Star moss, Sagina subulata - care

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Star moss, Sagina subulata - care: subulata

The star moss bears the botanical name Sagina subulata and is an evergreen plant that grows perennial and resembles the moss. The winter hardy plant is well suited for rockeries, for the planting of borders and paving joints, it can also be used as a replacement for a lawn. If the site conditions are correct, then the care is associated with only a relatively small effort.

Location & Planting Substrate

The star moss copes with many site conditions, it can grow almost everywhere. However, the location must not be too dry or too cold. In addition, the dainty plant feels disturbed by rapidly growing weeds and can not develop properly in such a place. In addition, the plant has the plant substrate certain requirements, otherwise there is only a meager growth. Sagina subulata prefers moist and well-drained soils. Since the roots quickly start to rot in waterlogging, a too dense and extremely loamy soil must be worked on before planting.
  • Tolerates both shady and full sun conditions
  • Needs at least 2 hours of sunshine a day
  • Ideal is partial shade
  • Grows poorly in too dry and very hot locations
  • Prefers sandy to loamy soil, with minerals
  • Optimal is neutral to slightly acidic ph value
  • Good lime compatibility
  • Moderate nutrient requirement
  • Pay attention to humus-rich plant substrate
  • Avoid waterlogging
  • Loosen extremely loamy soil with sand


When planting the respective specimens should not be arranged in rows, as this leaves an unnatural impression. Ideally, first distribute all the plants on the planned area of ​​the site and then dig them in gradually, creating a natural grown ambience. Important are sufficient planting distances, so that the plants do not interfere with each other's growth. Depending on how fast the area should be densely overgrown, more or less specimens are to be used. In addition, the area should be cleaned from weeds before planting. If the star moss proliferates too much in one location, then parts of the padding can be easily pricked out with a sharp spade in spring and fall. Thereafter, these can be replanted directly at another location, with sufficient space.
  • Ideal as a groundcover suitable
  • Also possible as edge planting and replacement for grass
  • Goes well with perennial and shrub borders
  • Ideal as underplant for larger plants
  • Also grows in pots and pots, for example for graves
  • Makes you feel good in the stone and forest garden
  • Allow about 10 to 15 young plants per square meter
  • Place between the plants about 10 to 20 cm space
  • Does not tolerate growth of foreign weeds, remove them before
  • Likewise, no larger plants close to it

Pouring & fertilizing

Starmoss - Sagina subulata

When casting it depends extremely on the site conditions. The sunnier the location, the more must the star moss be cast. For this reason, a partially shaded place should be preferred, so that the moss-like pads do not dry out. Although the Sagina subulata regenerates quickly after drought, but the beautiful flowers break after that. Only in very sunny locations additional pouring units are required, normally the rain is sufficient. If the substrate is very lean, additional fertilizer inputs are necessary.
  • Needs moderately moist to moist substrate
  • Never let the soil dry out completely
  • Half shaded areas do not require regular casting units
  • Water abundantly in full sun in the morning and in the evening
  • Do not water in a blazing midday heat
  • Monthly add some liquid fertilizer to the irrigation water
Tip: After the end of July fertilization should be stopped, so that the star moss can prepare undisturbed for the winter and stop growing.

Leaves, flowers & growth

Sternmoos is not a real moss, but is one of the carnation plants. The perennial got its name because of the moss-like attributes and the star-shaped flowers. Sagina subulata is a very easy to maintain plant and does not have to be cut or mowed. In autumn, only the fallen foliage is removed from the upholstery to leave a proper impression. Due to the even growth, it is easy to achieve a spatial effect on the site.
  • Forms small and white flowers
  • Flowers stand on upright stems
  • Flowering period from the end of May to August
  • Green leaf color with a pointed leaf shape
  • Flat-growing properties
  • Forms tight upholstery and carpets
  • Uniform growth height, forms even surfaces
  • Reached height of 3-5 cm, width is about 30cm


Starwort is a normally hardy plant, but it does not tolerate long-lasting wetness. If persistent waterlogging sets in winter due to the soil conditions, this can quickly lead to the development of root rot. Most plants do not survive the rot and die gradually. Therefore, permeable soil throughout the year is important so that the excess rainwater can always run smoothly.
  • Winter hardy to about minus 15° Celsius
  • Does not tolerate too exposed and extremely cold locations
  • Protect from too much moisture
  • Prevent winter decay caused by waterlogging
Tip: If a dense snowpack is to be expected in winter, the foliage that fell in autumn should be removed from the padding before the first snow fall. In this way, the formation of mold can be prevented.


Starmoss - Sagina subulata

Sagina subulata proliferates by self-seeding and quickly forms dense carpets under the right conditions. If you want to accelerate this process, you can multiply the starwort either by a forced sowing or by the division. The division is much faster and less expensive. In this way, the desired area can be greened in a timely manner with the distinctive groundcover.


  • The ideal time is the early spring
  • Fill the seedbed with seed soil or peat-sand mixture
  • Watch out for fine and well drained soil
  • Mix seeds with bird sand and then sprinkle
  • Sand gives the seeds the necessary weight
  • Cover only very thinly with earth
  • Carefully moisten with water sprayer
  • Cover vessel with cling film
  • Keep the plant substrate evenly and slightly damp
  • Ventilate regularly to prevent mold growth
  • Pique after sheet formation
  • Then plant in slightly fertilized soil


  • Either share in spring or autumn
  • Carefully remove the plant from the ground
  • Divide into rosettes
  • Use only sharp and previously disinfected knife
  • Replant at the new location with sufficient space

Diseases & pests

Sagina subulata is an extremely tough shrub that normally grows strong and healthy. If the conditions are right at the site and the substrate is sufficiently moist, then diseases are very rare. However, dryness and persistent waterlogging can severely damage the perennials, eventually killing off. In addition, voracious snails can be a major threat to the starwort, as it is a delicate plant and is quickly eaten by them. If children and pets use the garden, then no chemical antidotes should be used.
  • Fight snails by natural means
  • Set up traps
  • In case of emergency, lay out slug pellets
  • Susceptible to aphids and spider mites
  • Spider mites are more prone to dryness
  • Moisture eliminates these pests
  • Rinse aphids with soapy water
  • Mold infestation in continuous wet in winter possible
  • Pay attention to well drained soil

Video Board: Irish Moss Problems.

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