Mackenzie's Willow (Salix prolixa)

Mackenzie's Willow

Salix prolixa

Graceful pendulous branches carry soft catkins in early spring. Deciduous small tree; common name: Mackenzie's willow.

Full sun
2–3/week
Moderate
🌱

Plant Needs

☀️
Sunlight Full sun to partial shade; thrives in open, exposed sites and tolerates coastal wind conditions
💧
Watering Keep soil consistently moist; tolerant of periodic flooding and seasonal waterlogging
🌡️
Temperature Extremely cold-hardy, withstanding temperatures as low as -40°C; avoid prolonged extreme heat above 35°C
🔍

Characteristics

  • Leaf: Narrow lanceolate leaves, 5–12 cm long, glabrous above, silvery pubescent beneath
  • Flower: Dioecious catkins; male catkins yellow, female catkins greenish, emerging prior to foliage
  • Stem/Bark: Slender, flexible branches; young stems reddish-brown, mature bark grayish-brown with shallow fissures
🛠️

Care Guide

Watering

Maintain consistently moist soil; increase frequency during prolonged dry spells

Fertilization

Diluted balanced liquid feed once monthly. Use low-nitrogen feed to promote healthy root and stem development

Composted banana peel tea:Compost banana peels for 2–3 weeks, steep in water for 24 hours, dilute 1:20 for root drench; avoid raw peels to prevent pest infestations and odor
Pruning
  • Prune dead or damaged branches in late winter to encourage vigorous new growth
  • Thin crowded inner branches to improve airflow and reduce disease risk
  • Remove root suckers to maintain desired shape and prevent overcrowding
  • Trim back overly long branches in early spring to control tree size and form
⚠️

Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; contains salicin leading to vomiting, diarrhea, abdominal pain, and lethargy

Humans: Contains salicin; large ingestion may cause nausea, vomiting, and tinnitus similar to aspirin overdose

📖

Garden Uses & Culture

Culture: Symbolizes flexibility and resilience in some Western North American indigenous cultures

Usage: Erosion control along stream banks; ornamental garden tree for spring catkin display