Marc Teffeau has been contributing Tidewater Gardening to the Tidewater Times since 1989. He is a Maryland Certified Professional Horticulturalist with over 30 year’s experience in horticulture. He retired as Director of Research and Regulatory Affairs with the American Nursery and Landscape Association (ANLA) in Washington, D.C. Prior to going with ANLA he retired from a career with the University of Maryland Cooperative Extension as Professor and Regional Extension Specialist for Commercial Horticulture at the Wye Research and Education Center and as county and area Extension Horticulture Agent in Talbot County. Marc has B.S., M.S. and PhD from the University of Maryland – College Park.
- November 2005 – November Cleanup
- December 2005 – Confusion About Christmas Cactus
- January 2006 – New Annuals for 2006
- February 2006 – Winter Berry Color
- March 2006 – Getting Ready for Hot & Spicy Summer Color
- April 2006 – Radiant Redbuds
- May 2006 – Lawn Alternatives
- June 2006 – Making It in the Shade
- July 2006 – Butterfly Bush
- August 2006 – Consider Species Tulips
- September 2006 – September Lawn and Landscape Tips
- October 2006 – Ground Covers and Kale
- November 2006 – Winter Hardiness
- December 2006 – Painted Poinsettias?
- January 2007 – Bring in the New Year – Think Spring!
- February 2007 – Catmints and Dogwoods
- March 2007 – Spring is Around the Corner
- April 2007 – April Activities
- May 2007 – Moving Into May
- June 2007 – June Gardening Jobs
- July 2007 – An Organic Control for Mildew Diseases
- August 2007 – August Antics
- September 2007 – Preparing for Fall – Drought Stress
- October 2007 – Fall Symbols and Punkin’ Chunkin’
- November 2007 – Preparing for Winter
- December 2007 – December Gardening Duties
- January 2008 – “Bewitching” Flowering Trees in Winter
- February 2008 – Waiting for Spring
- March 2008 – March Madness
- April 2008 – What’s New for April?
- May 2008 – Happy Mother’s Day
- June 2008 – Early Summer Gardening Chores
- July 2008 – Colors in July
- August 2008 – Summer At Its Peak
- September 2008 – September Setups for Fall
- October 2008 – October – Dry Season and New Perennials
- November 2008 – Sexing Up Your Holly
- December 2008 – Moving Indoors
- January 2009 – 2009 AAS Winners
- February 2009 – Getting the Jump on Spring
- March 2009 – Orangy-red Coneflowers?
- April 2009 – April Appearances
- May 2009 – Vegging Out
- June 2009 – Small Shrubs for Small Lots
- July 2009 – Easy Foliage Color in the Flower Bed
- August 2009 – Summer Doldrums
- September 2009 – Moving Plants Back Indoors
- October 2009 – The Chill is in the Air
- November 2009 – November Chores
- December 2009 – Miniature Christmas Trees
- January 2010 – Interior Houseplant Care
- February 2010 – Monetizing the Value of Your Landscape
- March 2010 – Hurry Up Spring!!
- April 2010 – Winter Storm Cleanup
- May 2010 – Spring Moves Forward
- June 2010 – Early Summer Gardening Chores
- July 2010 – July Gardening Activities
- August 2010 – August is Maintenance Month
- September 2010 – Hot Enough For Ya?
- October 2010 – October is Peony Time
- November 2010 – Getting the Garden Ready for Winter
- December 2010 – Providing Winter Color
- January 2011 – Woody Plant Winners for 2011
- February 2011 – Another Snowmageddon?
- March 2011 – Rushing the Season
- April 2011 – Proverbial Showers
- May 2011 – Organic vs. Synthetic Fertilizers
- June 2011 – June Brides and Flowers
- July 2011 – Its Not Too Late to Vegetate!
- August 2011 – August Serenade
- September 2011 – September Turf Tips
- October 2011 – October Opportunities
- November 2011 – November Berry Color
- December 2011 – Poinsettia Pointers and Alternative Holiday Plants
- January 2012 – Thoughts on Seeds
- February 2012 – Boxwood Blight
- March 2012 – Whacky Winter Weather
- April 2012 – April Activities
- May 2012 – Reblooming Shrubs
- June 2012 – Early Summer Garden Chores
- July 2012 – Gardening Myth Busters
- August 2012 – Summer Doldrums
- September 2012 – Time For Planting!!
- October 2012 – Planting Deciduous Trees and Shrubs
- November 2012 – Autumn Leaves
- December 2012 – Holiday Herbs and Plants
- January 2013 – The January Landscape
- February 2013 – Novel Ways to Garden
- March 2013 – Spring Has Arrived!
