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Guía de plantas

New Zealand Flax.

Phormium tenax

Pronunciación FOR-mee-um TEN-aks

También se conoce como Lowland flax, New Zealand Flax, New Zealand hemp, New Zealand-flax, New Zealand-hemp, Swamp flax, harakeke

Phormium tenax
Foto de Arnim Littek (CC BY) via gbif

New Zealand flax is a striking architectural plant known for its long, sword like leaves that add a bold vertical element to any garden. It thrives in a variety of conditions and is quite popular for its tough, low maintenance nature. You will love how it creates a dramatic focal point in your landscape.

De un vistazo

Care level
Easy
Plant type
Evergreen perennial
Light
Full sun to partial shade
Indoor light
bright-indirect
Water
Every 7 to 14 days
Mature size
300 cm tall
Growth rate
medium
Hardiness
USDA 8 to 11
Bloom time
Late spring to summer

Cuidados

Plant in well draining soil and ensure it gets plenty of light to maintain its vibrant color. Watch for signs of root rot if the soil stays soggy for too long. Trim away dead or damaged leaves at the base to keep the plant looking tidy.

Watering
Allow the top few centimeters of soil to dry out between waterings.
Feeding
Apply a balanced liquid fertilizer during the active growing season.
Pruning
Remove old or damaged foliage once a year to encourage fresh growth.
Repotting
Repot when the plant becomes root bound or outgrows its container.
Soil
Well draining, fertile soil
Soil pH
Neutral to slightly acidic
Temperature
-5 to 35°C
Humidity
40 to 60%
Drought tolerance
moderate
Lifespan
Perennial, typically 15 to 20 years.
Deer and rabbits
high

Señales de que necesita trasplante

  • Roots growing out of the drainage holes.
  • The plant pushes itself up and out of the pot.
  • Water runs straight through without soaking in.

Seguridad

People
The plant is generally considered non toxic to humans, though the sharp leaf edges can cause physical cuts.
Pets
This plant is generally considered non toxic to cats and dogs.
Children
Keep children away from the sharp, serrated leaf margins which can easily slice through delicate skin.
Contact allergens
The stiff, blade like leaves can cause mechanical skin irritation or cuts if handled without gloves.
Airborne allergens
There is no significant evidence that this plant acts as a common respiratory allergen.
Edibility
While the nectar is traditionally consumed, the foliage is not considered edible and should be avoided.

Cómo identificarla

  • Long sword shaped leathery leaves
  • Leaves grow in dense basal clumps
  • Tall flower stalks rise above foliage
  • Fibrous leaf texture
  • Vibrant leaf colors including bronze or variegated
Height
1 to 3m
Spread
1 to 2m
Leaves
green, bronze, red, yellow, evergreen
Flowers
red, orange, yellow, 2 to 5cm
Fruit
black, Autumn

Problemas frecuentes

  • Mealybugs These small, white, cottony insects hide in the leaf bases and suck sap from the plant.
  • Phormium leaf spot Fungal infections cause unsightly brown or black spots on the foliage, often due to poor air circulation.

Cómo cultivarla

Propagation
division, seed
When to plant
spring, autumn
Overwintering
In colder regions, tie the leaves together to protect the crown from snow and ice buildup. If you live in a very cold area, move the container into a sheltered, frost free spot for the winter.
In containers
It grows very well in containers, but you should use a pot at least 15 to 20 gallons to accommodate its large root system.

Division

  1. Dig up the entire clump in early spring.
  2. Use a sharp spade or saw to cut the root mass into smaller sections.
  3. Ensure each section has a healthy portion of roots and leaves.
  4. Replant the divisions immediately into well draining soil.

Pair with plants that have similar water needs to ensure everyone stays happy in the same bed.

Buenas compañeras

  • Hebe These shrubs provide a nice textural contrast and share similar coastal growing requirements.
  • Carex Sedges create a soft, grassy base that complements the rigid, upright form of the flax.

Mantenla lejos de

  • Small delicate flowers The aggressive root system and large size of the flax can easily crowd out smaller, slower growing perennials.

Especies parecidas

  • Mountain Flax It is a smaller, more arching relative that fits better in tight garden spaces.

Ciencia

Family
Asphodelaceae
Genus
Phormium
Order
Asparagales
Class
Liliopsida
Native range
New Zealand and Norfolk Island.
Conservation
It is not currently threatened, but wild harvesting should be done sustainably to protect local populations.

It grows in diverse habitats from swamps to coastal cliffs, utilizing its deep root system to stabilize soil.

Value to wildlife
nectar source
Pollinators
bees, birds
Uses
architectural accent, coastal landscaping, privacy screening, erosion control

A lo largo del año

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Flowering
Fruiting
Foliage

Indicadores ecológicos

Salinity
7/9
Soil reaction
5/9
Light
7/9
Temperature
6/9
Moisture
5/9
Nutrients
4/9

Taxonomía cotejada con GBIF.

Lo que más preguntan

Does it need a lot of water?
It prefers consistent moisture but is quite adaptable once established.
Can I grow it in a pot?
Yes, it makes a fantastic container plant if you use a large, heavy pot to prevent tipping.

De dónde viene el nombre

The genus name Phormium comes from the Greek word for a wicker basket, referencing the plant's use in weaving. The species name tenax means tenacious or tough, describing its strong leaf fibers.

Bueno saberlo

  • It is commonly known as New Zealand flax, though it is not related to true flax.
  • The leaves can grow up to 3 meters long in ideal conditions.
  • It is incredibly tough and thrives in salty, windy coastal environments.

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