Heads-Up Newsletter

King County Diagnostic Lab newsletter Heads UP!

Heads Up! was published by the King County Master Gardener Diagnostic Lab to share data collected and compiled on plant problems referred to the Lab. See the list of the back issues here. The Diagnostic Lab ceased publication of this newsletter at the end of 2021, but many of the articles are relevant for the time of year in which they were published.

¡¡Heads Up!! Back Issues


  • Heads UP Fall 2021 V7 No 3: End of Season Contemplations; Record Breaking Weather; Attack of Bay Laurel Psyllids
    Sunburns, Scorches and Scalds; Consider Cover Crops; Iris-A Rainbow of Rhizomes; The Sawfly Exceptions; Useful Web Resources; Nerd’s Corner: Scat, Cat!; Twigga Mortis: Sun damage; Frankensquash
  • Heads UP Mid-Season V7 No 2: Mommy Dearest??; Beneficial Garden Insects; Beneficial Garden Insects; Fruit Tree Woes;Funky Friends; Rascally Root Weevils; Nerd’s Corner; Twigga Mortis: Yucky Yucca; Pop Quiz: Is it a Sign or a Symptom?
  • Heads UP Spring 2021 V7 No1: Welcome Back to Heads UP!; Nitrogen in the Spring Garden; European Chafers; Weather Station; A Systematic Approach to Plant Problem Diagnosis; Pop Quiz: Is it a Sign or a Symptom?


  • Heads UP September-October 2020 V6 No 5: Ready, Set, Harvest; Fall Turf Care; The Birdie Did It; Another Trouble-Making Sawfly; Fall for Fall Planting; Raspberries; Weather Station, Nerd’s Corner (Daphne bholua) and Twigga Mortis
  • Heads UP July-August 2020 V6 No4: Greetings to Our Dearly Missed MG Friends; The bugs of Summer; Houseplants: Today’s Original Container Gardens; Kaolin Clay-A Biological Barrier; Anthracnose: Not Just for Dogwoods; Managing Ivy: The Juveniles vs Adult Way; How to Use a Tree Watering Bag-Properly; Twisted Lilies; Weather Station, Nerd’s Corner and Twigga Mortis
  • Heads UP June 2020 V6 No3: How much fertilizer/mulch; Nutrient Deficiencies-an image map; Raised-bed Veggie Gardening; Bug Watch; Verticillium Wilt — again; Weather Station, Nerd’s Corner; Hogweed vs Parsnip?
  • Heads UP April-May 2020 V6 No2: Hello from a social distance; Flex Your Master Gardener Mental Muscles – a pictorial challenge; Weather Station, Nerd’s Corner, Twigga Mortis and a Giant Hornet Alert
  • Heads UP March 2020 V6 No1: Welcome from Heads UP!; Don’t Plant that Tomato Yet!; The Word from Captain Cleanup; 2019 Down to the Numbers; Asian Giant Hornet; Houdini Fly; Weather Station, Nerd’s Corner and Twigga Mortis


  • Heads UP September-October 2019 V5 No5: Bugs of Summer, Ahh, Fall, The Lazy Gardener, Digging in the Data, Winter Garden Planning, Webs in Trees, Spiders, Lawn Fertilizing, The Scoop on Poop, Weather Station, Nerd’s Corner, Twigga Mortis
  • Heads UP July-August 2019 V5 No4: Rusts: A Final Installment, European Chafer, Digging in the Data, It Might Be Mites, Summer Pruning, Bronze Birch Borer, Rose Stem Girdler, Earwigs, Pine False Webworm, That Wormy Thing, Weather Station, Nerd’s Corner, Twigga Mortis
  • Heads UP June 2019 V5 No3: Stealth, Thy Name is Rabbit, Think Brown Rot, Digging in the Data, Rusts & Their Double Lives, Warm Season Crops, Red Lily Leaf Beetle, Weather Station, Nerd’s Corner, Twigga Mortis
  • Heads UP April-May 2019 V5 No2: Clean Up and Have Patience; Viburnum Leaf Beetle; Digging in the Data; Why Do We Water in Rainy Seattle?; Pacific Coast Pear Rust; Weather Station; Twigga Mortis
  • Heads UP March 2019 V5 No1: And We’re Back!; Ooh, It’s an Oomycete!; Warm Season Vegetables and Cold March Temps; Bunnies, Bucks, and Slime; 2018 Lab Stats, Twigga Mortis, and (new) Weather Station


