Serbian spruce

Sun

Full sun is best; tolerates light partial shade.

Water

Moderate; keep the root zone evenly moist while establishing. Established trees tolerate short dry spells, but prolonged drought causes stress.

Soil

Moist, well-drained loam is ideal. Tolerates clay if drainage is adequate and accepts acidic to moderately alkaline soil.

Height

40-60 ft (12-18 m), occasionally taller with age

Spread

15-20 ft (4.6-6.1 m)

Foliage

Evergreen. Short, flattened needles are glossy dark green above with two conspicuous white bands beneath. Branches droop, with upturned tips; small hanging cones mature brown.

Growth

Moderate, commonly 12-24 in (30-60 cm) a year once established in suitable conditions.

Care needed

Low

• Deer resistant
• Cold hardy
• Wildlife

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Easy

Toughness

Fairly tough

Pick your zone, country, light and whether you have pets.

1. Planting day

   7 ft (2 m)

2. After 1 year

   9 ft (2.7 m)

3. After 2 years

   11 ft (3.3 m)

4. After 3 years

   13 ft (4 m)

5. After 5 years

   17 ft (5.3 m)

About 20 years to full size.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Mildly toxic: may upset a stomach

Growth rate

Moderate

• Plant with the root flare at soil level, leaving enough space for the mature crown.
• Water deeply during dry weather for the first two or three growing seasons; do not leave the soil waterlogged.
• Spread 2-3 in (5-8 cm) of organic mulch over the root zone, keeping it clear of the trunk.
• Feed only if growth is poor and a soil test indicates a nutrient shortage.
• Stake only if the root ball moves in the wind; use flexible ties and remove supports once the roots hold firmly.

Pruning. Little pruning is needed; remove dead, damaged or competing leaders in late winter or early spring. Keep the main leader intact, and avoid topping or cutting back into bare old wood, which rarely regrows.

Late winter

Check the leader and remove broken or dead branches; gently brush off loose, heavy snow rather than pulling frozen branches.

Spring

Plant when the soil is workable and not waterlogged, then water thoroughly.

Late spring

Check new growth and inner needles for aphids, fine webbing or unusual browning.

Summer

Water young trees deeply during dry spells and check soil moisture beneath the mulch.

Autumn

Top up mulch without burying the root flare; in cold climates, water before the ground freezes if autumn has been dry.

• Use as a vertical specimen in a lawn or large border, allowing the lower branches to reach the ground.
• Plant in loose groups to create an evergreen backdrop for deciduous shrubs and perennials.
• Use its narrow outline to frame a distant view without the broad crown of many other spruces.
• Combine with birches, ornamental grasses and low groundcovers for contrasting bark, texture and winter structure.

Garden styles it suits: Architectural minimal, Woodland, Winter interest, Grand estate, Low-maintenance and Mountain lodge.

Plant it with: Silver birch, Witch hazel, Japanese forest grass, Hellebores, Epimedium and Hardy geraniums.

Wildlife: Dense evergreen branches provide shelter and nesting sites for birds. Seeds are eaten by some birds and small mammals.

• Spruce spider mites cause stippled, dull or browning needles and fine webbing, often in cool spring or autumn weather. Confirm mites by tapping a branch over white paper; hose accessible foliage and use a labelled mite treatment only if damage continues.
• Spruce aphids can cause yellowing and loss of older needles. Inspect inner branches in mild winter and spring weather; encourage natural predators and use a labelled insecticidal soap on accessible infestations if needed.
• Needle-cast diseases can brown older needles and thin the lower crown. Avoid overhead irrigation, improve airflow and seek a diagnosis before considering fungicide treatment.
• Waterlogged soil can cause root rot and progressive decline. Correct drainage and avoid excess watering; badly affected trees may need removal rather than treatment.

Not known to be toxic to people, cats, dogs or horses. Needles, cones and resin can cause physical irritation, and swallowing substantial amounts of needles may cause digestive upset; it is not a food plant.

• Norway spruce (Picea abies)

  Usually develops a broader crown and much longer hanging cones. Its needles are four-sided rather than flattened and lack the conspicuous paired white bands beneath Serbian spruce needles.

• Sitka spruce (Picea sitchensis)

  Also has flattened needles with pale undersides, but they are stiff and sharply prickly. Mature trees generally become much broader and larger than Serbian spruce.

• Oriental spruce (Picea orientalis)

  Has very short, dark green needles that are four-sided and lack Serbian spruce's strongly contrasting white undersides.

The common name refers to its native Balkan range, while omorika comes from the Serbian name for the tree.

Propagation. Usually grown from seed, with cold, moist stratification used to improve germination. Named cultivars are generally grafted by specialist nurseries because seedlings do not reliably retain their characteristics.

Accepted botanical name

Picea omorika

Native range

Yugoslavia.

Measured

Average height 3000 cm.

Sources: GBIF (CC BY 4.0) and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.