By Margaret Bayne, OSU Extension Service Staff-retired, OSU Master Gardener

Are we going to see another “Heat Dome” this year? 
Hope not!…but be prepared!  Check out the resources below.

Brown leaves on a plant due to injury caused by a heatwave.
2021 Heatwave Damage – Kym Pokorny, Oregon State University

***Great Publication/book to add to your library: Abiotic Disorders of Landscape Plants; A Diagnostic Guide, Publication #3420, (University of California ANR) ISBN 1-879906-58-9.  Learn the difference between sunburn injury, sunscald injury, thermal/high temperature injury and high light injury.

Brown crinkled leaves of a blackberry plant and discolored, withered blackberries, all damage due to heatwave.
2021 Heatwave damage on blackberries
Bernadine Strik, Oregon State University

What Can We Learn from the ‘Pacific Northwest Heat Dome’ of 2021? (Nicole Bell, WSU) https://bit.ly/3MklELi

June 2021 heat impacts on trees explained. (Glen Ahrens, OSU) https://bit.ly/3sFx9oJ

What is a ‘heat dome’. (NOAA) https://bit.ly/3sFIhlx

How to care for heat-damaged plants. (Heather Stoven, OSU via Kym Pokorny, OSU) https://bit.ly/3PrUzrJ

Tips for gardening in extreme heat. (Erica Chernoh, OSU via Kym Pokorny, OSU) https://bit.ly/3Lh4TPP

Heat wave in the garden: how to identify and prevent heat stress in plants. (Nicole Sanchez, OSU) https://bit.ly/38yerZx

Environmental injury: Sunscald and Sunburn on Trees https://bit.ly/3wiAtbz

Rhododendron -Sunburn. PNW Disease Handbook https://bit.ly/3yEdwkX

Rhododendron -Leaf Scorch. PNW Disease Handbook https://bit.ly/38C6yCa

Brown leaf scorch on leaves of Rhododendron plant.
Leaf scorch on Rhododendron
Jay Pscheidt, Oregon State University

The Myth of Hot-Weather Watering “Watering plants on a hot sunny day will scorch their leaves”, (Dr. Linda Chalker-Scott, WSU) https://bit.ly/3wjNp0V

And/or search online:

1. Add “site:edu” to the search word or phrase, but omit the quotes.

2. If you search for sunburn, try “sunburn +plants site:edu” (omit the quote marks).  (Doing so will help limit the number of references to sunburned people!)