Gladiolus tristis var. concolor is an elegant and unusual species gladiolus grown for its fragrant, creamy-white flowers. The blooms can reach around 7cm across and are carried in graceful spikes above slender foliage. Most notably, their sweet fragrance becomes particularly noticeable during the evening and at night.

Growing to approximately 70cm tall, this refined gladiolus is ideal for sunny, well-drained borders and makes an excellent cut flower. Its delicate colouring and relatively natural appearance also allow it to blend beautifully into mixed and cottage-style planting.

• Botanical name: Gladiolus tristis var. concolor
• Common name: Fragrant Gladiolus
• Plant type: Cormous perennial
• Flower colour: Cream to creamy white
• Flower size: Up to approximately 7cm across
• Fragrance: Sweetly scented, strongest at night
• Height: Approximately 70cm
• Spread: Approximately 10-15cm
• Foliage: Slender green leaves
• Position: Full sun
• Soil: Fertile, well-drained soil
• Ideal for: Sunny borders, containers, cottage gardens and cut flowers

About Gladiolus tristis var. concolor

Gladiolus tristis is a South African species quite different in character from the large, brightly coloured hybrid gladioli commonly grown in British gardens. Its flowers are more delicate and graceful, giving it a natural appearance that works particularly well amongst other herbaceous plants.

Var. concolor produces attractive cream-coloured blooms arranged along upright flower spikes. Individual flowers can reach around 7cm across, with a subtle greenish tone through the throat adding further detail.

A Fragrant Gladiolus

One of the outstanding features of Gladiolus tristis var. concolor is its fragrance. While many gladioli are grown almost entirely for their appearance, this species produces sweetly scented flowers whose fragrance intensifies during the evening and at night.

Planting it near a patio, seating area or frequently used path allows the evening fragrance to be appreciated more easily. The pale flowers are also particularly attractive as daylight begins to fade.

Where to Grow Gladiolus tristis var. concolor

Choose a warm, sunny and preferably sheltered position. The soil should be fertile but free draining, as the corms dislike prolonged waterlogging. A sunny border, raised bed or large container can all provide suitable conditions.

Its slender 70cm growth means it can be planted through mixed borders without overwhelming neighbouring plants. Small groups generally create a stronger display than isolated individual corms.

How to Plant Gladiolus Corms

Plant the corms approximately 8-10cm deep and around 10-15cm apart, with the growing point facing upwards. Incorporating grit into heavy soil can improve drainage around the corms.

Water during active growth if conditions become particularly dry, but avoid keeping the soil constantly saturated. A sheltered site will also help protect the slender flowering stems from strong winds.

Height and Spread

Gladiolus tristis var. concolor reaches approximately 70cm tall with a spread of around 10-15cm. Its narrow, upright habit makes it particularly useful where vertical interest is wanted without taking up excessive border space.

Growing Gladiolus tristis in the UK

This South African gladiolus appreciates warmth and excellent drainage. In mild, sheltered gardens with free-draining soil, corms may be grown outside, but they are less tolerant of cold, wet winter conditions than fully hardy woodland or spring bulbs.

In colder or wetter areas, growing the corms in containers provides greater control over winter conditions. Containers can be moved into a sheltered, frost-free position during periods of severe weather.

Excellent for Cutting

The graceful flower spikes are excellent for cutting and bring the plant's fragrance indoors. Cut stems as the first flowers begin opening and leave as much foliage as possible on the plant so the leaves can continue feeding the corm.

Why Grow Gladiolus tristis var. concolor?

• Beautiful cream to creamy-white flowers
• Individual blooms up to approximately 7cm across
• Sweet evening and night fragrance
• Elegant species gladiolus
• Grows to approximately 70cm tall
• Spread of around 10-15cm
• Excellent for sunny borders and containers
• Makes an unusual fragrant cut flower
• Graceful habit works well in naturalistic planting

Frequently Asked Questions

Is Gladiolus tristis var. concolor fragrant?
Yes. Its cream-coloured flowers are sweetly fragrant, with the scent becoming particularly noticeable during the evening and at night.

How tall does Gladiolus tristis var. concolor grow?
It grows to approximately 70cm tall.

What is its spread?
Each plant has a relatively narrow spread of approximately 10-15cm.

How large are the flowers?
Individual flowers can reach approximately 7cm across and are arranged along elegant flower spikes.

Where should I grow Gladiolus tristis?
Choose a warm, sunny and sheltered position with fertile, very well-drained soil.

Can I grow it in a container?
Yes. Container growing is particularly useful in colder or wetter parts of the UK because the corms can be given additional winter protection.

Is it suitable as a cut flower?
Yes. The slender stems, pale flowers and evening fragrance make it an unusual and attractive cut flower.

With its delicate cream flowers and wonderful evening fragrance, Gladiolus tristis var. concolor offers something very different from conventional gladioli and makes a particularly elegant addition to a warm, sunny garden.