ALL SEMINARS ARE FREE with your ticket. DIG IN and turn your garden dreams into reality!

Click on the map below to view a map of the Conference Center and all the Seminar Rooms.

Christina Pfeiffer

Horticulturist, arborist and co-author, Pacific Northwest Gardening Month-by-Month

Christina is a horticulture consultant, instructor and garden writer with over 30 years’ experience in landscape management and arboriculture. Sustainable and efficient landscape techniques are a special area of interest and expertise. She has written an all-new edition of the popular Pacific Northwest Gardening Month-by-Month: What to Do Each Month to Have a Beautiful Garden All Year, co-authored with Mary Robson and to be released by Cool Spring Press in February, 2017. In addition to her private practice, she is a consulting associate with Urban Forestry Services, Inc. and an active volunteer with local community garden projects. She previously led landscape management efforts for the Holden Arboretum and Washington Park Arboretum. A frequent horticultural speaker, Christina has taught courses in pruning, arboriculture, and landscape management at Edmonds and South Seattle Community Colleges, and at the University of Washington. Christina has been a member of the Washington Park Arboretum Bulletin editorial board since 2002. She holds degrees in horticulture from Michigan State and the University of Washington and is an ISA Certified Arborist.


How to Prune…So You Don’t Have to Prune so Often

Pruning done correctly helps moderate return growth, is healthier for a shrub or hedge, and maintains a natural form. Pruning less often also saves labor and energy and reduces green waste volume. Pruning done incorrectly causes rapid return growth, weakens the shrub, stimulates shrubs to rapid growth, and increases your labor. The solution? Learn the simple steps to proper pruning! You’ll save time, labor and have a beautiful shrub or hedge for your efforts which increases your property values!

Friday, Feb 24 at 4:00 pm / DIY Stage / Book signing to follow

Month-by-Month Gardening in the Pacific Northwest

In gardening, as with many things in life, timing can be everything. Staying in step with the rhythm of the season offers opportunities to maximize our gardening efforts to achieve healthier, lovelier gardens with less effort. Learn practical and sustainable methods to include in your gardening practice with tips from her new book, Pacific Northwest Gardening Month-by-Month from Cool Springs Press.

Sunday, Feb 26 at 4:30 pm / Rainier Room / Book signing to follow