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Populus fremontii
Fremont Cottonwood
Populus fremontii
Populus fremontii, commonly known as the Fremont Cottonwood, is a deciduous tree native to the Southwestern United States and parts of Mexico. It is characterized by its broad, rounded crown and often grows near water sources like rivers and streams. The tree's leaves are heart-shaped and turn golden in the fall. It plays a vital role in riparian ecosystems, providing shade, stabilizing streambanks, and offering habitat for various wildlife.
CategoryDetails
Plant TypePerennial plant
Estimated Plant Lifespan75 years lifespan
ToxicityToxic to: Horses
Sun Requirements6+ hours direct sunlight (Full Sun)
Pollination

Method: Wind

Notes: Fremont Cottonwoods are wind-pollinated. They produce large quantities of pollen that are dispersed by the wind.

Watering Requirements

Method: Deep watering

Frequency: Regularly, especially during dry periods

Notes: Young trees need consistent moisture. Mature trees are drought-tolerant, but benefit from occasional deep watering, especially during dry spells.

Humidity Requirements

Level: Moderate

Maintenance: No special methods needed in most environments.

Temperature Range

Min: -15°C

Max: 40°C

Alternative NamesAlamo Cottonwood, Desert Cottonwood, Populus arizonica, Fremont's Cottonwood, Populus × canadensis fremontii, Populus deltoides fremontii
Salix gooddingii
Goodding's willow
Salix gooddingii
Goodding's Willow shares similar water requirements and habitat preferences, thriving in riparian environments alongside Fremont Cottonwood. Their combined presence provides diverse ecological benefits.
Alnus rhombifolia
white alder
Alnus rhombifolia
White Alder can grow in similar riparian environments. They can coexist, adding to the diversity and stability of the ecosystem.
Acer negundo
box elder
Acer negundo

Boxelder can aggressively colonize similar habitats, potentially outcompeting Fremont Cottonwood for resources like sunlight, water, and nutrients.

Tamarix ramosissima
saltcedar
Tamarix ramosissima

Although not ideal, if a location is heavily infested with Saltcedar, it is possible that it will compete with the Fremont Cottonwood for water and sunlight

Cottonwood Leaf Beetles

These beetles feed on the leaves of the cottonwood, causing defoliation. Signs include chewed leaves and the presence of beetles on the foliage.

Aphids

Aphids suck sap from the leaves and stems, causing the leaves to curl and distort. They also excrete honeydew, which can lead to sooty mold.

Steps:

    • Take hardwood cuttings in late fall or winter.
    • Plant the cuttings in moist soil or a soilless mix.
    • Keep the cuttings consistently moist.
    • Roots should develop within a few months.
    • Collect seeds from mature cottonwood trees.
    • Sow seeds in a well-draining seed-starting mix.
    • Keep the soil moist and provide adequate light.
    • Transplant seedlings when they are large enough to handle.

Neem Oil

Effective for controlling aphids and other insect pests.

Insecticidal Soap

Controls aphids and other soft-bodied insects.

Compost

Enhances soil quality and provides nutrients.