âś… Do:
Place in sunny spots for bold color and stronger growth.
Use in landscaping, borders, or as focal plants.
Combine with succulents, grasses, or yuccas for a modern garden look.
Divide clumps every 3–4 years if overcrowded.
❌ Don’t:
Don’t let soil stay waterlogged — roots rot easily.
Don’t overfertilize — encourages weak, floppy growth.
Don’t plant too close to walkways — leaves can grow wide and arching.
Don’t neglect pruning — old leaves will make it look messy.
New Zealand Flax (Phormium colensoi)
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Plant Details & Care
Growth Category
Moderate
Temperature Range
8 – 28°C (handles Addis highland climate, not frost hardy below 5°C) °C
Light Requirement
Full sun to partial shade (full sun gives stronger colors; shade keeps leaves softer).
Agro Ecology
Sub-humid to semi-arid
Watering Frequency
Twice a week; drought-tolerant once established.
Twice a week; drought-tolerant once established.
Region
Best in Ethiopian highlands as an ornamental border, accent plant, or container specimen.
Behavior
Forms clumps of long, sword-like, arching leaves (softer and more drooping than Phormium tenax).
Leaves can be green, bronze, or variegated depending on variety.
Produces tall flower spikes with yellow-green flowers that attract birds.
Grows 1–2 m tall, smaller than P. tenax (so easier to manage in gardens).
Leaves can be green, bronze, or variegated depending on variety.
Produces tall flower spikes with yellow-green flowers that attract birds.
Grows 1–2 m tall, smaller than P. tenax (so easier to manage in gardens).
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Treatment
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Treatment