  • Heads UP September-October 2018 V4 No6: Seasonal Changes, Smoke in Your Stomates, Powdery Mildew, Lace Bugs Times Two, Greatness from Manure, Label Challenges with Roundup, Twigga Mortis, Digging Data
  • Heads UP August 2018 V4 No5: Prunus-Stone Fruit, Water Old Trees, Boxwood Blight, Apples: Maggots, Moths & Scab, Verticillium Wilt, Mites, Twigga Mortis, Digging Data
  • Heads UP July 2018 V4 No4: Cane Borers, Cutworms, Mychorrhizae, Tomato Curly Top, Digging Data, Himalayan Blackberry, Twigga Mortis
  • Heads UP June 2018 V4 No3: Stink Bugs, Rusts: Orange is the New Black, Digging Data, Lily Leaf Beetles, Tracking a Pest, Twigga Mortis
  • Heads UP Apr-May 2018 V4 No2: Aphid Hordes, Soil Tests, Lace Bugs, Digging Data, Daylily Gall Midge, Brown Rot, Brown Marmorated Stink Bug, Twigga Mortis
  • Heads UP March 2018 V4 No1: Welcome Back!, New Plant Problem Form, Gardens Awake, To Mulch or Not to Mulch, 2017 Lab Stats, Patience in Garden Cleanup, Organic Matter Matters, Twigga Mortis


  • Heads UP Sept-Oct 2017 V3 No6: Keep Your Fingers Crossed, Early Leaf Drop, Digging Data, Dahlias, Captain Cleanup, Powdery Mildew Images, Tomato Late Blight, Blossom End Rot, Pear Trellis Rust, Lily Fasciation, Twigga Mortis: Heat Fatigue
  • Heads UP Aug 2017 V3 No5: The Beetles are Coming, Beetle Eradication, Data Digging, What’s That Wormy Thing, Tomatoes, Vegetable Fact Sheets, Twigga Mortis: Burlap
  • Heads UP July 2017 V3 No4: Anthracnos — Beyond Dogwoods, Hemlock Woolly Adelgid, Data Digging for Plant Problems, Can Fruit-Rose Girdler, Rhododendron Plagues, Web Sources Not to Ignore, Twigga Mortis: Squirrel
  • Heads UP June 2017 V3 No3: Why is My Arborvitae Dying?, Spotted Wing Drosophila Fly, Data Digging for Plant Problems, Web Sources Not to Ignore, Leaf Blight
  • Heads UP Apr-May 2017 V3 No2: Spring is Here!, Slug Prevention, Data Digging for Plant Problems, Web Sources Not to Ignore, Matching Images to the Problem
  • Heads UP March 2017 V3 No1: Your Role with the Diagnostics Lab, Bugs around in 2016, Fungus among Us, Cultural problems in 2016


  • Heads Up Sep-Oct 2016 V2 No6: About Bats, Grow the Perfect Rhododendron, Colors of Autumn, Nematodes, Problems in the Garden in Fall
  • Heads Up Aug 2016 V2 No5: White Rust, Behold the Leaf, Verticillium Wilt, Watering as an Art Form, the Parasitoid Wasp and The Art of War, Problems in the Garden in August
  • Heads Up July 2016 V2 No4: Leafminers, Managing Weeds, Woolly Apple Aphids, Bird Netting or Not, Dogwood Anthracnose, Problems in the Garden in July, Viruses and Bacteria, Glysophate – Yes, No, Maybe, Drought and Conifer Mortality
  • Heads Up June 2016 V2 No3: Armillaria Root Disease, Apply Maggot, Scab, Boxwood Problems, Black Spot on Roses, Problems in the Garden in June
  • Heads Up Apr-May 2016 V2 No2: Lace Bug, Brown Rot, Raspberries, Weeds and Soils, Got Slugs?, Problems in the Garden in May
  • Heads Up Mar 2016 V2 No1: From Our Database: Running the Numbers and Key Findings


  • Heads Up Sep-Oct 2015 V1 No5: Drought – Lamentation and Hope in 2015, Leafhoppers, Problems in the Garden in September and October, Preparing for Fall, Water
  • Heads Up Aug 2015 V1 No4: Problems in the Garden in August, Crocosmia, Dahlia Fungal Root Rot, Hydrangea Leaf Scorch, Mountain Ash and Sawfly, Hazel and Eastern Filbert Blight, Grapes and Brown Marmorated Stink Bug or Erineum Mite, Cedar Flagging, Cankers, Conks and Galls
  • Heads Up July 2015 V1 No3: Prunus and Maple Problems in July, Dog Vomit Fungus, Cultural Tomato Problems, Dogwoods and Anthracnose, Apple Scab, Pear Rusts
  • Heads Up June 2015 V1 No2: Problems in the Garden in June include brown rot, shothole and tent caterpillars on Prunus; verticillium wilt, anthracnose and eriophyid mites on maples; leaf gall, powdery mildew and lace bugs on rhodies; scab and aphids on Malus; anthracnose on dogwood; and rusts on Pyrus
  • Heads Up May 2015 V1 No1: Welcome, Problems in the Garden in April, Key Plants and their Problems in May

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