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John Fulton

John Fulton
Former County Extension Director

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In The Backyard

Horticulture columns and tips done on a timely basis
Common Teasel

Teasel - Invasive Plant

Posted by John Fulton -

Another invasive plant, teasel, is easily noticed along highway and railroad right-of-way. The plant looks like a thistle, and has gone gangbusters since the spray programs have been curtailed due to budget restrictions. The plant behaves like a biennial in that it has a small rosette stage the first year, then bolts to the tall, flowering plant the second year. This life cycle is similar to another invasive plant: poison hemlock. The best controls listed are triclopyr and glyphosate (Roundup). The trichlopyr is a broadleaf only weed killer, and is often used to help with control of violets. The glyphosate will take out both broadleaves and grasses, so is most effectively used by wiping on a few isolated plants.

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