Out in the Weeds With Ecological Services - Halogeton (Halogeton Glomeratus)

• Annual; reproduces by seed

• Leaves are small, blue-green, cylindrical, fleshy, ending with a solitary hair-like spine

• Stems reddish to purple

• Early stages of growth resemble Russian thistle

• Flowers are green and inconspicuous and appear June-September

• Turns reddish-yellow later in the summer

• Taproot can reach depths of 20 inches and secondary roots can spread 18 inches laterally

• Produces two types of seed

• Grows well in arid and semi-arid soils or clays

• Toxic to livestock, especially sheep and cattle

• Prolific seed producer that easily invades disturbed areas

• Makes changes to soil composition that reduces native seed germination rates

• Can quickly re-establish after a fire event

Management Strategies

• Preventing seed production of this annual species in critical. Pulling and tilling can be a very effective control method for this shallow-rooted annual. Mechanical control is easiest when plants are seedlings

• Chemical control is effective while weeds are actively growing. For a list of suggested herbicide active ingredients for Halogeton control, please refer to the 2025 CSU Herbicide Recommendations

Always read, understand, and follow the label when making herbicide applications.

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