Transcript Layering

Layering
Asexual Propagation
• Roots are formed on a stem
• root while still attached to the
parent plant
Asexual Propagation
• the stem or root which is rooted
is called a layer
• the layer is removed from the
plant only after rooting has
taken place
Advantages and
Disadvantages
• relatively simple
• requires more time
• requires a lot of work by hand
• fewer plants can be started
from each parent plant
Advantages and
Disadvantages
• usually very successful
• some plants layer naturally raspberry
Simple Layering
• a branch from the parent plant
is bent to the ground
• covered with soil at one point
• terminal end remains exposed
Air Layering
• Ancient Chinese practiced air
layering
• process eliminates burying
part of the plant in the soil
Air Layering
• instead, a part of the stem is
girdled
• cut all the way around
• the cut is surrounded by moist
sphagnum or peat moss
Air Layering
• Moss is wrapped with plastic to
hold in place
• roots grow from the wound on
the stem
Air Layering
• Plants that propagate well this
way:
• Rubber Tree
• Persian Lime
• Magnolia
Air Layering
• When rooting is complete
• 4-6 weeks
• cut layer BELOW roots and
transplant
• Parent portion will continue to
grow and form new branches
Trench Layering
• parent plant is bent to the
ground and covered.
• Shoots arise from buried buds
and roots form under soil
Stool or Mound Layering
• parent plant is cut back to the
soil level
• entire plant is mounded with
soil
• forms numerous shoots and
roots
Compound Layering
• stem is covered by soil at two
or more points
• remaining portion is left
uncovered
• Stem is girdled at points
Compound Layering
• girdled points are buries with
soil
• roots grow from the girdled
points
• Above ground parts continue to
produce leaves and stems