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Scotch Thistle

Scotch thistle was introduced to the United States in the 1800s as an ornamental plant from the Mediterranean region. It is a noxious weed in Idaho, Oregon, and Washington. Scotch thistle can form dense, virtually impenetrable ...

Sep 2003 | OSU Extension Catalog

Russian Thistle: Management in a Wheat-Fallow Crop Rotation

Reviews Russian thistle biology as it relates to management, including seed dormancy and longevity in soil, seed distribution, seed germination and emergence, plant growth after establishment, crop competition, and resistance to ...

Aug 2019 | OSU Extension Catalog

Perennial Weed Biology and Management

Explains how simple and creeping perennial weeds reproduce and spread. Covers weed seedbanks, seed dormancy in soil, and factors that influence seed germination. Describes the typical root structure of perennial weeds and the various...

Mar 2001 | OSU Extension Catalog

April garden calendar

Garden planning, maintenance and pest management tips for the month of April.

May 2018 | Article

February Garden Calendar

Information about garden planning, maintenance and clean up, pest monitoring and management, houseplants, and indoor gardening for the month of February.

May 2018 | Article

July Garden Calendar

Information about garden planning, maintenance and clean up, pest monitoring and management, houseplants, and indoor gardening for the month of July.

May 2018 | Article

March garden calendar

Information about garden planning, maintenance, pest management and indoor gardening for March.

May 2018 | Article

October Garden Calendar

Information about garden planning, maintenance and clean up, pest monitoring and management, houseplants, and indoor gardening for the month of October.

May 2018 | Article

Look out for prickly Paterson's Curse in wildflower seed mixes

Be on the lookout for prickly Paterson's Curse in wildflower seed mixes.

Nov 19, 2007 | News Story

May Garden Calendar

Information about garden planning, maintenance and clean up, pest monitoring and management, houseplants, and indoor gardening for the month of May.

May 2018 | Article