Hibiscus syriacus AZURRI - Rose of Sharon

Hibiscus syriacus Azuri is a relatively recent variety of bushy Mallow tree that forms a well-branched bush of medium size, with beautiful blue flowers with a red heart. This generous bush is in bloom from July to September, and it tolerates winter perfectly despite its exotic appearance. It deserves a prominent place near the house, isolated in the centre of a perennial bed, or within a varied hedge. The Hibiscus syriacus is easily grown in non-scorching sunlight or partial shade in warm climates, in slightly moist soil and even limestone, under all climates.

The Hibiscus syriacus, sometimes called Garden Hibiscus, is a hardy bush, deciduous in most climates and evergreen in warm climates, belonging to the Malvaceae family, just like hollyhocks and marshmallows. The Hibiscus genus includes tropical shrubs and small trees, such as the well-known Hibiscus rosa-sinensis or the rarer H. schizopetalus with lace-like flowers, perennial plants like H. moscheutos, whose flowers can reach 25cm (9.8in) in diameter, and H. syriacus, a hardy bush that can grow further north. It is native to temperate regions of Asia and has given rise to numerous cultivars, including this superb Azuri variety.

Azuri is part of a complete range (Rosso, Bianco, Cielo, Pastello) selected for its floribundity and ease of cultivation. This variety is the result of a crossbreeding between the famous 'Oiseau Bleu' variety and an unnamed variety, carried out by the Belgian Johan Van Huylenbroeck. This researcher from ILVO (a Flemish agricultural research institute) selected this novelty in 2003, before entrusting its propagation to a cooperative of Belgian nurserymen. Azurii was then granted a protective patent in the United States at the end of 2009. This variety has great ornamental interest: it is the first sterile blue-flowered Hibiscus. This characteristic allows it to continue flowering and growing all summer without unnecessary energy going into fruit production. It is a relatively compact, well-branched bush, but can exceed 2m (6 in 7ft) in height if not pruned, with a spread of 1.50 m (4.92 ft). The smooth, green leaves are simple and alternate, measuring about 9.5cm (3.7in) long by 5.5cm (2.2in) wide and lobed. From July to late September, it produces large single flowers, about 11cm (4.3in) in diameter, forming a wide open cup about 6cm (2.4in) deep, with petals imbricated at the base, a beautiful blue colour enhanced by a red heart. This bush is easy to grow, tolerating most soils, especially limestone, provided they are sufficiently deep.

Althaea 'Azurii' likes bright, warm exposures, and can tolerate light shade in southern regions. Plant it in soil that remains slightly moist until the end of summer to support flowering. This truly charming bush is not delicate or difficult: it can be grown in all regions, especially in small gardens. To create a colourful summer scene, associate it with other shrubs that bloom at the same time. The Lavateras, also members of the Malvaceae family, will accompany Azuri's flowering throughout the summer. Choose a variety with white flowers, unless you want to create a strong contrast by opting for pink. But perhaps you prefer to focus on other flower shapes, in which case the splendid Indian Lilacs (Lagerstroemias) will delight you with their vibrant coloured clusters. Also spectacular is the amazing Buddleia davidii Reve de Papillon White with its huge white panicles measuring 20 to 30cm (7.9 to 11.8in) long, or try Hydrangea paniculata Hercules with white-green inflorescences that can reach 35cm (13.8in).