Arizona thistle (Cirsium arizonicum)

Arizona thistle

Also known as: Monarch thistle

Arizona thistle is found in higher elevations (900 to 3600 m above sea level) in the southwestern United States and Mexico. The entire Cirsium genus, including arizona thistle, is listed as a noxious weed in certain U.S. states, like Arkansas and Iowa.

Scientific classification

Species

Arizona thistle (Cirsium arizonicum)

Asters bellflowers fanflowers and allies

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Perennial, Biennial

Lifespan

Herb

Plant Type

Spring, Summer, Fall

Bloom Time

1.2 m to 1.5 m

Plant Height

2.5 cm to 5 cm

Flower Size

Purple, Red

Flower Color

Deciduous

Leaf type

Images of Arizona thistle

Distribution of Arizona thistle

Distribution Map

Arizona thistle is native to the North American region, specifically in the southwestern zone. The plant thrives in its local habitat but has not established significant ranges outside of its indigenous territory. Details on its introduction to other regions are not prevalent, implying a distribution confined chiefly to its original geographic bounds.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Mountains

Hemisphere Trend Curve

Northern

Sorthern

Care Guide for Arizona thistle

Every week

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Water: Arizona thistle thrives in arid environments, exhibiting a preference for drier conditions and tolerating occasional droughts. It requires moderate watering once a week and flourishes outdoors, benefiting from seasonal rain patterns aligned with its growth cycles.

Fertilize: For arizona thistle, use a balanced, slow-release fertilizer monthly during the growing season. Limit applications from spring to late summer, reducing frequency in fall. Over-fertilization can be harmful, so follow label instructions precisely. Adjust care seasonally to align with arizona thistle's growth cycle for optimal health.

Pruning: Arizona thistle, a perennial with spiny foliage and vibrant blooms, thrives with early spring pruning. Trim dead stems and spent flowers to encourage growth and prevent overcrowding. Regular pruning enhances vigor, reduces pests and diseases, and promotes a healthy display. Use clean tools to avoid infections.

Propagation: Arizona thistle propagates well through sowing in well-draining soil at a shallow depth for light-assisted germination. Start in seedling trays with consistent moisture, then transplant carefully. Regular watering and weed control are essential for healthy growth.

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Learn More About Arizona thistle

Sunlight Requirements

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