A cherry pit is not exactly a seed. It is a seed wrapped in a hard, woody shell that the fruit itself builds, and the true seed is a small, almond-like kernel hidden inside.1USDA Forest Service Agricultural Handbook. Rosaceae — Rose family: Prunus L. — cherry, peach, and plum That makes the pit two things at once, a shell and a seed, and they behave very differently in your body and in your garden.
What a Cherry Pit Actually Is
Cherries are drupes, or stone fruits: a thin skin, a fleshy middle you eat, and a hard inner layer around a single seed.2Piedmont Master Gardeners. Are Cherry Pits Seeds? The Science Inside That hard inner layer is part of the fruit, not part of the seed.3Piedmont Master Gardeners. Are Cherry Pits Seeds? The Science Inside Crack the shell open and the small pale kernel inside is the actual seed.4USDA Forest Service Agricultural Handbook. Rosaceae — Rose family: Prunus L. — cherry, peach, and plum Peaches, plums, apricots and almonds are built the same way.5PubMed Central. Evolution of the fruit endocarp: molecular mechanisms underlying adaptations in seed protection and dispersal strategies In almonds the flesh stays thin and leathery, and the “nut” we eat is the seed from inside the stone.6USDA Forest Service Agricultural Handbook. Rosaceae — Rose family: Prunus L. — cherry, peach, and plum
You can meet the layers in order the next time you eat a cherry. First comes the glossy skin, then the juicy flesh, then the hard stone your teeth stop against. Rinse a pit and you will feel a slightly rough, ridged surface, the leftover mark of where flesh was attached. Some new varieties have stones about half the size of older ones, which means more flesh per cherry.
To see the seed yourself, use a nutcracker, or tap the pit gently with a hammer on a towel, because the shell is very hard. Inside is a small, teardrop-shaped kernel with a thin brown skin. Don’t eat it; the safety section explains why.
Apples and pears work differently. They keep their seeds loose in a papery core rather than in a woody stone.7Piedmont Master Gardeners. Are Cherry Pits Seeds? The Science Inside A true nut is a dry fruit whose single seed sits in a hard shell that usually doesn’t split open.8Piedmont Master Gardeners. Are Cherry Pits Seeds? The Science Inside A cherry pit looks like a tiny nut, but it comes from a fleshy fruit, which makes it a different thing. In everyday speech, anything you plant is a seed, and gardeners often plant the whole pit, shell and all.
How the Shell Turns Hard
The stone begins as soft tissue whose cells later pack their walls with cellulose and lignin.9PubMed Central. Mechanism of Stone (Hardened Endocarp) Formation in Fruits: An Attempt toward Pitless Fruits, and Its Advantages and Disadvantages Lignin is the stiff material that gives wood its strength. As these cells harden, they die and leave behind a rigid shell.10PubMed Central. Mechanism of Stone (Hardened Endocarp) Formation in Fruits: An Attempt toward Pitless Fruits, and Its Advantages and Disadvantages
On the tree, this shows up as a pause. Young cherries grow quickly at first, then seem to stall for a couple of weeks.11PubMed Central. Integrative genetic and hormonal coordination of endocarp/stone development in drupe fruit The pause likely happens because building the shell takes so much of the fruit’s energy.12PubMed Central. Integrative genetic and hormonal coordination of endocarp/stone development in drupe fruit Afterward the fruit swells quickly and colours up, so the shell is finished before the cherry is ripe.
The hard shell shields the seed from disease and from animals that would eat it. Birds and other animals swallow or drop the fruit and carry the protected seed away. Later, rain, frost and soil slowly crack the shell so the seed can sprout.
Are Cherry Pits Poisonous
The seed inside the pit contains amygdalin, a natural compound that can turn into cyanide.13Discover Toxicology. Forensic toxicology perspective on cyanide poisoning originating from natural seeds Cherry seeds, like apricot kernels and bitter almonds, can generate hydrogen cyanide during digestion.14Discover Toxicology. Forensic toxicology perspective on cyanide poisoning originating from natural seeds But the cyanide is only released when the seed’s cells are broken open.15PubMed. Dynamics of cyanogenic glycosides in apple and plum fruits, products, and byproducts: A concise review
That is why a swallowed pit and a chewed pit differ so much. Swallowed whole, the shell works like a sealed container, keeping the seed’s compound away from digestive juices as it travels through. Chewing breaks both the shell and the cells of the seed, which lets amygdalin meet the enzymes that turn it into cyanide. That contact is the real danger step.
Small accidental swallows of intact pits generally cause no harm.16Poison Control. Are cherry pits really poisonous? An intact pit passes through the gut and comes out in the stool.17Missouri Poison Center. Cherry Pits Crushing or chewing pits before swallowing can release cyanide.18Poison Control. Are cherry pits really poisonous? The idea that one swallowed pit can poison you is a myth; if you swallowed one or two whole pits, there’s usually nothing to do.
