College of Agriculture, Health and Natural Resources

Plant Database

Pinus mugo

Swiss Mountain Pine, Mugo Pine

Pinaceae

Swiss Mountain Pine, Mugo PineSwiss Mountain Pine, Mugo PineSwiss Mountain Pine, Mugo PineSwiss Mountain Pine, Mugo PineSwiss Mountain Pine, Mugo PineSwiss Mountain Pine, Mugo PineSwiss Mountain Pine, Mugo PineSwiss Mountain Pine, Mugo PineSwiss Mountain Pine, Mugo PineSwiss Mountain Pine, Mugo PineSwiss Mountain Pine, Mugo PineSwiss Mountain Pine, Mugo PineSwiss Mountain Pine, Mugo Pine
Expand

Habitat

  • native to mountainous areas in Central and Southern Europe
  • cold hardy to zone 2

Habit and Form

  • evergreen dwarfed tree
  • dense shrub growth habit to multi-trunked tree
  • varies in size from 5 to 20', with equally varying spread
  • some specimens have reached 50' tall
  • medium texture
  • slow growth rate

Summer Foliage

  • rigid and slightly curved needles
  • needles in fasicles of 2's
  • margins serrate
  • needles 1 to 2" long
  • bright green color

Autumn Foliage

  • no fall color (remains green)
  • needles persist 5 years

Flowers

  • monoecious
  • no ornamental value

Fruit

  • dark gray cone
  • ovoid, 1 to 2" long
  • held in clusters of 2 to 4, or found alone
  • tip of cone surrounded by a darker ring

Bark

  • gray
  • plated appearance, but does not peel
  • when leaves abscise, rough protuberances are left

Culture

  • prefers a deep, well-drained, loose soil, but also quite adaptable
  • sun to partial shade
  • easily transplanted
  • part of the new candles (spring growing shoots) can be removed to slow size increase and change shape; removal of older tissue by direct pruning yields varying results

Landscape Uses

  • groups or mass planting
  • possibly a good specimen
  • foundation planting
  • evergreen border
  • one of the few pines tolerant of some shade

Liabilities

  • scales can be a pest problem
  • shoot tip moth damages new candles
  • although often considered a dwarf, actually variability in size, so cultivar choice is critical

ID Features

  • needles in 2's, stiff and curved
  • protuberances left by abscised leaves
  • generally dwarfed appearance
  • small resinous buds, which are hard to see
  • dark ring around cone tip
  • bark is scaly

Propagation

  • by seed, no treatment or dormancy is needed for good germination
  • cultivars are grafted on seedlings or by cuttings

Cultivars/Varieties

var. mugo (also listed as var. mughus) - This is a low-growing variant that reaches 8' tall and up to twice as wide. Thus, small container plants carrying this name at nurseries will not stay small.

var. pumilio - A prostrate, open growing plant, this form can reach 10' wide and only a few feet tall. Small plants purchased under this name can be expected to grow large in time.

'Amber Gold' (perhaps the same as 'Pot O' Gold') - A mounding selection that is compact and slow-growing, this plant truly shines in winter. The needles turn orange-yellow in the cold months, fading to green once again as spring commences. This novel habit adds interest to the winter landscape.

'Mops' - A popular dwarf form (to 3' tall), this plant remains very tight and small naturally without pruning.

'Slowmound' - Another popular true dwarf selection (to 3' tall), this cultivar forms a dark green, dense mound and won't outgrow its planting space. Similar true compact clones include: 'Paul's Dwarf', 'Sherwood Compact', 'Valley Cushion' and 'White Bud'. The latter has bright white, resinous winter buds.

'Tannenbaum' - A larger grower, this plant forms a nicely pyramidal "Christmas Tree" shape with dense habit and deep green needles. It grows 10' tall with a spread of 6'. Its extreme hardiness, to USDA zone 2, makes it a good choice for a dwarf pine in cold areas.

'Teeny' - Perhaps the smallest form available, this selection exhibits very short needles and short growth to form a compact bun.

© Copyright Mark H. Brand, 1997-2015.

The digital materials (images and text) available from the UConn Plant Database are protected by copyright. Public use via the Internet for non-profit and educational purposes is permitted. Use of the materials for profit is prohibited.

Citation and Acknowledgements: University of Connecticut Plant Database, https://plantdatabase.uconn.edu/, Mark H. Brand, Department of Plant Science and Landscape Architecture, Storrs, CT 06269-4067 USA.