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How to Grow Almonds Canada | Care, Pests & Disease Control
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Almonds (Prunus dulcis) — Deciduous stone-fruit tree, a close cousin of peaches and nectarines but less cold-hardy (USU).
This crop carries an unusually heavy problem load: 9 diseases and 9 pests are documented for it, so most of the effort in growing it well goes into prevention.
Core growing advice on this page is checked against named horticultural sources — see References.
Named directly by RHS (silver leaf); RHS advises pruning in mid-summer specifically if this disease presents.
Almond leaf scorch
moderate
Xylella fastidiosa
RHS names almond directly as "a high risk host for xylella fastidiosa" -- a serious biosecurity/quarantine caution rather than a currently widespread UK problem; kept honest and stated plainly rather than omitted. USU…
Phytophthora root rot
low
Named directly by USU ("Phytophthora Rot"); species not specified by USU so left at genus level.
Coryneum (shot hole) blight
moderate
Wilsonomyces carpophilus
Named directly by USU ("Coryneum Blight") as a shared peach/apricot disease that also affects almond.
Moist but well-drained; won't tolerate wet soils (RHS; USU). Tolerates chalk, loam and sand (RHS).
Lifecycle
Deciduous stone-fruit tree, a close cousin of peaches and nectarines but less cold-hardy (USU). Not self-fruitful: RHS and USU both state a second, different almond cultivar is needed for cross-pollination, moved by insects (honeybees per USU); USU adds that a compatible, simultaneously-flowering peach can also supply pollen. USU: winter cold below -10F can damage fruit buds, below -20F damages wood, and spring temperatures below 28F during or after flowering damage the blossom -- a real, specific set of thresholds rather than a vague frost warning.
Water: USU: mature trees benefit from less frequent, deeper irrigation -- water long enough to penetrate to 1ft depth, then let the soil dry for several days before watering again; shallow, frequent turfgrass-style irrigation is not ideal. Newly planted trees: 3-5 gallons per watering for the first few weeks.
Full sun and shelter, well-drained soil (RHS; USU). USU: choose a gentle slope so cold air drains away on cold nights; dig the hole wider than deep, keep the graft union 2-3in above the final soil line, and water immediately after planting. Trees are free-standing and don't need staking (USU).
Framework training and early pruning
3
USU: cut an unbranched young tree back to 30-36in at planting to force branching; on a branched tree, remove growth below about 30in and keep 4-6 evenly spaced branches to form a permanent scaffold whorl at 30-40in. RHS's pruning group 1 calls for only light, formative pruning afterward -- prune in mid-summer if silver leaf disease is present. Heavy pruning later removes the 1-year-old wood that carries flower buds and pushes the tree into vegetative water-sprout growth instead (USU).
Flowering and pollination
6
Blossoms very early -- both sources flag frost as the main risk to a crop. RHS notes flowers may need protection in vulnerable UK sites; USU gives it as hard thresholds: temperatures below 28F during or after flowering damage the blossom and prevent fruiting, and young trees can be tarped on frosty nights (cover around sunset once air temperature is above 34F, remove as it rises past freezing in the morning). Not self-fruitful: needs pollen from a different almond cultivar, or a compatible peach flowering at the same time, moved by insects such as honeybees (RHS; USU).
Establishment care
3
USU: don't allow fruit to set for the first three years -- let the tree put its energy into bearing wood instead. Heavy nitrogen feeder: roughly 1oz of actual nitrogen per tree per year of tree age (not exceeding 1/2lb/tree/year), spread evenly under the dripline. Water deeply but infrequently once established, letting the soil dry between waterings.
Fruiting and harvest
8
USU: don't expect a harvest for 4-6 years after planting. Leave nuts to mature and dry on the tree -- picked too early they are milky and damp -- then harvest by hand or by shaking branches. Remove the husk and store airtight in a dry place; shelled kernels keep indefinitely frozen.
When to pick: USU: leave nuts to mature and dry on the tree -- harvested too early they are milky and damp. Harvest by hand or by shaking branches so nuts fall.
Storage
USU: remove husks once harvested; store in a dry environment, airtight to slow oxidation of the oils; shelled kernels can be frozen indefinitely.
Soil: chalk, loam, sand; moist but well-drained; pH acid, alkaline or neutral. Sun/aspect: full sun, south- or west-facing, sheltered. Hardiness H5 (hardy in most UK locations during severe winters). Ultimate size 4-8m height and spread, 10-20 years to maturity. Pruning group 1; prune in mid-summer if silver leaf disease presents. Propagate by grafting in late winter. Pests: aphids; caterpillars and birds may cause damage. Diseases: peach leaf curl, silver leaf, honey fungus, bacterial canker, brown rot; noted as a high-risk host for Xylella fastidiosa. Early spring blossom needs frost protection in vulnerable locations.
Peer-reviewed fact sheet, published July 2017 (authors Teryl R. Roper and Rick Heflebower). Site: full sun 3/4+ of the day, well-drained soil (won't tolerate wet soils), gentle slope for cold-air drainage. Spacing: ~20x20ft at maturity (10-12ft trunk radius). Planting: hole wider than deep; graft union 2-3in above soil line; water 3-5 gallons for first few weeks. Initial pruning: unbranched tree cut to 30-36in at planting; branched tree keeps 4-6 evenly spaced branches above 30in; framework trunk clear 30-40in with a permanent scaffold whorl above. Fertility: heavy nitrogen feeders, ~1oz actual nitrogen per tree per year of age (max 1/2lb/tree/year); young trees should grow 12-18in/year, mature bearing trees 6-12in/year. Don't allow fruit-set for first 3 years. Frost: bud damage below -10F (winter), wood damage below -20F, blossom damage below 28F during/after flowering; tarp young trees on frosty nights (cover at sunset when above 34F, remove at sunrise). Irrigation: deep, infrequent (to 1ft depth, dry between); Utah's dry climate makes it essential. Pollination: not self-fruitful, needs a different almond cultivar or compatible simultaneously-flowering peach, insect-moved (honeybees). Pests/diseases (same as peach/apricot): peach twig borer, greater peach tree borer, European red mite, spider mites, Coryneum (shot hole) blight, Cytospora canker, Phytophthora root rot; also mice/rabbits (bark) and deer (shoots/bark) causing physical damage. Harvest: mature and dry on the tree, hand-picked or shaken; husk removed; store airtight (dry, long-term) or shelled kernels frozen indefinitely. Nuts typically not harvested for 4-6 years after planting.
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.
Frequently Asked Questions
What problems affect almonds?
Our data links 9 diseases and 9 pests to this crop. See the sections above for each one and how to manage it.
Plan next season before the problems start
Short-season growing is arithmetic before it is technique: days to maturity against frost-free days decides what will finish at all. The Canada Garden Planner does that subtraction for your region before you sow.
Canadian vegetable growing guides · Adapted for Canadian hardiness zones and frost dates
Every SoilCommander guide is written and maintained by our editorial team for real Canadian growing conditions, adapted to Canadian hardiness zones and frost-date data, with provincial agriculture and Canadian university extension guidance cited directly where a crop-specific source exists.
Sketch your exact plot shape, pick your crops, and get a spacing-accurate bed layout with companion pairings and a rotation plan. Spacing, companion pairings and rotation work the same in any climate — pair the layout it gives you with the Canada planting calendar for your own frost-date timing.
