You're Putting What in That Pot?: Eastern Redcedar as a Pine Bark Alternative

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Oklahoma Nursery and Landscape Association …

Oklahoma Nursery and Landscape Association
Fall Update
October 25, 2013
Stillwater, OK

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  • 1. You’re Putting What in That Pot? Eastern Redcedar as a Pine Bark Alternative { Dr. Cheryl R. Boyer Assistant Professor and Extension Specialist, Ornamental Nursery Crops Kansas State University
  • 2.     Small, growing industry Buy Local Need for regional nursery crop production support Limited Resources Great Plains Region
  • 3. We can help with substrates! { But wait, Kansas has forests?
  • 4. Yes, Kansas has Forests.
  • 5. 2005 Kansas Forests Survey (January 2008)  Highlights  Forest land area increased from 1.5 million acres in 1994 to 2.1 million acres in 2005, representing about 4% of Kansas total land area.     Softwood = 5% Oak/Hickory = 56% Elm/Ash/Cottonwood forest types = 32% Almost 95% of Kansas forest land is held by private landowners.
  • 6. Areas of Concern  Since 1965  Oak growing stock has increased by 231%  Hickories by 224%  Maples by 231% and  Eastern redcedar has increased by 23,000% (this is understated since they did not include 50,000 acres of small caliper (under 1”) of eastern redcedar seedlings) 23,000% !!!
  • 7. Eastern Redcedar  Most material is in low density stands.  Is expanding throughout the Midwest  Suppression of fire  Reduction of grazing on pastureland  First species to invade old fields  50,000 acres of seedlings = more expansion
  • 8. Eastern Redcedar  Good wildlife cover, BUT  Reduces understory diversity and plant growth  Redcedar establishment changes the ecological character of the site.  Major water usage (30 gal. per tree per day)  FIRE!
  • 9. Alright, so There is Plenty { How have we used it?
  • 10. John C. Pair Horticultural Research Center (Haysville, near Wichita) Jason Griffin, Director Cheryl Boyer Graduate Students Zach Starr Michelle Morales Josh Pool Matthew Travis Carmichael Wilson Technicians Tami Myers Kory Nickell Mike Shelton
  • 11. Pine Bark 3/16 - inch Redcedar 3/8 - inch Redcedar 1/2 - inch Redcedar 3/4 - inch Redcedar
  • 12. 2009    ¾” redcedar Low or High Fertilizer % Sand % Redcedar Fertilizer 20 0 Low 20 5 Low 20 10 Low 20 20 Low 20 40 Low 20 Woody Plants  Baldcypress  Chinese Pistache  Baldcypress 80 Low 20 0 High 20 5 High 20 10 High 20 20 High 20 40 High 20 80 High
  • 13. 2010  Annual Plants  Vinca  Petunia  New Guinea Impatiens  3/16” redcedar % Perlite % Peat % Redcedar 25 75 0 25 50 25 25 0 75 0 0 100
  • 14. 2010  Woody Plants  2 trees Baldcypress  Redbud % Sand Main Substrate (80%) 20 Pine Bark 20 3/16” Redcedar 20 3/8” Redcedar 20 ½” Redcedar 20 ¾” Redcedar   2 shrubs Spirea  Crapemyrtle   2 perennials Maidengrass  Black-eyed Susan 
  • 15. 3/16”
  • 16. What Else Might We Use?  Scrubby/Weedy Plants  Maclura pomifera (Hedge Apple, Osage Orange)  Elm  Honeylocust  Woody biomass residue from wood manufacturing companies and urban tree care activity
  • 17. Landscape Establishment of Ornamental Plants Grown in Eastern Redcedar Substrates—2011/2012 {
  • 18. Production and Landscape Establishment   3 Substrate Mixes       80% PB: 20% sand 80% ERC: 20% sand 40% PB: 40% ERC: 20% sand Potted on June 5, 2011 Into the field Oct. 5, 2011 Harvested Sept. 5, 2012 Plants         Dwarf Maiden grass (Miscanthus sinensis ‘Little Kitten’) Blanket flower (Gaillardia x grandiflora) Double pink knockout rose (Rosa ‘Radtkopink’) Holly (Ilex glabra ‘Compacta’) Allee lacebark elm (Ulmus parvifolia ‘Emer II’) Sedum (Sedum telphium ‘Autumn Joy’) Hosta (Hosta ‘Sum and Substance’) Daylily (Hemerocallis ‘Charles Johnston’)
  • 19. pH & EC
  • 20. ERC PB:ERC PB
  • 21. PB PB:ERC ERC
  • 22. ER C PB:ERC PB
  • 23. PB PB:ERC ERC
  • 24. PB PB:ERC ERC
  • 25. PB:ERC PB ERC
  • 26. ERC PB:ERC PB
  • 27. PB:ERC PB ERC
  • 28. ERC PB:ERC PB
  • 29. PB:ERC PB ERC
  • 30. Holly
  • 31. PB ERC PB:ERC
  • 32. Hosta
  • 33. Cyclic Irrigation--2012 {
  • 34. 6x 3x 2x 1x PB PB:ERC ERC
  • 35. Rudbeckia
  • 36. 6x 3x 2x 1x ERC PB:ERC PB
  • 37. Hibiscus
  • 38. In Summary… { We’re just getting started
  • 39. Support for these projects is provided by:
  • 40. www.sustainablesubstrates.com