- April 2013 – Spring Showers and Flowers
- May 2013 – Eating Your Landscape
- June 2013 – Jumping Into Summer
- July 2013 – Pests and Problems in July
- August 2013 – August Gardening Angst
- September 2013 – Swinging Into Fall
- October 2013 – Fall is for Planning and Planting
- November 2013 – Thinking About the Outside and the Inside
- December 2013 – Christmas Greens
- January 2014 – Care of Holiday Gift Plants
- February 2014 – Time to “App” Your Garden
- March 2014 – March is the Cruelest Month
- April 2014 – April Apprehension
- May 2014 – Transitioning Into Spring
- June 2014 – Garden & Landscape Care in June
- July 2014 – July Jottings
- August 2014 – Summer Doldrums
- September 2014 – Transitioning from Summer to Fall
- October 2014 – Fall Fun
- November 2014 – Shorter Days and Nippy Temperatures
- December 2014 – Presents and Christmas Greenery
- January 2015 – Gardening in 2015
- February 2015 – February – The Shortest Month
- March 2015 – Planting “Superfoods” in the Vegetable Garden
- April 2015 – Spring Has Arrived! Exercise Time!
- May 2015 – Spring in the Garden
- June 2015 – Transitioning to Summer Activities
- July 2015 – Vacation Time?
- August 2015 – Planting for Pollinators
- September 2015 – The Other Spring-Flowering Bulbs
- October 2015 – Fall Fun – October Gardening Activities
- November 2015 – Transitioning Time
- December 2015 – Amaryllis, Cyclamens & Kalanchoes
- January 2016 – Looking Forward to 2016
- February 2016 – As the Worm Turns
- March 2016 – Anticipating Spring
- April 2016 – April Arrives with Bulb Flowers and Bees
- May 2016 – May Movements in the Landscape
- June 2016 – Moving Into Summer
- July 2016 – July ~ the Full Buck Moon
- August 2016 – Harvesting and Preserving Herbs
- September 2016 – Swinging Into Fall
- October 2016 – Frost on the Pumpkin?
- November 2016 – November Notes
- December 2016 – Deck the Halls!
- January 2017 – The Winter Wait
- February 2017 – Encouraging Butterflies
- March 2017 – March Madness
- April 2017 – Don’t Rush the Season
- May 2017 – Dear Deer
- June 2017 – June Bugs and Other Things
- July 2017 – July: Thunderstorm Time
- August 2017 – Another Sweltering August
- September 2017 – Time to Lime
- October 2017 – Projects and Plantings
- November 2017 – Autumn Leaves are Falling
- December 2017 – Christmas Cacti – Not from the Desert
- January 2018 – Keeping Green Inside
- February 2018 – Preparing for Spring
- March 2018 – March is a Teaser
- April 2018 – April is the Cruelest Month
- May 2018 – The Merry, Merry Month of May
- June 2018 – June is For the Birds
- July 2018 – Chores in the Garden
- August 2018 – August Web Wars and Aspirin for Your Tomatoes
- September 2018 – September Slowdown
- October 2018 – Fall Has Arrived!
- November 2018 – Decreasing Sunlight
- December 2018 – Maple as a Houseplant and Christmas Greenery
- January 2019 – January ~ Looking Back and Forward
- February 2019 – Anticipating Spring
- March 2019 – Workouts Needed for Gardening Couch Potatoes
- April 2019 – Welcoming Spring with Flowers
- May 2019 – Mellow May
- June 2019 – Gardening in June
- July 2019 – Garden Pests and Carolina All Spice
- August 2019 – August: Time to Water
- September 2019 – Prepping for Fall
- October 2019 – Eye-Catching Fall Colors
- November 2019 – Still Dry in November
- December 2020 – Maple as a Houseplant and Holiday Greenery
- January 2020 – Dealing with January
- February 2020 – Reading Seed Catalogs
- March 2020 – Anticipating Spring
- April 2020 – An Early Spring
- May 2020 – Proper Pruning
- June 2020 – Transitioning to Warm-Season Vegetables
- July 2020 – July Pests, Problems and Practices
- August 2020 – Steamy August “Stay-cation” Activities
- September 2020 – Bulb Planting Time
- October 2020 – October Glory
- November 2020 – November Nuggets
- December 2020 – Holiday Gift Plants
- January 2021 – Inside Houseplant Care for 2021
- February 2021 – Shallots and Peppers!
- March 2021 – March Mayhem
- April 2021 – It’s Finally Spring!
- May 2021 – Monarda in May
- June 2021 – June Transitions
- July 2021 – Thunder Moon
- August 2021 – Gardens Don’t Take Vacations
- September 2021 – Bulbs and Perennials
- October 2021 – A Change of Season
- November 2021 – Out of Your Gourd
- December 2021 – Holiday Herbs and Plants
- January 2022 – New Year Activities
- February 2022 – Yellow Petunias for 2022
- March 2022 – It’s Time to Move It! Move It!
- April 2022 – Don’t Rush Warm-Season Plantings
- May 2022 – May Flowers . . .
- June 2022 – Phloxing to Your Garden
- July 2022 – Fall Vegetables and Sunny Sunflowers
- August 2022 – End of Fruit Month
- September 2022 – Turf Tips and September Gardening
- October 2022 – Fall Clean-Up and Planting
- November 2022 – Moving Into Winter
- December 2022 – End of Year Clean-Up
- January 2023 – Try New and Old Plants in 2023
- February 2023 – February Activities
- March 2023 – March: Don’t Get Too Anxious
- April 2023 – April Projects
- May 2023 – Garden Musings and the Merry Month of May
- June 2023 – Moving to Summer Gardening Activities