Layering Asexual Propagation Roots are formed on a

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