Saskatoon Serviceberry: Two Outstanding Varieties for Your Garden

The slender columnar ‘Obelisk’ and the ultra-hardy ‘Krasnojarskaja’

The saskatoon serviceberry (Amelanchier alnifolia) is one of the most rewarding and resilient fruiting shrubs for both ornamental and productive gardens. In this article we compare two varieties of completely different character: the Belgian ‘Obelisk’ with its slim columnar habit for tight spaces, and the Russian ‘Krasnojarskaja’, bred for the extreme frosts of Siberia and known for record harvests of large berries.

−52 °C
frost tolerance (Krasnojarskaja)
30 kg
yield per mature shrub
16–18 mm
berry diameter
1 m
narrowest width (Obelisk)

‘Obelisk’ PBR – a slim column for the small garden

A Belgian variety selected at the Kalmthout Arboretum and introduced in 1994. Its narrow, upright growth fits where spreading shrubs simply have no room.

  • Columnar habit: only 1 to 2 m wide and 3 to 4.5 m tall depending on pruning.
  • Ornamental value: white star-shaped flowers, bronze new growth and brilliant yellow-orange autumn colour.
  • Tasty fruit: small blue-purple pomes with an excellent sweet flavour.
  • Easy care: fully hardy, wind- and drought-tolerant, and adaptable to many soil types.

‘Krasnojarskaja’ – a record-breaker for hardiness and yield

A Russian variety bred for the harsh conditions of the central zone and Siberia. It is among the toughest fruit plants in the world and, when mature, resembles a small tree with an umbrella-shaped crown.

  • Extreme hardiness: survives frosts down to −52 °C without damage.
  • Large berries: juicy fruit 16 to 18 mm across, sweet and free of any astringency.
  • Record yield: a mature shrub produces 25 to 30 kg of fruit.
  • Ripe fruit does not drop and holds firmly on the branches, making staggered picking easy.

Side-by-side comparison

Feature ‘Obelisk’ ‘Krasnojarskaja’
Origin Belgium (Kalmthout, 1994) Russia (Siberia, Urals)
Habit narrow, columnar, upright multi-stemmed, umbrella-shaped crown
Height 3 – 4.5 m 3 – 4 m
Width just 1 – 2 m wider, spreading
Berries small blue-purple pomes very large (16 – 18 mm, ~2 g), purple-black
Flavour excellent, sweet harmoniously sweet, no astringency, jelly-like flesh
Hardiness USDA 5a – 8b (to ~ −29 °C) ultra-hardy (to −52 °C)
Yield moderate (ornamental & productive) exceptionally high (25 – 30 kg)
Harvest time in summer July – August, gradually in 2 – 3 passes
Main use specimen, small and narrow gardens, ornament fresh eating, jams, syrups, edible hedges

← Swipe the table sideways →

Frost hardiness – which variety endures more?

The lowest temperature each variety survives without damage. The longer the bar, the hardier the plant. Here ‘Krasnojarskaja’ stands at the very top.

‘Krasnojarskaja’ −52 °C
 
‘Obelisk’ (USDA 5a) to −29 °C
 

Scale relative to a 0 to −60 °C range.   ← Swipe sideways →

Growing tip

Both varieties fruit best in full sun. They prefer moderately moist, well-drained soil with an acidic to neutral pH (roughly 5.1 – 7.5). Once well established they are highly drought-tolerant, so they thrive with minimal care.

Please note

Birds are just as fond of the sweet serviceberries as we are. If you want the harvest for yourself, cover the shrubs with protective netting as the fruit ripens. The berries ripen gradually, so plan to pick over several dates.

The serviceberry unites three virtues in a single plant: spring blossom, summer fruit and fiery autumn foliage. Few plants give so much across the whole season.

How to tell when the fruit is ripe

Green and firm: the fruit is unripe, sour and astringent – wait a little longer.
Reddish to purpling: the colour is developing, but the flavour is not yet full.
Purple-black with a waxy bloom: the fruit is fully ripe and sweetest – the ideal time to pick.

Plant your own serviceberry

You will find the columnar ‘Obelisk’, the record-setting ‘Krasnojarskaja’ and other proven serviceberry varieties in our shop – healthy young plants for both beauty and a generous harvest.

Browse the varieties →

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