Hibiscus syriacus 'Oiseau Bleu'
tree hollyhock (syn. Blue Bird )
The best single-blue, brought to life by a dark reddish-purple iridescent eye surrounding a cream centre - for late-summer pleasure seekers
- 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 just 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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Q: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?Asked on 8/30/2013 by Sandie from Ringmer, East Sussex
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 helpsAnswered on 9/2/2013 by Georgina from Crocus
Hello, You are selling Hibiscus in a 3 litre pot -I want to know how tall the actual plant is when despatched please. Many thanksAsked on 7/20/2009 by Anonymous
A:Hello There, These will be around 30-45cm tall in a 3lt pot. I hope this helps. Helen Plant DoctorAnswered on 7/21/2009 by Crocus Helpdesk
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? DonaldAsked on 7/5/2006 by Donald
A: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.Answered on 7/6/2006 by Crocus
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