1. Layering

2. Definition
A form of rooting cuttings in which adventitious roots are initiated on a stem while it is still attached to the plant
Occurs naturally
The rooted stem is called the layer

3. History Ancient nursery technique
Mound and trench layering used to produce hard-to-root fruit varieties (1900’s)
Largely replaced by modern cutting propagation

4. Advantages Disadvantages Good for difficult to root species
Don’t need fancy facilities
Avoid the stress that cuttings experience
Disadvantages
Low number of plants
Labor intensive (expensive)
Takes some time

5. Physiology
Accumulation of photosynthates & hormones in the rooting area
girdling
incision
bending
Exclusion of light
blanching and etiolation
Apparent rejuvenation
Start in spring with dormant hardwood

6. Techniques Simple layering Tip layering Serpentine (compound)
Mound layering or stooling
Trench layering
Air layering
Runners and plantlets

7. Simple layering

8. Tip layering

16. Serpentine layering

17. Mound layering

18. Mound layering in a container

19. Trench layering

20. Air layering

21. Runners and plantlets

22. Plant Patents! Plant patents To search for plant patents
To search for plant patents

23. Lab today Do layering methods (3) per the lab handout
If hardwood cuttings have foliage, move to the mist in the West greenhouse
Observe leaf cuttings (and everything else)
Toss dead stuff - can try more if you like
Note – Roots? Where? How many? How long? What color?