressed  Poor growth  More diseases  Wet soils encourage root and crown diseases (fungi)  Fusarium spp.  Phytopthora spp.  Pythium spp.  Rhizocotonia solani  Improve site drainage  Helps reduce stress and disease  Replace lost soils with organic matter

16 Nutrients:  Avoid excessive nutrients during recovery  High nitrogen fertilizers are not beneficial to trees & shrubs at this time  Excessive fertilization can increase diseases  Take a soil sample to determine needs  Organic matter replaces lost soil microbes as well as slow-release nutrients

17 Your Flooded Garden:

18 Gardens:  Food Safety!!  Flood waters are contaminated with raw sewage  Handle with caution  Eating leafy or bulb/root vegetables should be avoided Spinach or lettuce Garlic, onions, radishes  Some vegetables are less risky if they can be boiled Turnips  Visit http://foodsafety.gov for more information on food preparation & safetyhttp://foodsafety.gov

19 Newly Seeded Gardens:  Most did not survive the flood, or were washed away  The good news? We have much of the growing season left to start over  Let soil dry out completely--working wet soils leads to large dirt clods and future soil compaction  Add amendments, composted organic matter, straw and mulch

20 Flooded Turfgrass: Golf CourseAthletic Field—after flood

21 Turf & Lawn Areas:  Most resilient to flooding:  Bermuda grass  Bahia grass  Hybrids of the above  Bermuda grass, under 4 weeks of floodwater, has responded with re-growth after drying out  First, remove sediment, silt, organic debris  Mow, removing only 1/3 of height  Apply 1/2 lb. of nitrogen per 1,000 sf – will encourage turf recovery  Follow normal maintenance practices

22 Sprinkler Systems:  Turn off power & inspect electrical systems  Replace irrigation clock if it was flooded  Have backflow prevention system inspected by a professional  Shut off water supply, open drain valve, drain water from underground pipes  Rotors—remove, shake out, & rinse  Flush the pipe system before replacing the heads

23 Sprinkler Systems (cont):  Open valves one at a time to full open position & turn system on manually  Run water for 5 minutes at each zone  Reinstall heads & run system for 10 minutes  Turn off water & be sure all heads retract  Replace heads not working properly

24 Patience  Salvaging a flooded landscape can be economically feasible if you have the time & patience  Let your plants return naturally  Replant with native species

25 Nature’s resilience will amaze you

26 Websites for Additional Information:  http://www.extension.org/pages/Recovering_the_Flooded _Landscape  http://utextension.tennessee.edu/Pages/default.aspx  http://fcs.tennessee.edu/nutrfdsfty/safefd/index.htm  Facebook: Tennessee Master Gardener page

27 Thank You Nancy Coop, Cheatham County MG


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