Asexual propagation Vegetative prop.

1. Asexual propagation Vegetative prop.

2. Asexual propagation • Cuttage • Layerage • Division • Graftage

3. Cuttage • Things to consider: • Rooting medium • vermiculite and perlite or sand or water • Sterile/clean containers • Rooting powders or liquids

5. Cuttage • Types of cuttings • Herbaceous • Softwood • Hardwood • Length 3 - 5” for herbaceous, 6-8” for softwood/hardwood. Generally, the longer a cutting, the better • Need a MINIMUM of 2 nodes

6. Sticking easy-to-root cuttings directly in the ground

7. Cuttage • Factors affecting rooting • Age of stock plant • Nutrients in stock plant • Flowers buds present/absent • Temperature (top of cutting vs. bottom) • Wounding • Application of auxins • Moisture/aeration of medium

10. Cuttage • Factors • Time of year • Woody plants • Deciduous best in fall/winter when dormant • Narrow-leaved evergreens - best in fall/winter • Broadleaved evergreens - best in summer • Herbaceous • take during spring with new growth

11. Cuttage • Types of cuttings • Tip cutting • Leaf-bud cutting • Leaf cutting

28. Layerage • Process of forming roots on a stem that is still attached to a plant • Benefits: Renew an existing plant. Direct energy from “mother” plant • Problems: results in limited numbers of plants. Disease transmitted to new plant

29. Layerage • Types: • Tip-layering. Often done with raspberries and other brambles). Tip of shoot inserted into ground upside down • Simple layering. Done in spring. 6” of tip is exposed. Wired and staked. Used on narrow-leaved evergreens

35. Layerage • Types: • Mound layering (stooling). Used on low-branching shrubs • Air layering. To rejuvenate a “leggy” woody shrub or houseplant. • Girdle stem (cut phloem and cambium) • Wrap in moist sphagnum moss • Wrap in plastic and aluminum foil

37. Air layering • Girdle stem (cut phloem and cambium) • Treat wound with rooting powder • Wrap in moist sphagnum moss • Wrap in plastic • Wrap in aluminum foil