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I will be air-layering a cork oak this Spring (actually two of them). Oaks do not root easily, especially when compared to many other deciduous bonsai (like maples or elms). You will need to use a strong rooting hormone; Indole-3-butyric Acid 1.6% (or IBA 1.6) . Most rooting hormones available in Garden Centers are IBA .1% so you will need to order direct from a nursery supply company (or find a friendly local nursery).

Oaks can be air-layered in the sun, but they will root more quickly if placed in partial shade.

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31-Dec-2006	#4
kragmire Stalker of black pines Join Date: Nov-2006 Location: Orange County, CA Country: USA USDA Zone: 10a AHS Heat Zone: ? Posts: 48	I will be air-layering a cork oak this Spring (actually two of them). Oaks do not root easily, especially when compared to many other deciduous bonsai (like maples or elms). You will need to use a strong rooting hormone; Indole-3-butyric Acid 1.6% (or IBA 1.6) . Most rooting hormones available in Garden Centers are IBA .1% so you will need to order direct from a nursery supply company (or find a friendly local nursery). Oaks can be air-layered in the sun, but they will root more quickly if placed in partial shade. www.bonsainut.com