Phormium Cookianum Subsp. Hookeri 'Tricolor'
Phormium Cookianum Subsp. Hookeri 'Tricolor'

Phormium Cookianum Subsp. Hookeri Tricolor – 7.5 Litre

£29.99

2 in stock

SKU: phormium-cookianum-subsp-hookeri-tricolor Category:
Common Name: New Zealand Flax
Size: 7.5 litre
Hardiness: H4
Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees ˚C) are shown in brackets

  • H1a: under glass all year (>15˚C)
  • H1b: can be grown outside in the summer (10 - 15 ˚C)
  • H1c: can be grown outside in the summer (5 - 10 ˚C)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5 ˚C)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1 ˚C)
  • H4: hardy through most of the UK (-10 to -5 ˚C)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10 ˚C)
  • H6: hardy in all of UK and northern Europe (-20 to -15 ˚C)
  • H7: hardy in the severest European continental climates (< -20 ˚C)
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This plant has won a RHS award

7.5 Litre Pot (Potted up 2nd September 2025)

  • RHS Award of Garden Merit
  • Position: Full sun
  • Soil: Well drained
  • Growth Rate: Average
  • Flowering Period: July
  • Hardiness: H4
  • Eventual Height: 1 – 1.5m
  • Eventual Spread: 1.5 – 2.5m

Phormium Tricolor, also known as ‘Mountain Flax’, holder of the prestigious RHS Award of Garden Merit, is a clump forming evergreen garden shrub.  It has colourful, sword like, erect, green leaves with creamy yellow stripes and red margins. During long hot Summers panicles of yellow/green tubular flowers are produced on tall spikes, standing proud above the leaves, providing an eye catching statement plant within the garden border or as a patio/container plant.

Looking after Your Phormium Hookeri Tricolor

Generally disease free, an easy to grow, low maintenance evergreen garden shrub, preferring a sunny area, sheltered away from any cold, drying Winter winds, ideal for the sunny border, and which will add both height and colour. A moist, well drained, fertile soil will ensure you have a healthy and happy shrub. Although generally maintenance free, remove any dead or damaged leaves /flower spikes late Spring, at the same time providing a good mulch of well rotted garden compost and a general purpose fertiliser to help stimulate plenty of fresh new growth.

 

Additional information

Brand

Lets Go Planting

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