Ionopsidium Plant Growing & Care Guide for Gardeners

In this Gardener's HQ guide, we'll explore cultivating Ionopsidium plants in your garden, indoor spaces, and other settings.

Violet Cress, and Diamond Flower: Cultivation & Garden Use

The Ionopsidium genus are low growing hardy annuals that are between 5 and 8 cm (2 to 3 inches) in height.

This makes them ideal for use in rock gardens, in walls, or as edging plants.

The time that they flower is dependent upon when they are sown and ranges from spring through to autumn.

They carry lilac or white flowers. Some of the common names for Ionopsidium are Violet cress and Diamond flower.

Ionopsidium mypic
Ionopsidium mypic by leo123212

Ionopsidium acaule
Ionopsidium acaule by Anpena; creative commons.

Ionopsidium Growing and Care Guide

Common Names: Violet Cress, Diamond Flower, False Diamond Flower.
Family: Brassicaceae.
Life Cycle: Hardy annual.
Height: 2 to 4 inches (5 to 10 cm).
Native: Mediterranean.
Growing Region: Zones 3 to 9.
Flowers: Spring to autumn.
Flower Details: White, violet. Daisy-like ray and disc florets. Small flowers. Four petals.
Foliage: Orbicular. Green.
Sow Outside: Cover seed. Sow every two weeks from before the first frost until the summer; and once in autumn. Spacing four inches (10 cm). Germination time: two to three weeks. Temperature 55°F (13°C).
Sow Inside: No.
Requirements: Light shade. Moist soil. Cool soil; use mulch.

How to Grow Violet Cress

It is best to grow Violet cress outside in situ. The seeds should be lightly covered. Violet cress is able to grow in either sunny or partially shaded areas.

The seeds should be sown continuously from spring to autumn, this will supply a constant bloom of violet cress (Ionopsidium).

It usually takes from two to three weeks for the violet cress seeds to germinate. Once seedlings have emerged thin them out to be about 10 cm (4 inches) apart.

Violet cress and Diamond flowers like to grow in a cool moist soil.

Caring for Violet Cress and other members of the Ionopsidium Genus

Once established allow Ionopsidium plants to self seed for blooms the following year, but collect some seed for use in continuous sowing.

It may be necessary to mulch the soil in warmer areas to keep Ionopsidium roots cool.

Common Questions

How many members does the Ionopsidium genus have?

The Ionopsidium genus is small, with just a single species: Ionopsidium acaule.

Do members of Ionopsidium make a good garden or landscaping plant?

No, this plant is not typically used in gardening. This is due to its small size and non-showy flowers. It is more of a wildflower.

Which Ionopsidium species are most frequently grown by gardeners?

Its use in gardening is rare.

Are members of the Ionopsidium plant genus fragrant?

As far as I know, it does not produce any significant fragrance.

What is the perfect location to grow Ionopsidium?

Ionopsidium acaule typically grows in rocky or sandy habitats, so a well-drained substrate in full sun would be the best match.

Is Ionopsidium invasive in the USA, if so in which states?

Presently, Ionopsidium acaule is not classified as an invasive species in the USA.

How do I remove Ionopsidium plants from my garden?

If you need to remove Ionopsidium from your garden, simply pull the plant out by hand (wear gloves of course), ensuring to remove the entire root system.


The Ionopsidium genus, a member of the Brassicaceae family, it comprises of a small annual plant species native to Europe. These plants, often known as Diamondpods, are recognized by their small white flowers and round seed pods.

Ionopsidium prefers a location with full sun to partial shade and well-drained soil. Regular watering is necessary for optimal growth. Propagation is typically achieved through seeds, sown in the spring or fall.

I hope that you enjoyed this guide on how to grow Ionopsidium plants. You may also enjoy the following Gardener's HQ growing guides: How to grow wallflower, Rochea plant, and /Heliophila plants.