Plant Care Flax


About Flax

Phormium tenax is native to New Zealand. It is an evergreen, clump-forming tender perennial. It grows in average, well-drained soil in full sun to partial shade. It makes a good container plant, providing height and color contrast.


Phormium tenax

Also known as

New zealand flax and New zealand hemp

How to care for Flax


How often to water your Flax

Water needs for Flax
0.5 cups
every 9

Flax needs 0.5 cups of water every 9 when it doesn’t get direct sunlight and is potted in a 5" pot.

Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.

Calculate water needs of Flax

Water 0.5 cups every

Does your plant get direct sunlight?

Select the pot size


Check the growing potential in your area

A plant's growing potential is determined from its location, the time of year, and current local weather.

Select a city to check sunlight intensity

Finding light for Flax in your home

Light needs and placement for plant Flax: 1ft from a window
1ft or less from
a window

Flax love being close to bright, sunny windows 😎.

Place it less than 1ft from a south-facing window to maximize the potential for growth.

Flax does not tolerate low-light 🚫.

Select your region to see how the current weather in your area affects the placement of Flax in your home 🏡.


How to fertilize Flax

Nutrient, fertilizer, and repotting needs for Flax: repot after 2X growth

Most potting soils come with ample nutrients which plants use to produce new growth.

By the time your plant has depleted the nutrients in its soil it’s likely grown enough to need a larger pot anyway.

To replenish this plant's nutrients, repot your Flax after it doubles in size or once a year—whichever comes first.

Difficulty Level

Flax is generally considered an easy-to-care-for plant and makes a great choice for beginners!

Water Needs
Sunlight Needs
Growth Pattern
Growing Outdoors

Care Summary for Flax



Greg recommends:


0.5 cups every 9 days


< 1ft from a window


Repot after 2x growth

Based on the 4” pot your plant is in, and that it doesn’t get direct sunlight.

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