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Tree and Shrub Gardening for Northern California

Bob Tanem
bob_tanem Photo BOB TANEM has been in the nursery business for more than 40 years and has logged over 20 years of air time as a broadcaster on gardening. ''Bob Tanem in the Garden,'' featured Sunday mornings on KSFO Radio in San Francisco, has twice garnered the Quill & Trowel Award for the best gardening radio program in America.

Don Williamson
don_williamson Photo DON WILLIAMSON, the author or coauthor of more than a dozen popular gardening guides, has a degree in horticultural technology and professional certificates in turf management. He has extensive experience designing and constructing both perennial and annual beds in formal landscape settings.