Shortlisted for RHS Chelsea Plant of the Year

As Dibleys Nurseries celebrate 50 years of horticultural excellence, this exceptional Streptocarpus marks a true milestone in their breeding achievements. Developed by Lynne Dibley, the pioneering new Cape primrose is the culmination of a carefully refined programme spanning more than 10 generations, incorporating winter-flowering species alongside some of their most successful award-winning hybrids.

This long and dedicated breeding journey has produced a genuine breakthrough – a fully double variety of outstanding quality, which combines vigour, longevity and remarkable floral impact.

The result is a plant that is not only highly distinctive, but also reliable, resilient and perfectly suited to modern indoor growing conditions.

Why grow it in your garden?

Streptocarpus ‘Sirius’ stands out for several reasons:

• Fully double, inky purple flowers with deep purple veining over a pale yellow base
• Exceptionally floriferous, producing vast numbers of large blooms over a long season
• Flowers are sterile, meaning they last significantly longer than usual varieties
• Minimal
  Deadheading is the removal of flowers from plants when they have faded or died. It is done to keep plants looking attractive and encourage re-flowering.

  deadheading required, reducing maintenance
• Flower markings intensify over several days, adding dynamic visual interest
• Early flowering and vigorous growth ensure continuous performance from February through to December

Care and growing advice

Streptocarpus ‘Sirius’ is designed to be both spectacular and easy to grow, making it ideal for houseplant enthusiasts of all levels.

• How to grow Streptocarpus

Where to plant ‘Sirius’

• Best grown indoors as a houseplant in peat-free compost
• Thrives in bright, indirect light
• Ideal for windowsills, shelves and indoor displays

How to care for ‘Sirius’

• ​Water regularly, allowing the
  Can refer to either home-made garden compost or seed/potting compost: • Garden compost is a soil improver made from decomposed plant waste, usually in a compost bin or heap. It is added to soil to improve its fertility, structure and water-holding capacity. Seed or potting composts are used for growing seedlings or plants in containers - a wide range of commercially produced peat-free composts are available, made from a mix of various ingredients, such as loam, composted bark, coir and sand, although you can mix your own.

  compost to remain lightly moist but not waterlogged
• Ensure good drainage to support healthy roots
• Feed with liquid seaweed during the
  The period of time when an individual plant is in active growth. This will depend on the local climate and light levels, and can vary between different plants, although it is broadly from spring to autumn.

  growing season to encourage continuous flowering

Simple care:

• Minimal
  Deadheading is the process of removing spent flowers from plants to encourage more blooms and prevent seed production. This helps to redirect the plant's energy into producing more flowers rather than producing seeds.

  deadheading required owing to long-lasting sterile flowers
• Remove any spent or damaged leaves as needed
• Maintain consistent light levels to support flowering

With its extended flowering season, low maintenance needs and exceptional floral display, Streptocarpus ‘Sirius’ offers outstanding indoor colour with very little effort.

A truly remarkable introduction, it not only celebrates 50 years of Dibleys Nurseries, but also sets a new standard in Streptocarpus breeding.

Breeder: Lynne Dibley. Exhibitor: Dibleys Nurseries. Supplier: Dibleys Nurseries.