Ornithogalum dubium, commonly known as Star of Bethlehem or Orange Star, is a striking bulbous perennial producing clusters of brilliant golden yellow-orange flowers with contrasting dark greenish centres. The open, star-shaped blooms are carried in generous clusters above broad green foliage, creating an exceptionally bright spring display.

Flowering during April and May and reaching around 20-30cm tall, this South African species is particularly attractive in pots and patio containers, where its intense orange colouring can be appreciated at close range. It enjoys plenty of sunshine and excellent drainage and can also be grown in warm, sheltered garden positions.

• Botanical name: Ornithogalum dubium
• Common names: Star of Bethlehem, Orange Star
• Plant type: Bulbous perennial
• Flower colour: Golden yellow-orange with dark greenish centres
• Flowering time: April-May
• Height: Approximately 20-30cm
• Spread: Approximately 15-20cm
• Position: Full sun
• Soil: Fertile, very well-drained soil or compost
• Hardiness: Tender to frost; best protected over winter
• Ideal for: Pots, patio containers, conservatories and sheltered sunny borders

About Ornithogalum dubium

Ornithogalum dubium originates from South Africa and stands out from the predominantly white-flowered species of Ornithogalum with its exceptionally vivid colouring. Numerous flowers are carried together on sturdy stems, with each individual bloom opening into a neat six-pointed star.

The petals range from rich yellow-orange to brilliant tangerine, surrounding a contrasting darker centre. Planted in groups, the flowers create an intense splash of colour that works particularly well against simple green foliage or neutral-coloured containers.

Where to Grow Ornithogalum dubium

Choose a warm, sunny position with excellent drainage. This species enjoys plenty of light and will generally produce its strongest flowering display when given several hours of direct sunshine each day.

In the UK it is particularly well suited to containers because it is not reliably hardy through cold, wet winters. Pots can be displayed outside during suitable weather and moved into a frost-free greenhouse, conservatory or other protected position when necessary.

How to Plant Ornithogalum dubium Bulbs

Plant the bulbs approximately 5-8cm deep with their pointed tips facing upwards. Allow roughly 10-15cm between bulbs in garden soil, or plant several together somewhat more closely in a container for a fuller display.

Use fertile but free-draining compost. Adding horticultural grit can be beneficial, particularly in containers, as the bulbs dislike remaining in saturated conditions.

Height and Spread

Ornithogalum dubium remains relatively compact, reaching approximately 20-30cm tall with a mature spread of around 15-20cm. This manageable size makes it particularly useful for windowsills, patios and smaller container displays.

Growing in Containers

Orange Star performs exceptionally well in pots. Choose a container with good drainage holes and position it somewhere sunny. Water when actively growing but allow excess water to drain freely rather than leaving the pot permanently wet.

The bright orange flowers also make an attractive seasonal display in a bright conservatory or cool indoor position.

After Flowering and Winter Care

Once flowering finishes, allow the foliage to remain until it naturally begins to yellow. The leaves continue feeding the bulb and building reserves for future growth.

As the plant enters dormancy, reduce watering. In colder parts of the UK, bulbs are safest kept frost-free and relatively dry during winter. Container cultivation makes this seasonal protection straightforward.

Why Grow Ornithogalum dubium?

• Exceptionally vivid orange flowers
• Distinctive star-shaped blooms
• Contrasting dark greenish flower centres
• Flowers during April and May
• Compact 20-30cm height
• Spread of approximately 15-20cm
• Excellent for sunny patio containers
• Ideal for conservatories and protected cultivation
• An unusual alternative to traditional spring bulbs

Frequently Asked Questions

When does Ornithogalum dubium flower?
It normally flowers during April and May, producing clusters of brilliant orange star-shaped blooms.

How tall does Ornithogalum dubium grow?
Plants typically reach approximately 20-30cm tall.

What is the spread of Ornithogalum dubium?
An established plant usually spreads around 15-20cm.

Does Ornithogalum dubium need full sun?
Yes. A bright, sunny position is ideal and encourages strong flowering.

Can Orange Star be grown in pots?
Yes. Containers are an excellent choice and make it easier to provide the sharp drainage and winter protection this species prefers.

Is Ornithogalum dubium hardy in the UK?
It is not reliably frost hardy in most UK gardens. Growing the bulbs in containers and protecting them from frost and excessive winter wet is the safest approach.

Should I remove the foliage after flowering?
No. Allow the leaves to yellow and die back naturally so they can replenish the bulb before dormancy.

With its brilliant orange star-shaped flowers, compact habit and unusual colouring, Ornithogalum dubium is an eye-catching spring bulb for sunny containers, conservatories and carefully chosen sheltered garden positions.