Hibiscus syriacus 'Oiseau Bleu'

tree hollyhock ( syn. Hibiscus syriacus Blue Bird )

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2 litre pot £19.99
in stock (shipped within 2-3 working days)
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Buy Hibiscus syriacus 'Oiseau Bleu' tree hollyhock ( syn. Hibiscus syriacus Blue Bird ): Late flowering shrub with large blue flowers

This shrub is deciduous so it will lose all its leaves in autumn, then fresh new foliage appears again each spring.

  • Position: full sun
  • Soil: humus-rich, moist but well-drained, neutral to slightly alkaline soil
  • Rate of growth: average to fast-growing
  • Flowering period: August to October
  • Hardiness: fully hardy

    A late flowering shrub that comes into its own when others are looking tired, this has large, trumpet-shaped, bright blue flowers 8cm (3in) across with red centres from late summer to mid-autumn. The leaves are pretty too, three lobed, dark green and very distinctive. This deciduous shrub has an exotic feel to it, but is as much at home in a herbaceous border as it is in a tropical-style garden. It is best planted in a sunny spot as it does need a long, hot summer to flower well. It has one limitation - the new foliage doesn't appear until late spring.

  • Garden care: To encourage a bushy habit prune young plants hard in late spring. After pruning apply a generous 5-7cm mulch of well-rotted garden compost or manure around the base of the plant. Little or no pruning is needed when established except to remove dead or diseased branches in late winter or early spring. In colder areas, shrubs might need a winter mulch.

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Eventual height & spread

Eventual height and spread

Notes on Hibiscus syriacus 'Oiseau Bleu'

"The best single-blue, brought to life by a dark reddish-purple iridescent eye surrounding a cream centre - for late-summer pleasure seekers"

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Beautiful plant!


I have planted this at the bottom of the garden, in a very sunny spot. I love the flowers that appear just as the main summer flowering season comes to an end.




Beautiful plant


As a shrub in a mixed border






I purchased this hibiscus last year. It is full bloom now and looks fabulous.

Ms Greenthumbs



rather disappointing but it is promising


Small plant but healthy. Only 1 flower last summer but am hoping for good growth and more flowers this summer.




I would buy this plant again


Sent as a thank you gift to Devon.....very well received, delighted with colour and quality of plant for garden.

Mrs TP



Beautiful plant


Plant arrived in great condition and flowered all summer. Really beautiful!




I would recommend this plant


This is a superb plant for large mixed border






Thriving in a large pot until we decide where to plant it permanently.






My friend fell in love with my neighbours plant and wanted one


Leigh Lancashire



4.4 9


Please can you tell me the best time of year to move my hibiscus? It is about 18 inches tall but in a flower bed which is overhung by a tree, so it is getting very little light. I want to move it so that it will be in full sun.


Hello, The best time to tackle this is while the plant is completely dormant, so any time between late autumn and early spring.


Can you please provide me with some further suggestions of evergreen shrubs (preferably ones that flower) that will be able to be planted at the base of this hibiscus. Thank you


Hello, I would certainly consider the Hebes - please click on the following link to go straight to them http://www.crocus.co.uk/search/_/search.hebe/sort.0/ and perhaps a low-growing Ceanothus such as Ceanothus thyrsiflorus var. repens, which will give you earlier flowers http://www.crocus.co.uk/plants/_/ceanothus-thyrsiflorus-var-repens/classid.727/


I planted 2 of these plants last year & there doesn`t appear to be any flowers coming on either plant. It has got plenty of new growth. Does the hibiscus generally flower the first year?


Hello there There are a number of reasons why plants don't flower including too much shade or not enough water or nutrients, and Hibiscus particularly need a sunny spot, and lots of hot sunshine to flower. Also it could be caused by the plants putting on new root growth instead of focusing their energies on producing flowers, but given time and the right conditions, there is no reason why they won't flower. You can often give them a bit of a push by feeding during the growing season with a high potash fertiliser. Hope this helps


Hibiscus size? Hello, You are selling Hibiscus in a 3 litre pot -I want to know how tall the actual plant is when despatched please. Many thanks

Hello There, These will be around 30-45cm tall in a 3lt pot. I hope this helps. Helen Plant Doctor

Crocus Helpdesk

Hibiscus I have a three year old Hibiscus in a pot in my summerhouse. The first year there were masses of blooms, in the second very few, and this year I have plenty of buds but the leaves are turning yellow and dropping . Could you give me tips as to a cure? Donald


It sounds as if your Hibiscus may be suffering from a lack of fertiliser. This would certainly explain the lack of flowers and yellowing leaves. Plants growing in pots need to be fertilised on a regular basis as their roots cannot reach out into the soil to find their own nutrients. You can feed them by either sprinkling the surface of the compost with a slow-release fertiliser in spring, or by using a liquid feed throughout the summer.



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