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PROPAGATION BY DIVISION Presented by Sheryl Williams  Spring 2002
What is Division? <ul><li>Separation of the crown of a plant into smaller pieces for propagation or to rejuvenate a plant ...
Benefits of Division <ul><li>Rejuvenate mature plants </li></ul><ul><li>Acquire several small portions complete with </li>...
What Cannot be divided? <ul><li>Species that do not form a crown or have underground stems. </li></ul><ul><li>Candytuft,  ...
When to Divide <ul><li>Rule is: </li></ul><ul><ul><li>If it blooms in Spring, divide in Fall </li></ul></ul><ul><ul><li>If...
How do we know if a plant needs to be divided? <ul><li>Has the plant outgrown it’s allotted space? </li></ul><ul><li>Has t...
Divide when a plant has outgrown it’s spot
Divide when a plant flops open in the middle <ul><li>Clara Curtis Chrysanthe-mum </li></ul>
Why does this happen? <ul><li>Perennials are non woody plants </li></ul><ul><li>Majority make their new growth from the ba...
How plants grow – example Alfalfa crown <ul><li>The crown is the over wintering stem tissue </li></ul><ul><li>The crown an...
Alfalfa crown 2 <ul><li>Branch rhizome is the structure from which new growth will initiate in the spring  </li></ul><ul><...
Alfalfa plant diagram
Lab 1 – Examine the samples <ul><li>What kind of structure do you have? </li></ul><ul><ul><li>Spreading </li></ul></ul><ul...
How a plant dies out in the middle
Prepare to Divide <ul><li>Prepare beds for the new plants ahead of time, adding organic matter and fertilizer </li></ul><u...
Dig up the Plant <ul><li>Carefully pry up the plant, inserting the fork at an angle several inches outside  </li></ul><ul>...
Set the plant down and slice through the crown <ul><li>Use a spade if the plant is woody. </li></ul><ul><li>Divide the clu...
How to Divide <ul><li>Cut away the woody or hard, unproductive center of the old plant, using shoots only from the outer p...
Prune Back <ul><li>Any dead or damaged foliage </li></ul><ul><li>Trim some of the top if the top is too lush for the roots...
Don’t let the roots dry out <ul><li>Heel the cuttings in </li></ul><ul><li>Either moist soil mix or peat </li></ul><ul><li...
How to Divide small plants <ul><li>Small plants can be pulled apart </li></ul>
Back to Back Garden Forks <ul><li>Great for large fibrous-rooted perennials.  </li></ul><ul><li>Place garden forks back to...
Rhizomes can be cut apart with a knife
Autumn Joy Sedum <ul><li>Cut in half </li></ul>
 
Techniques for Dividing Perennials <ul><li>List courtesy of Fine Gardening Magazine </li></ul><ul><ul><li>http://Taunton.c...
How to Plant your new divisions <ul><li>Cover plants with sun protection </li></ul><ul><ul><li>Burlap </li></ul></ul><ul><...
Where to get more information <ul><li>American Horticultural Society, Plant Propagation, Alan Toogood Editor in Chief </li...
Helpful websites <ul><li>http://ag.arizona.edu/pubs/garden/mg/botany/plantparts.html  plant botany for lay people </li></u...
 
