How to Grow Sour Cherries Canada | Care, Pests & Disease Control

Diseases

Blossom wilt

low

Monilinia laxa

Named directly on RHS's own growing-guide page for acid cherries.

Silver leaf

low

Chondrostereum purpureum

Named directly on RHS's own growing-guide page for acid cherries.

Bacterial canker (Prunus)

moderate

Pseudomonas syringae pv. morsprunorum

Named directly on RHS's own growing-guide page for acid cherries.

Brown rot (stone fruit)

low

Monilinia laxa

Named among acid cherry problems in RHS's cherry-growing guide, alongside silver leaf and bacterial canker.

Peach leaf curl

moderate

Taphrina deformans

Named directly on RHS's own growing-guide page for acid cherries.

Honey fungus

moderate

Armillaria spp.

Named directly on RHS's own growing-guide page; PFAF separately states plants in this genus are notably susceptible to honey fungus.

Pests

Birds (fruit)

moderate

Aves

Named directly on RHS's own growing-guide page as a threat to ripening fruit.

Quick Facts

Factor	Value
Soil pH	6.5 - 6.7
Sunlight	4-8 hours direct sun
Minimum survivable temp	-20C
Soil texture	Loamy preferred (RHS); tolerates light, medium or heavy soils (PFAF)
Drainage	Well-drained, moisture-retentive (RHS; PFAF)
Lifecycle	Deciduous tree, self-fertile -- only one tree is needed for a crop (RHS; PFAF confirms, pollinated by bees).
Edible parts	fruit

At a Glance

Soil & Growing Conditions

Water: Water newly planted trees during dry spells for at least the first year (RHS); PFAF notes the species prefers moist soil but tolerates fairly exposed, maritime sites.

Soil pH range

6.5 6.7

Span reflects genuine variation between the cited authorities, not a single agreed figure.

Growth Stages

Stage	BBCH	Notes
Planting and establishment	0	Plant November to March while dormant (RHS). Unlike sweet cherry, acid cherry crops well in partial shade and is suitable for a north-facing wall as well as sunnier sites (RHS). On Colt rootstock it stays naturally less vigorous, at about 3.5m, making it better suited to container growing than sweet cherry on the same rootstock (RHS).
Vegetative growth	3	Self-fertile and bee-pollinated -- only one tree is needed for a crop (RHS; PFAF). Shallow-rooted and prone to suckering, especially if roots are damaged (PFAF).
Flowering	6	Flowers in spring (PFAF: May); protect blossom from frost with fleece overnight, removed by day (RHS).
Fruiting and harvest	8	Almost all fruit forms on the previous year's shoots -- left unpruned, cropping shifts to the ends of overlong branches, so pruning (as for plums) must balance older fruiting wood against younger replacement growth every year (RHS). 'Morello' harvests in late summer (RHS); PFAF records seed ripening in July.

Harvest & Storage

When to pick: Fruit ripens in late summer -- RHS gives 'Morello' as harvesting then, PFAF records seed ripening in July. Grown mainly for cooking rather than fresh eating (RHS). The fruit's seeds contain amygdalin and prunasin, which yield cyanide; generally harmless in the small quantities present, but bitter seeds should not be eaten (PFAF).

Sour Cherry Photo Gallery

Tree in blossom

A sour cherry tree in full white blossom.

Dense blossom

Dense white sour cherry blossom on the branch.

Orchard in bloom

An orchard of sour cherry trees in blossom.

Leaf detail

Sour cherry leaves on a branch.

Fruit on a branch

Ripe sour cherries on a branch with leaves.

Fruit detail

A ripe red sour cherry among green leaves.

Tree habit

A sour cherry tree on a grassy hillside.

Flowering tree in a field

A flowering sour cherry tree in a grassy field.

Blossom macro

Close-up of white sour cherry blossom with young leaves.

References

1. Plants For A Future (PFAF) - Prunus cerasus (sour cherry)

   Deciduous, 6m, UK hardy zone 3, USDA 3-7, hardy to about -20C. Flowers May, seed ripens July. Soil: light/medium/heavy, mildly acid/neutral/basic, tolerates very acid, prefers some lime but chlorotic if too much lime, well-drained moisture-retentive loam ideal. Sun or partial shade, fruits better in sun, tolerates maritime/exposed sites. Propagation: seed (2-3mo cold stratification, can take 18mo to germinate), half-ripe cuttings with heel July/August, softwood cuttings spring/early summer, layering, sucker division in dormancy. Pests/diseases: genus notably susceptible to honey fungus; shallow-rooted, suckers freely especially if roots damaged. Native SE Europe to W Asia, naturalised in Britain. Edible: fruit raw/cooked, seeds, oil, leaves (tea), trunk gum. Self-fertile, bee-pollinated. Seeds contain amygdalin/prunasin (cyanide-yielding) -- bitter seeds should be avoided.

2. Royal Horticultural Society - How to grow cherries (acid cherries)

   Acid cherries (Prunus cerasus, e.g. Morello) self-fertile, crop well in partial shade, suitable for north-facing wall (unlike sweet cherry). Soil: deep, fertile, well-drained, slightly acidic, pH 6.5-6.7, same as sweet cherry. Rootstock Colt gives ~3.5m, less vigorous than sweet cherry on same stock -- better suited to pots. Bear almost all fruit on previous year's shoots, so unpruned growth pushes cropping to branch ends; pruned like plums, balancing older fruiting wood with younger replacement branches. Plant Nov-March dormant. Water new trees during dry spells at least first year. Mulched trees need no extra feeding. Frost protection: fleece over blossom. Morello harvests in late summer. Diseases/pests: peach leaf curl, silver leaf, bacterial canker, blossom wilt, honey fungus; bird protection may be needed. Propagate by seed sown outdoors autumn, or softwood cuttings with bottom heat early summer.

2 independent sources are cited for this crop. Where they disagree - soil pH is the clearest case - every figure is preserved rather than averaged into false precision.