Sagina Plant Growing & Care Guide for Gardeners

Article by Dean Ravenscroft, Ph.D. - Updated 6th Nov 2023

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

Irish Moss, and Pearlwort: Cultivation & Garden Use

Sagina plants are mat growing hardy perennial mosses that reach about 10 cm (4 inches) in height. They have lime green lance shaped leaves, and bloom in the summer carrying tiny white flowers.

Sagina subulata (Aurea); Golden Irish Moss) by darknesschildsin.

Their size makes them a great plant for using in rock gardens, as ground cover, and for the gaps in dry stone walls.

Some common names for Sagina include Irish Moss and Pearlwort.

Commonly Grown Sagina Species

Sagina procumbens

Sagina procumbens (Procumbent Pearlwort / Birdeye Pearlwort / Matted Pearlwort), photograph by Andreas Rockstein; CC.

Sagina subulata

Sagina subulata (Irish Moss / Scottish Moss / Heath Pearlwort), picture by mrburnes99; CC.

How to grow Irish Moss and Other Sagina

The seeds of Irish Moss and other Sagina species can be sown outdoors either in autumn or the beginning of spring.

Once sown lightly cover the seed. Plants should be spaced about 10 cm (4 inches) apart unless it is a spreading variety, then they should be grown about 20 cm (8 inches) apart.

Irish Moss likes to be grown in sunny areas that have afternoon shade, and thrives in a moist, light, and sandy soil.

If starting off indoors then do so about 7 or 8 weeks before the last frost of spring.

It should take two or three weeks for the seeds to germinate at 12 degrees centigrade (54°F). Transplant them out after the last frost of spring.

Caring for Sagina

It is easy to care for Sagina plants. They like a moist soil, so water them frequently; also give them a regular feed.

It may be necessary to grow Irish Moss near plants that attract ladybirds as aphids love to feed on them.

FAQ's

What is the common name for Sagina?

The common name for Sagina is Irish Moss or Pearlwort.

What is Sagina subulata in English?

In English, Sagina subulata is known as Irish Moss or Heath Pearlwort.

Is Sagina annual or perennial?

Sagina is a perennial plant, meaning it grows for more than two years, returning each growing season.

Can Irish moss grow in full sun?

Yes, Irish Moss can grow in full sun but it prefers partially shaded areas, particularly in hotter climates to avoid drying out.

How many members does the Sagina genus have?

The Sagina genus currently has around 20-30 recognized species, depending on the source you refer to. The count varies due to differing taxonomic opinions.

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

Yes, members of the Sagina genus, also known as pearlwort, can be excellent for gardens and landscapes, particularly as a ground cover or filler between stepping stones.

Which Sagina species are most frequently grown by gardeners? (If known, also provide the common name in Parentheses)

The Sagina subulata (Irish Moss) and Sagina procumbens (Heath Pearlwort) are among the most popular species grown by gardeners for their lush greenery and tiny white flowers.

Are members of the Sagina plant genus fragrant?

No, members of the Sagina genus are typically not known for their fragrance. Their appeal lies more in their attractive green foliage and small, starry flowers.

What is the perfect location to grow Sagina?

Sagina plants prefer a location with cool summer temperatures, part shade, and moist, well-drained soil. They thrive in zones 4 to 8.

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

Presently, Sagina is not classified as invasive in the USA. However, it's always wise to check local regulations as classifications can change over time.

How do I remove Sagina plants from my garden?

Removing Sagina can be accomplished by manual pulling. Make sure to remove the entire root system to prevent regrowth. Using a garden trowel can aid in the removal process.

Summary

Sagina, also known as Irish Moss or Pearlwort, is a genus of small, herbaceous perennial plants native to Europe, North Africa, and western Asia. They form a dense, moss-like carpet of bright green or golden foliage, often studded with tiny white flowers in spring. For successful growth.

Sagina thrive in damp, cool environments and are particularly suited to rock gardens or areas with poor soil quality. They require well-drained soil, and prefers partial shade, particularly in hotter climates. Regular watering is crucial during dry periods, but take care not to overwater as this can lead to root rot.

I hope that you enjoyed this guide on how to grow Sagina. You may also enjoy the following growing guides: How to grow Dianthus plants and Sweet william.