Download Fertility in the Japanese Garden

Fertility in the Japanese
Garden
by Jacob Deaver
http://paulwinger.zenfolio.com/img/s2/v60/p1090273278-3.jpg
Background
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Designed 1985
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Landscape architect
Koichi Kawana
24 varieties of shrubs
20 varieties of trees
3 ground covers
Waterfall, Japanese
Lanterns, Garden
House, etc.
http://www.arboretum.umn.edu/UserFiles/Image/Japanese1.jpg
Problem & Possible Causes
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Austrian pines
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Chlorotic
Iron deficiency
Relatively high soil pH
Lab tests show soil pH of
6.4-6.9
 Results likely skewed
by mulch
 Ideal pH 4.0-7.0
according to Bartlett
Soil compaction
Samples sent to UMN for
testing
http://4.bp.blogspot.com/B1_re_jv9sw/TqXLErBCfoI/AAAAAAAAQmA/pb
mfvwb7IBE/s320/pine.jpg
Research
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Foliar feeding?
Short-term, “quick fix” solution
o Potential negative impact on water quality
o “Sprint” used by Dan Miller on Korean pines
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Chelated Iron supplement?
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Suggested by Carl Rosen at UMN
 Professor & Department Head - Soil, Water, &
Climate
 Not permanent but provides big nutrient boost
Lower soil pH?
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Amend soil with sulfur or iron sulfate
Makes iron more accessible to plants
Long-term solution
Recommendations
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Short term:
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-Use chelated iron in soil around pines to give
nutrient boost
 Gempler’s Chelated Iron Supplement
Avoid foliar sprays
 Generally considered ineffective for nutrient
deficiencies
 Potential negative impact on koi pond from drift
Long term:
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-Amend soil with sulfur or iron sulfate
 lower pH and make iron in soil more accessible
to plants
Address soil compaction
Resources
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Expertise
Jewel Engstrom & Mary
Bigelow
o Dan Miller
o Carl Rosen
o Sadafumi Uchiyama
o Mary Meyer
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Other resources
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http://www.bartlett.com/res
ources/Plant-Health-CareRecommendations-forAustrian-Pine.pdf
http://gcrec.ifas.ufl.edu/vtgcrec/pages/BOK%20TOWER%2
0SANCTUARY/BOK%20TOWER-BC-3-19-03/Bok-BCJapanese%20lantern.JPG