• Close-up of a pink and white flower of Rhodo Horizon Monarch with green leaves on a blurred green background
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Rhododendron Horizon Monarch

Rhododendron Horizon Monarch

Evergreen Rhododendron

$40.00
$40.00
Sale Sold out
Taxes included.
Pot Size/Grade

If you're looking for a rhododendron that delivers serious impact in the garden, Rhododendron Horizon Monarch is hard to overlook. This striking evergreen shrub produces large trusses of rich, vibrant creamy-peach blooms that create an impressive display through spring. Its bold flowers contrast beautifully against the deep green foliage, making it a standout feature in woodland gardens, mixed shrub borders, and cottage-style landscapes.

Reliable, hardy, and easy to grow, Horizon Monarch brings long-lasting structure and colour to New Zealand gardens while providing year-round evergreen appeal.

Why You'll Love Rhododendron Horizon Monarch

  • Masses of large, eye-catching creamy-peach spring flowers
  • Evergreen foliage provides year-round structure
  • Excellent feature shrub for borders and woodland gardens
  • Attractive to bees and pollinators
  • Hardy and well suited to many New Zealand climates
  • Creates a stunning display when planted in groups

  • Expected 5 Year Height 2.0 M Width 2.0 M

Is Rhododendron Horizon Monarch suitable for my garden?

Rhododendron Horizon Monarch is best suited in a position that gets

  • Partial shade

Rhododendron Horizon Monarch is

  • Frost Tolerant
  • Flowering
  • Attracts pollinators
  • Cold hardy
  • Evergreen

Rhododendron Horizon Monarch will thrive in soil that is

  • Acidic
  • Nutrient rich
  • Free draining

How to establish your Rhododendron Horizon Monarch?

Plant Rhododendron 'Horizon Monarch' in part shade to filtered sun.

For the best performance:

Morning sun with protection from hot afternoon sun is ideal.
In cooler parts of New Zealand, it will tolerate more direct sunlight if the soil remains consistently moist.
Choose a sheltered position protected from strong, drying winds.

How to maintain your Rhododendron Horizon Monarch once established?

Rhododendrons thrive in acidic, free-draining soils rich in organic matter.

For healthy growth:

Maintain a soil pH between 4.5 and 6.0.
Incorporate composted pine bark, leaf mould or compost before planting.
Apply a generous layer of pine bark mulch each year to conserve moisture and maintain soil acidity.
Avoid lime and alkaline fertilisers.

Good drainage is essential to prevent root problems.

Water regularly during the first year while the plant establishes a strong root system.

Keep the soil consistently moist, particularly:

During prolonged dry periods.
Throughout summer while flower buds are developing.
During hot or windy weather.

Avoid allowing the soil to become waterlogged.

Feed annually after flowering with a fertiliser formulated for rhododendrons and other acid-loving plants.

For continued vigour:

Apply compost around the drip line.
Refresh organic mulch annually.
Avoid excessive nitrogen, which encourages foliage growth instead of flowers.

Very little pruning is required.

After flowering:

Remove spent flower trusses by gently snapping them off.
Remove dead, damaged or crossing branches.
Lightly shape if required.

Avoid heavy pruning unless rejuvenating an older plant.

'Horizon Monarch' is well suited to New Zealand winters.

During winter:

Maintain a protective mulch layer around the root zone.
Water only during prolonged dry periods.
Protect developing flower buds from accidental damage.
Frost and Climate

Rhododendron 'Horizon Monarch' is highly frost hardy and performs well throughout New Zealand.

Established plants tolerate heavy frosts with ease, making them ideal for cooler gardens and inland regions.

This variety is generally healthy and easy to grow when planted in suitable conditions.

Occasionally inspect for:

Lace bug
Thrips
Aphids
Root rot in poorly drained soils

Providing good drainage and maintaining even soil moisture will prevent most issues.
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