Tree · Rosaceae
Almond
Prunus dulcis
Give it full sun, deep well-drained soil, and a frost-free bloom, and the almond rewards you with years of nut harvests.
Full sun
Every 7–14 days
180–240 days
USDA 7–9
Overview
The almond is a deciduous tree in the rose family, a close cousin of the peach and apricot, grown for the seed inside its stone rather than for a fleshy fruit. It hails from western Asia and the eastern Mediterranean and has long made its home in dry, sunny climates. What you crack open and eat is the kernel of a drupe, not a true nut at all.
This is a tree for warm, Mediterranean-style gardens, hardy through USDA zones 7 to 9. It blooms earlier than almost anything else in the orchard, often in February or March, and that head start is its weakness. A late frost can wipe out the flowers and the whole season's crop with them, so a frost-free bloom matters more than almost any other factor.
Almonds ask for patience and care, which is why they sit on the demanding end of the scale. Most named varieties can't set nuts on their own and need a second tree blooming at the same time to pollinate them. Give an almond deep, well-drained soil, full sun, and steady summer water, and a young tree will start bearing within a few years and keep going for decades.
Care
The short version: full sun and deep, well-drained sandy loam, with regular deep watering through spring and summer for good nut fill. Prune in winter to an open vase shape, plant a pollinizer partner, and shield the early bloom from frost.
Light
Almonds need full sun, ideally a south-facing, open site that catches light all day. They'll tolerate a little partial sun, but shade cuts into both the tree's vigor and the nut crop.
Water
Water deeply and on a regular schedule through spring and summer, roughly every 7 to 14 days, to fill the nuts out well. The tree handles drought once it's established, but it hates wet feet, so avoid waterlogged ground that invites root and crown rot.
Soil
Give an almond deep, well-drained sandy loam and it will thrive. It struggles in heavy or poorly drained ground, so a pH between 6.0 and 7.5 on loose, free-draining soil is the target.
Temperature
Almonds take a wide span of weather, from about 5°F to 104°F (-15°C to 40°C). The real risk isn't the cold of winter but a frost during the very early bloom, which can take out the flowers.
Humidity
This tree wants dry air, somewhere around 30% to 50% humidity, which is why Mediterranean climates suit it. Damp, humid conditions during bloom feed brown rot and other fungal diseases.
Feeding
Feed through the growing season, from early spring into summer, with a nitrogen-based orchard fertilizer that also carries potassium. Split the applications across the season and let a leaf or tissue test guide how much you give.
Pruning
Prune in the dormant season, in winter, training the tree to an open-center vase shape. Take out dead, crossing, and weak wood, and thin the canopy so light reaches the fruiting wood inside.
Repotting
Almonds aren't really container trees and field-grown trees are never repotted. If you do start one in a pot, don't hold it too long, or the roots circle and the tree stalls and dies back once planted out.
Size & spacing
An almond is a full-sized tree, reaching 10 to 30 feet (3 to 9 m) tall and about as wide. Give it plenty of open room so the canopy spreads and air moves freely through it.
When to plant
Almonds run on an early clock. Set bare-root trees out in late winter to early spring while they're still dormant, brace for a February or March bloom that frost can threaten, and gather the nuts from late summer into fall once the hulls split open.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: Late winter to early spring as dormant bare-root, grafted nursery trees
- Harvest: Blooms very early (Feb-Mar) and is frost-prone; nuts harvested Aug-Oct when hulls split
Hardiness
USDA hardiness zones: 7–9
Temperature: down to -18°C
Troubleshooting
Most almond trouble lands on the nuts during hull split or on the blossoms during that risky early bloom. Catch the signs at the right stage and a fungicide or a clean-up pays off; miss the window and the crop is gone. Match what you see below, then act while the timing still counts.
Tunneled kernels full of webbing and frass at harvest
This is the navel orangeworm, the worst pest an almond grower faces. The larvae bore into the nuts as the hulls split, and old mummy nuts left in the tree from last year are where the trouble starts. Clean those mummies out over winter, then treat at hull split and again 2 to 3 weeks later if pressure runs high.
Fix:
- Treat at the start of hull split and again 2-3 weeks later in moderate-to-high pressure orchards
- Harvest promptly once hulls split to limit exposure
Blossoms browning and dropping after a cold snap
Almonds bloom earlier than almost any fruit tree, so a late freeze catches the flowers wide open and kills the pistils, which turn brown or black inside. That loss of bloom means a thin crop. Protect high-risk nights with wind machines or irrigation, plant where cold air drains away, and lean toward later-blooming varieties on frosty sites.
Fix:
- Use frost protection (wind machines or irrigation) during high-risk nights
- Avoid the earliest-blooming cultivars in frost-prone sites
Shoots and leaves dying back as the hulls split
These sudden strikes come from hull rot, a pair of fungi that move in when the hulls open and release toxins that kill the spur or shoot beside them. Spray an effective fungicide at hull split, and ease off the late-season nitrogen and water so the hulls dry fast and shrug the fungus off.
