Tree · Rosaceae
Apple
Malus domestica
Give it full sun, a pollination partner, and a yearly prune, and an apple tree feeds you for decades.
Full sun
Every 7–14 days
USDA 3–8
8–30 ft · 2.4–9 m
Overview
An apple tree is one you plant for the long haul. It's a member of the rose family, and people have been breeding and grafting it for thousands of years into all the named varieties you spot at the store. Put one in good ground and it can keep producing for 30 years or more, becoming a permanent part of the yard rather than just this season's project.
The thing that trips up most beginners is pollination. Most apple cultivars can't fertilize their own flowers, so a tree on its own will bloom gorgeously and then set hardly anything. Want a real crop? You'll need a second, compatible variety flowering at the same time within bee range, or a crabapple handling that job nearby. So plan on two trees right from the start, or make sure a neighbor's already got one.
And there's one last factor that decides whether an apple will even work where you are: chill hours. The tree needs a good run of winter cold to break dormancy and flower come spring, and different cultivars ask for different amounts. So match the variety to your zone, give it sun and a yearly prune, and after that it's just the slow, patient business of letting a tree grow up.
Care
The short version: full sun all day, deep well-drained soil somewhere around a pH of 6.0 to 7.0, and a second compatible variety nearby to handle pollination. Keep young trees well watered, prune every winter, and don't overdo the nitrogen so the growth stays nice and tough.
Light
An apple tree is after full sun, which works out to 6 or more hours of direct light a day, and it really won't put up with shade. That sun powers the flower buds and ripens the fruit, so park one in the shade and you'll get weak growth, more disease, and a skimpy crop.
Water
Young and freshly planted trees want steady water while their roots are still reaching out, so soak them deeply every 7 to 14 days during dry stretches. Once a tree's established it handles drought pretty well, but even moisture still helps it size up and set a better crop. Let the top half of the root zone dry out between waterings.
Soil
Go for deep, well-drained loam loaded with organic matter, and stay away from waterlogged or compacted spots that'll rot the roots. A pH of 6.0 to 7.0 keeps apples happy, sitting right around neutral.
Temperature
Apples are pretty rugged, taking on a range of about -40°F to 95°F (-40°C to 35°C) through the year, and they do well in hardiness zones 3 to 8. They also need a good spell of winter chill before they'll flower, so be sure to match the cultivar to your zone.
Humidity
Plain outdoor air in the 40% to 70% range is just fine, so there's no figure to lose sleep over. What counts way more is airflow, because damp, crowded branches are how scab and the other fungal diseases get their start.
Feeding
Feed it once in early spring before the new growth kicks off, using a balanced or nitrogen-based fertilizer. Just go easy on the nitrogen, since a burst of soft growth is exactly what fire blight loves to feed on.
Pruning
Prune every year in late winter while the tree's dormant, training it to a strong central leader or an open center. Take out any dead, diseased, or crossing wood and open up the canopy so light and air can get to the fruit. A light summer trim helps you keep an overeager tree in line.
Repotting
Apples belong in the ground, not a pot, so most trees never need repotting at all. The one exception is a dwarf tree in a large container, which wants a refresh or a bump up to a bigger pot every 2 to 3 years to keep its roots content.
Size & spacing
Mature size varies a lot with the rootstock, anywhere from a dwarf around 8 feet (240 cm) up to a standard near 30 feet (9 m) tall and nearly as wide. Spread lands somewhere around 8 to 25 feet (2.4 to 7.5 m), so give each tree the room to reach full size without bumping into its neighbors.
When to plant
An apple tree keeps a slow, steady calendar. Get bare-root trees in the ground in early spring once it thaws and the tree's still dormant, then watch for blossom in mid to late spring. After that the fruit ripens from late summer into fall, roughly August to October depending on which cultivar you've got.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: Early spring while dormant, after the ground thaws, for bare-root trees; container trees can go in from spring to early summer.
- Harvest: Blooms mid to late spring; fruit ripens late summer to fall (about August to October) depending on cultivar.
Hardiness
USDA hardiness zones: 3–8
Temperature: down to -40°C
Troubleshooting
Most apple problems turn up on the leaves, the blossoms, or down inside the fruit, and a lot of it gets going in the cool, wet weather of spring. Once you can spot the early signs, you can jump in before a disease digs in for the whole season. Find the match below, then act while it still does some good.
Blossoms and shoot tips turn black and hook over like a shepherd's crook
This one's fire blight, a bacterium that tears through warm, wet bloom weather and leaves the shoots looking like they got torched. Cut out the infected wood 8 to 12 inches below where the damage shows, and swab your tools with disinfectant after each and every cut so you're not carrying the bacteria from branch to branch. And ease up on the nitrogen, because that soft, speedy growth is just what it likes to munch on.
Fix:
- Prune out infected wood at least 8 to 12 inches below visible symptoms.
- Disinfect pruning tools between every cut to avoid spreading the bacteria.
Velvety dark patches show up on leaves and fruit while the leaves drop too soon
What you're seeing is apple scab, a fungus that comes alive in cool, damp spring weather and travels up from leaves that fell last year. So clear out and toss every leaf under the tree come fall, thin things for better airflow, and put down a protectant fungicide right at bud break if spring turns wet. Want to skip most of the hassle? Pick a scab-resistant cultivar.
Fix:
- Rake and remove fallen leaves to reduce overwintering spores.
- Apply a labeled fungicide on a protectant schedule starting at bud break in wet springs.
