How to Grow Parochetus Plants

Guide to Growing Shamrock Pea, Blue oxalis.

Parochetus are low growing hardy or half hardy perennials that reach about 3 to 5 cm (1 to 2 inches) in height.

They flower from summer and through autumn with pea-like flowers of blue and have a foliage similar to that of clovers.

The size and trailing nature of Parochetus makes them ideal for use in rock gardens, or for use as an addition to other plants in a container.

One of the common names for Parochetus is the Shamrock pea.

Parochetus communis
Parochetus communis by peganum.

Parochetus Growing and Care Guide

  • Common Names: Shamrock Pea, Blue oxalis.
  • Life Cycle: Hardy perennial. Half-hardy perennial.
  • Height: 4 to 8 inches (10—20 cm).
  • Native: Asia, Africa (Mountainous regions).
  • Growing Region: Zones 6 to 9.

  • Flowers: Summer and through autumn.
  • Flower Details: Intense Blue; some sub-species have white or purple flowers. Pea-like. Single or up to three flowers atop 3 to 6 inch (8—15 cm) long stalks.
  • Foliage: Trifoliate clover shaped leaves up to 0.8 inches (20 mm) long by 1.6 inches (40 mm) across. Herbaceous.

  • Sow Outside: No.
  • Sow Inside: Cover seed. Seeds should be soaked for a day in warm water. Germination time: One to three months. Temperature: 50°F (10°C). Seven or eight weeks in advance. Transplant outdoors in spring or autumn. Space at 12 to 20 inches (30 to 50 cm).

  • Requirements and care: Full sunlight or light shade. Good drainage. Moist soil. Grit. Poor soil for best flowers. Regular watering during dry periods. Propagate: by dividing in early spring or autumn. Or take cuttings.
  • Family: Fabaceae.
  • Closely Related Species: Beans, Peas, and other Legumes.
  • Miscellaneous: Genus contains just one species: Parochetus communis.

How to grow Parochetus

When growing from seed it is best to start to grow Shamrock pea indoors. The process should be started about eight weeks before they are due to be planted outdoors.

The seeds should first be soaked for a day in warm water, then germinated at 10 degrees centigrade (50°F).

It should take about one to three months for Parochetus seeds to germinate.

Once ready, transplant the seedlings into the garden about 30 to 40 cm (12 to 16 inches) apart, either in spring or autumn.

They are able to grow in either a sunny or lightly shaded location that has good drainage.

Ideally the soil that plants grow in should be poor, gritty, and moist. These conditions will help to produce more flowers.

Caring for Shamrock pea - Parochetus

Shamrock pea and other Parochetus are very easy to look after. They should be watered regularly to keep the soil that they grow in moist.

If you require more Parochetus plants, then they can be propagated by division or taking cuttings in the autumn, or at the start of spring.

Common Questions

How many members does the Parochetus genus contain?

The Parochetus genus contains a single species, known as Blue oxalis or Shamrock pea.

Do Parochetus members make a good garden or landscaping plant?

Yes, Blue oxalis is a lovely ground cover plant known for its beautiful blue flowers and clover-like leaves, suitable for rock gardens or borders.

Which Parochetus species are most frequently grown by gardeners?

The single species in this genus, Parochetus communis (Blue oxalis or shamrock pea), is commonly cultivated.

Are Parochetus plants fragrant?

Parochetus plants do not typically possess a notable fragrance.

What is the perfect location to grow Parochetus?

Blue oxalis thrives in well-drained soil and partial to full shade. It is particularly well-suited to rock gardens.

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

Presently, Parochetus is not reported as being invasive in the USA.

How do I remove Parochetus plants from my garden?

Remove Parochetus plants by carefully digging them out, ensuring you remove all roots to prevent regrowth.


The Parochetus genus is part of the Fabaceae family. it features perennial plants that are often referred to as Blue Oxalis or Shamrock Pea. They are known for their clover-like leaves and striking blue flowers.

Members of the Parochetus genus thrive in partially shaded locations with moist, well-drained soil. Planting can be done in spring or autumn. They are excellent choices for rockeries, borders, or ground cover, bringing color and texture to the landscape.

I hope that you enjoyed this guide on how to grow Parochetus plants. You may also enjoy the following Gardener's HQ growing guides: How to grow Fenugreek, Galanthus plant, and Thermopsis plants.