Fix:
- Apply an effective fungicide (DMI or QoI) at hull split
- Reduce late-season nitrogen and water to speed hull drying
Browned blossoms and oozing twig cankers during bloom
Wet weather at bloom lets brown rot blossom blight infect the open flowers, which then collapse brown and cling to the spur while small cankers gum on the twigs. Time a fungicide to the flower stage, around pink bud and full bloom, and cut out the blighted spurs and mummies you find.
Fix:
- Apply a bloom fungicide at the appropriate flower stage (e.g., pink bud and full bloom)
- Remove blighted spurs and mummies
Toxicity
Treat this tree with real caution around animals. The leaves, bark, green hulls, and the kernels of bitter almond all hold amygdalin, which releases cyanide, and the stone fruit's high fat and whole nuts add choking and pancreatitis risk for pets. The sweet almonds people eat are safe, but keep livestock, horses, and pets away from the foliage and prunings.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Mild
A few sweet almonds usually bring on vomiting, diarrhea, and an upset stomach. The real danger is the bitter kernels and the foliage, which can trigger cyanide signs like drooling, widened pupils, and labored breathing.
Dogs Mild
Dogs tend to bolt nuts whole, so expect vomiting and diarrhea, a bout of pancreatitis from all that fat, or even a choking or blockage. Bitter almonds and any green plant parts push it further into cyanide territory.
Horses Toxic
The cyanide in wilted leaves and bark hits a horse hard, with rapid breathing, staggering, bright red gums, and collapse coming on fast. Keep horses well away from prunings and fallen branches.
Rabbits Toxic
A rabbit's small body has little margin for the amygdalin in almond leaves and twigs, and even a nibble can turn dangerous. Don't let them browse the foliage at all.
Livestock Toxic
Cattle, goats, and sheep that graze the leaves or chew the bark can take in enough cyanide to cause sudden, severe poisoning. Fence the trees off and clear any dropped prunings from the pasture.
Birds Toxic
Cyanide is acutely toxic to birds, so the green hulls, foliage, and bitter kernels are off limits for backyard poultry and pet birds alike.
People Caution
Sweet almonds from the store are low in cyanide and safe to eat. Bitter almonds are a different matter, holding enough amygdalin to be genuinely poisonous raw, which is why they aren't sold for raw eating.
Sweet (culinary) almonds sold in the U.S. are low in cyanide and edible; bitter almonds and the tree's foliage, bark, and green hulls are the cyanogenic hazard. Keep pets from chewing foliage, twigs, or fallen green hulls.
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
Poison Control: (800) 222-1222
Canada
Poison Centres: 1-844-764-7669
Varieties
Almond varieties are sorted as much by their bloom timing and shell as by flavor, since most need a partner to set nuts. These are the ones worth knowing by name.
Nonpareil
The leading California cultivar prized for its thin, smooth shells that crack open with ease, though it sets no nuts without a cross-pollinizer nearby.
Carmel
A soft-shell variety that blooms right alongside Nonpareil, which is why it gets planted with it so often as a pollinizer.
Monterey
A late-blooming hard-shell cultivar planted to stretch the bloom window and keep an orchard's pollination going.
All-in-One
A semi-dwarf tree that sets nuts on its own, making it the obvious pick for a home garden with room for only one almond.
Mission (Texas)
A hard-shelled, late-blooming variety that escapes much of the spring frost, so it earns its place in colder spots.
Companions
Plant near
Pollinizer almond varieties (e.g., Nonpareil with Carmel/Monterey): Most cultivars are self-incompatible and need a different, overlapping-bloom variety nearby for bee cross-pollination and nut set.
Flowering bee-forage cover crops (clover, mustard): Support honey bee and native pollinator activity during the critical early bloom window.
Keep apart
Peach and other Prunus stone fruits planted close by: Share pests and diseases such as brown rot, peach twig borer, and navel orangeworm, increasing pressure on the almonds.
How to propagate
You don't grow a named almond from its own seed, since it won't come true. Trees are propagated by grafting onto chosen rootstock, with seed kept for raising those rootstocks.
GraftingModerate
T-budding in late summer or bench/whip grafting onto rootstock in late winter · 3-4 years to first meaningful nut crop
A named almond won't come true from its own seed, so it gets budded or grafted onto a peach, almond, or hybrid rootstock chosen to match the soil and the vigor you want. T-bud in late summer, or bench-graft onto rootstock over the late winter dormancy. Either way the young tree takes 3 to 4 years before it carries a real crop.
SeedModerate
Stratify seed over winter and sow in spring · 1 season to seedling, several years to bear
Growing from seed means chilling it through winter and sowing in spring, which gives you a seedling in a single season but several years' wait before it bears. The catch is that seedlings don't match the parent, so they mostly end up as rootstock rather than as a way to copy a named variety.
Myths
An almond is a true nut.
The almond you eat is the seed tucked inside the stone of a drupe, the very same fruit structure you find in a peach or an apricot. It is a seed, not a true nut at all.
Every almond is equally safe to eat.
Sweet almonds grown for food carry only a trace of cyanide and are safe on the table. Bitter almonds are another story, packed with amygdalin that releases cyanide, which is why they are never sold for raw eating in the U.S.