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Propagation by Division

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Propagation by Division

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Propagation by Division

  1. 1. PROPAGATION BY DIVISION Presented by Sheryl Williams Spring 2002
  2. 2. What is Division? <ul><li>Separation of the crown of a plant into smaller pieces for propagation or to rejuvenate a plant </li></ul><ul><li>Each piece must have at least one bud (or eye) for new growth and </li></ul><ul><li>Some roots </li></ul>
  3. 3. Benefits of Division <ul><li>Rejuvenate mature plants </li></ul><ul><li>Acquire several small portions complete with </li></ul><ul><ul><li>Roots </li></ul></ul><ul><ul><li>Shoots </li></ul></ul><ul><li>Can immediately be planted as new plants </li></ul>
  4. 4. What Cannot be divided? <ul><li>Species that do not form a crown or have underground stems. </li></ul><ul><li>Candytuft, Iberis , grows entirely from a single stem, like a little tree. </li></ul><ul><li>Lavender and rosemary are the same. </li></ul>
  5. 5. When to Divide <ul><li>Rule is: </li></ul><ul><ul><li>If it blooms in Spring, divide in Fall </li></ul></ul><ul><ul><li>If it blooms in Fall, divide in Spring </li></ul></ul><ul><li>When the plants are not in active growth </li></ul><ul><li>If flower in spring, wait until they have bloomed </li></ul><ul><li>Avoid extreme heat or cold </li></ul>
  6. 6. How do we know if a plant needs to be divided? <ul><li>Has the plant outgrown it’s allotted space? </li></ul><ul><li>Has the number of flowers decreased over the last few years? </li></ul><ul><li>Does the plant flop open? </li></ul><ul><li>Does the plant have an open center? </li></ul>
  7. 7. Divide when a plant has outgrown it’s spot
  8. 8. Divide when a plant flops open in the middle <ul><li>Clara Curtis Chrysanthe-mum </li></ul>
  9. 9. Why does this happen? <ul><li>Perennials are non woody plants </li></ul><ul><li>Majority make their new growth from the base, or crown </li></ul><ul><li>Majority roots or rhizomes spread </li></ul><ul><li>Plants form clumps </li></ul>
  10. 10. How plants grow – example Alfalfa crown <ul><li>The crown is the over wintering stem tissue </li></ul><ul><li>The crown and root tissue store carbohydrates (food) produced through photosynthesis </li></ul><ul><li>Crown buds produce the vegetative regrowth following harvest or </li></ul><ul><li>Produce branch rhizomes. </li></ul>
  11. 11. Alfalfa crown 2 <ul><li>Branch rhizome is the structure from which new growth will initiate in the spring </li></ul><ul><li>The Branch rhizomes grow outward and upward increasing the circumference of the plant </li></ul><ul><li>The crown increases in size each year. </li></ul>
  12. 12. Alfalfa plant diagram
  13. 13. Lab 1 – Examine the samples <ul><li>What kind of structure do you have? </li></ul><ul><ul><li>Spreading </li></ul></ul><ul><ul><li>Clumping </li></ul></ul><ul><ul><li>Fleshy </li></ul></ul><ul><ul><li>Rhizome </li></ul></ul>
  14. 14. How a plant dies out in the middle
  15. 15. Prepare to Divide <ul><li>Prepare beds for the new plants ahead of time, adding organic matter and fertilizer </li></ul><ul><li>If you can’t replant immediately, heel in your divisions while you are preparing the beds </li></ul><ul><li>Replant as soon as possible </li></ul>
  16. 16. Dig up the Plant <ul><li>Carefully pry up the plant, inserting the fork at an angle several inches outside </li></ul><ul><li>Work all around the plant, lifting gently until the clump comes free from the soil. </li></ul>
  17. 17. Set the plant down and slice through the crown <ul><li>Use a spade if the plant is woody. </li></ul><ul><li>Divide the clump into as many smaller pieces as desired </li></ul><ul><li>Be sure each piece has vigorous shoots </li></ul>
  18. 18. How to Divide <ul><li>Cut away the woody or hard, unproductive center of the old plant, using shoots only from the outer part of the clump </li></ul><ul><li>Shake or wash them free of soil </li></ul><ul><ul><li>You can see the natural lines of division </li></ul></ul><ul><ul><li>Avoid damaging the roots, buds or shoots </li></ul></ul>
  19. 19. Prune Back <ul><li>Any dead or damaged foliage </li></ul><ul><li>Trim some of the top if the top is too lush for the roots </li></ul><ul><li>Plant divisions at the same depth as the original plant </li></ul>
  20. 20. Don’t let the roots dry out <ul><li>Heel the cuttings in </li></ul><ul><li>Either moist soil mix or peat </li></ul><ul><li>Plastic storage crates are great </li></ul>
  21. 21. How to Divide small plants <ul><li>Small plants can be pulled apart </li></ul>
  22. 22. Back to Back Garden Forks <ul><li>Great for large fibrous-rooted perennials. </li></ul><ul><li>Place garden forks back to back and lever the forks back and forth to loosen the roots. </li></ul>
  23. 23. Rhizomes can be cut apart with a knife
  24. 24. Autumn Joy Sedum <ul><li>Cut in half </li></ul>
  25. 26. Techniques for Dividing Perennials <ul><li>List courtesy of Fine Gardening Magazine </li></ul><ul><ul><li>http://Taunton.com/finegardening/pages/g00022.asp </li></ul></ul><ul><li>Chart of which tool to use to divide which perennial </li></ul><ul><li>Also includes some perennials to leave alone </li></ul>
  26. 27. How to Plant your new divisions <ul><li>Cover plants with sun protection </li></ul><ul><ul><li>Burlap </li></ul></ul><ul><ul><li>Boxes </li></ul></ul><ul><ul><li>Paper pots </li></ul></ul><ul><li>Apply mulch </li></ul>
  27. 28. Where to get more information <ul><li>American Horticultural Society, Plant Propagation, Alan Toogood Editor in Chief </li></ul><ul><li>The Well Tended Perennial Garden; Planting and Pruning Techniques by Tracy DiSabato-Aust </li></ul>
  28. 29. Helpful websites <ul><li>http://ag.arizona.edu/pubs/garden/mg/botany/plantparts.html plant botany for lay people </li></ul><ul><li>http://www.savvygardener.com/Features/when_to_didvide_perennials.html (yes it is spelled incorrectly) chart of when to divide plants </li></ul><ul><li>http://behnke.com/Library/perenniallibrary.htmlDifferent methods of propagating plants </li></ul>

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