Bright orange spots dot the leaves with strange little tubes on the back
That's cedar-apple rust, a fungus that has to bounce between two hosts, so it hops back and forth between your apple and any juniper or red cedar nearby. Take out those alternate juniper hosts wherever you can, and treat from pink bud through early fruit set in the spots that give you grief. Honestly, the easiest long game is to grow a rust-resistant cultivar and keep junipers a good distance off.
Fix:
- Remove nearby juniper or red cedar hosts where practical.
- Apply a labeled fungicide from pink bud through early fruit set in problem areas.
Wormy apples riddled with tunnels and crumbly brown frass inside
Say hello to the codling moth, whose larvae burrow right down to the core and leave you with that classic wormy apple. Hang up pheromone traps so you can catch the adults and line up your sprays with egg hatch, thin the fruit, and pick up every dropped or buggy apple so the next batch has nowhere to settle. On a small backyard tree, you can even bag the fruit one by one and that does the trick too.
Fix:
- Thin fruit and remove and destroy dropped or infested apples.
- Use pheromone traps to time labeled insecticide or kaolin sprays, or bag individual fruit.
Toxicity
Ripe apple flesh is a healthy snack for people and a fine treat for plenty of animals. The trouble is in the seeds, leaves, twigs, and bark, which carry cyanogenic compounds that let off cyanide once they're chewed. So keep prunings and wilted leaves away from pets and livestock, and don't let any animal pig out on whole apples or cores.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds
Safe for
People
Cats Caution
Cats don't usually go for the fruit, but the seeds, leaves, and bark let off cyanide as they break down. So stash your cores and prunings somewhere a nosy cat can't get a chew.
Dogs Caution
A nibble of ripe flesh is no problem, but the seeds, core, leaves, and bark are, because they give off cyanide. Don't let a dog work over a whole apple or the windfalls.
Horses Caution
Horses are big fans of a chunk of apple flesh, and a couple won't hurt. The risk is wilted leaves and a lot of seeds, so keep prunings and dropped fruit out of the paddock.
Rabbits Caution
A little bit of ripe flesh is a nice treat, but never the seeds, and keep them clear of the leaves and twigs too.
Livestock Moderate
For cattle, goats, and sheep, wilted apple leaves are the real worry, since they let off cyanide as they dry. Keep prunings and branches well out of the pasture.
Birds Caution
The flesh is fine to share, but apple seeds carry cyanide and birds react badly to even a little. Pick out every seed before you hand over a piece.
People Ripe fruit safe
Ripe apple flesh is a healthy snack, plain and simple. The seeds do hold a cyanide compound, but you'd have to crunch a whole handful for it to count, so just leave the cores alone.
The danger is the wilting leaves, stems, and chewed seeds (cyanide), not the flesh. Keep pets and livestock away from prunings and wilted leaves and do not let them chew large numbers of seeds; sliced ripe flesh with the core and seeds removed is a safe treat in moderation.
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
There are thousands of apple cultivars out there, but only a handful show up in most backyards and at most nurseries. These are the ones worth knowing by name, and don't forget you'll want two compatible varieties for pollination.
Honeycrisp
A cold-hardy crowd-pleaser prized for that big, juicy snap, even if it can be a bit temperamental to grow well and to keep.
Gala
An early-ripening, sweet and mild apple with red-and-yellow stripes that also works nicely as a dependable pollinizer for other trees.
Granny Smith
A firm, tart green apple that needs a long warm season, bakes wonderfully, and stays good for months.
Fuji
A dense, super-sweet apple that keeps for ages, though it wants a long growing season to ripen the whole way.
Red Delicious
Your classic deep-red, heart-shaped eating apple, mild in taste under a skin that's noticeably thick.
How to propagate
Since apples don't come true from seed, just about every tree worth eating from is grafted. So here's how the methods stack up and how long each one takes to put fruit in your hand.
GraftingModerate
Late winter to early spring while both scion and rootstock are dormant. · Bears fruit in roughly 2 to 4 years on dwarfing rootstock, longer on standard.
This is how you keep a named cultivar true to type, joining scion wood to a rootstock while both are still dormant in late winter or early spring. The rootstock decides how big the tree gets, how quickly it fruits, and how well it copes with your soil. Count on apples in roughly 2 to 4 years on dwarfing rootstock, with a longer wait if you go standard.
GraftingModerate
Late summer, when bark slips and buds are mature. · Bud grows out the following spring; fruiting follows in a few years.
Think of this as the nursery's efficient take on grafting, tucking a single ripe bud onto a rootstock in late summer once the bark peels away easily. The bud rests through winter, breaks out the following spring, and the young tree starts fruiting a few years on. Since it's just one bud per rootstock, it stretches hard-to-find scion wood a lot further than a full graft does.
SeedModerate
Cold-moist stratify seeds about 6 to 8 weeks, then sow in spring. · Several years to fruit, and not true to type.
Going the seed route means giving the seeds a cold, moist chill of about 6 to 8 weeks first, then sowing in spring. Those seedlings need several years to fruit and won't look like the apple they came from, so this path is really for raising rootstocks or breeding new varieties, not for copying one you already love.
Myths
Plant a seed from a tasty apple and the tree will grow that same apple.
Here's the thing: apples don't come true from seed. Every seedling shuffles up a brand-new mix of genes and usually gives you small, sour fruit that looks nothing like the apple it came from. Named cultivars are reproduced by grafting scion wood onto a rootstock, and that's the one way to hold the variety true.
A single apple tree will reliably set a full crop on its own.
Not so much. Most apple cultivars are self-unfruitful, meaning they can't pollinate their own flowers. You usually need a second, compatible variety nearby that's in bloom at the same time, or a crabapple close at hand, before the tree gives you a real crop.