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Hibiscus syriacus Ultramarine (R) Tree Hollyhock
Hibiscus syriacus Ultramarine (R) Tree Hollyhock
Hibiscus syriacus Ultramarine (R) Tree Hollyhock
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Hibiscus syriacus 'Ultramarine' (R) Tree Hollyhock

Create a fabulous tropical look with this fabulous hardy Hibiscus 'Ultramarine'.
  • Add a touch of the exotic to your garden with this fully hardy shrub
  • Easy to grow, the abundant, blousy flowers will fill your borders or pots with vibrant colour
  • It'll bring a lush, tropical feel to your garden with its large blooms
  • The purple-blue flowers will attract butterflies and other valuable wildlife into your garden
  • Supplied as a dormant bare root plant ready for immediate planting

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Bare Root
Item: 500205
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Bare Root - Item: 500205
DEAL PRICE £4.99
RRP £9.99
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Product Information

Also known as the tree Hollyhock or the Rose Mallow, Hibiscus syriacus 'Ultramarine' is covered in large, purple-blue blooms from July - not stopping until all buds have opened, sometimes right into September.

'Ultramarine' is a medium-sized, deciduous shrub with strongly lobed, dark green leaves and blush-purple flowers up to 9cm (3.5in) in width, each with a bright maroon blotch at the base of every petal. The flowers shimmer faintly with iridescence in the sun, making this a garden plant that everyone will comment on.

Despite its exotic looks, Ultramarine is very tough, winter hardy and easy to care for, and is best placed in a prominent position, where it will bring a colourful display when other plants are beginning to look tired.

Supplied as a dormant bare root plant ready for immediate planting, 'Ultramarine will reach approx. 2m x 1.5m (6 ft x 5 ft).

What Is Supplied

Item 500205 supplied as:
Supplied as a dormant bare root plant ready for immediate planting, 'Ultramarine will reach approx. 2m x 1.5m (6 ft x 5 ft).

Plant Care Information

Plant In Sunshine
Plant In Sunshine
Winter Hardy
Winter Hardy
Easy To Grow
Easy To Grow

Top Tips

  • Grow Hibiscus Ultramarine in a warm, sunny spot for the longest lasting and biggest displays - it can be a hungry feeder, so give it plenty of feed through the growing season.
  • To ensure plenty of flowers, plant in a sunny position, sheltered from strong winds.

Care Information

Planting Advice for Hibiscus 'Ultramarine':

  • Grow in a moist but well-drained soil in a sheltered position in full sun.
  • Select an appropriate spot for your plants, making sure that you give them enough space to grow to their full size.
  • Dig a hole twice the width of the roots, forking over the bottom to loosen the soil, and add some good quality fertiliser such as Blood Fish & Bone.
  • Aim to plant at the same depth as the soil mark on the trunk.
  • Holding the tree or plant upright in position with one hand, slowly backfill the hole with soil, and gently shake the plant, so the soil falls back around the roots.
  • Use your heel to compact the soil around the plant to ensure good contact around the roots.

 

Aftercare Advice for your Hibiscus:

  • Water 'Ultramarine' well and regularly for the first few months until established.
  • Once planted, keep the area free of competing weeds.
  • Apply a generous layer of mulch around the base of the plant after planting and thereafter annually.
  • Hibiscus can be bare of leaves right up until May, so don't think that your plant has expired - keep it well-watered and it will burst into life when ready!

 

Pruning Advice for Hibiscus Ultramarine:

  • There is no real need to prune for the first two years then prune to the shape and size you want. Remove any broken, diseased or crossing branches in late autumn or winter to control size.
  • Prune established trees in summer using good quality secateurs, removing weak shoots, and cutting out those that cross over each other, to create an evenly spaced bowl shape.
  • Prune back two or three buds in the late winter months or early spring to encourage larger flowers the following summer - if the shrub is left unpruned, it will continue to produce numerous blooms, but they will often be smaller in diameter.
  • Hibiscus flower on the current season's growth, so pruning encourages them to flower prolifically.

Planting/Flowering Calendar

Best Time To Plant
When Your Plant Will Flower
When Your Plant Will Fruit
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Fully Grown Plant Dimensions (approx)

Plant Dimensions
200 cm
150 cm
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2. Should any hardy plant fail to thrive thereafter, we'll replace free of charge - you just pay the P&P
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