If someone chewed or crushed several pits, call a poison center. Give them the number of pits, whether they were crushed or chewed, and the person’s age, because the risk depends on how much seed was broken up and how small the person is. Don’t wait for symptoms.
For small children, the bigger everyday risk is choking, not poison. Pit cherries or cut them up for toddlers.
Blending cherries with their pits crushes the seeds, which is exactly what releases cyanide, so always pit cherries before blending or juicing. Cherry pit “teas” or kernel snacks aren’t a safe idea either.
Can You Grow a Cherry Tree From a Pit
You can, but pits need preparation. Freshly cleaned sweet cherry seeds planted straight away often won’t sprout at all.19The Journal of Horticultural Science and Biotechnology. Seed washing, exogenous application of gibberellic acid, and cold stratification enhance the germination of sweet cherry (Prunus avium L.) seed Soaking and washing the seed for a day raised sprouting to about 1 in 4.20The Journal of Horticultural Science and Biotechnology. Seed washing, exogenous application of gibberellic acid, and cold stratification enhance the germination of sweet cherry (Prunus avium L.) seed A cold spell of 6 to 8 weeks, called cold stratification, improves sprouting further.21The Journal of Horticultural Science and Biotechnology. Seed washing, exogenous application of gibberellic acid, and cold stratification enhance the germination of sweet cherry (Prunus avium L.) seed With washing, a growth hormone treatment and 6 weeks of cold, about 6 in 10 seeds sprouted.22The Journal of Horticultural Science and Biotechnology. Seed washing, exogenous application of gibberellic acid, and cold stratification enhance the germination of sweet cherry (Prunus avium L.) seed Even with good care, expect to plant several pits to get one seedling.
A cherry seed is built to wait: dormancy stops it from sprouting right after the fruit falls, before winter. Leftover fruit can also rot or grow mould around the pit, which is why cleaning comes first.
A cold spell in the fridge imitates a winter, telling the seed the cold season has passed and it is safe to grow. In nature the pit lies in cold, damp soil over winter. The damp matters, because a dried-out seed cannot complete the process.
For a home method, clean off all the flesh and soak the pits in water for a day. Wrap them in a damp paper towel inside a sealed bag and refrigerate for about 8 weeks. Check monthly for mould and keep the towel slightly moist. Then plant in pots in spring, about 2 centimetres deep.
Where the pit comes from counts too. Supermarket cherries may have been chilled hard, which can harm the seed, while pits from a backyard or local tree often sprout better.
Once a pit sprouts, it begins as a small shoot and needs a pot with drainage and plenty of light to grow into a sturdy young plant. A tree grown from seed takes several years before it flowers and fruits, so this is a long-term project, not a quick way to get cherries.
Your seedling also won’t be the same cherry you ate. Most sweet cherry trees can’t pollinate themselves and need pollen from another tree.23Nature (Heredity). Contemporary pollen flow, characterization of the maternal ecological neighbourhood and mating patterns in wild cherry (Prunus avium L.) Most pollen comes from trees within about 100 meters of the mother tree.24Nature (Heredity). Contemporary pollen flow, characterization of the maternal ecological neighbourhood and mating patterns in wild cherry (Prunus avium L.) A seed’s “father” is another tree, so its fruit may taste quite different from the cherry you ate.
Other Uses for Cherry Pits
Cloth bags of cherry pits heated in the oven or microwave are a traditional European remedy for aches.25Baudelaire. What Are Cherry Stones? In a trial with people with fibromyalgia, though, a pit pillow eased pain less than a standard hot pack.26PubMed Central. Hot pack therapy versus cherry seed pillow in fibromyalgia patients: a prospective randomized controlled trial The pits heat quickly but don’t hold warmth as long.27PubMed Central. Hot pack therapy versus cherry seed pillow in fibromyalgia patients: a prospective randomized controlled trial
To make one, boil and dry the pits thoroughly to remove all fruit residue, then sew them into a cotton bag. Heat it briefly and test the temperature before placing it on skin. Intact dried shells keep the seed sealed during heating, and the risk rises if the pits are cracked or broken, so replace a bag if the pits are splitting or if it begins to smell of almond.
Oil pressed from cherry seeds is used in foods and cosmetics.28PubMed Central. Isolation of Cherry Seed Oil Using Conventional Techniques and Supercritical Fluid Extraction Pits left over from cherry processing can be turned into antioxidant extracts.29Chemical Engineering Transactions. Creating Incremental Revenue from Industrial Cherry Wastes The kernel of one cherry, mahlab, is ground as a spice in Middle Eastern baking.30PubMed Central. Profiling of Primary Metabolites and Volatile Determinants in Mahlab Cherry (Prunus mahaleb L.) Seeds in the Context of Its Different Varieties and Roasting as Analyzed Using Chemometric Tools Plains Indigenous peoples crushed whole wild chokecherries into dried patties for sauce.31Forager Chef. Are Cherry Pits Seeds? The Science Inside These commercial and traditional products are processed or used in small amounts, unlike chewing raw pits at home.