Ginkgo Foul-Smelling Fruit: Why It Happens and What to Do
That notorious rotten, vomit-like stench under a ginkgo in fall comes from the fleshy seed coat of a female tree's dropped fruit. It's the single biggest complaint about the species — and entirely avoidable with the right tree. Here's why it happens and how to deal with it.
You have a female (seed-bearing) tree
What's happening
Ginkgos are dioecious — individual trees are male or female. Only females produce the plum-like seeds whose soft outer flesh contains butyric and butanoic acids, the same compounds behind rancid butter and body odor. As the fruit ripens and drops, it smells appalling and gets tracked everywhere underfoot.
How to confirm
In fall the tree drops soft, tan-to-orange, cherry-sized 'fruits' that reek when crushed. Males produce only small pollen catkins in spring and never fruit. A tree must be roughly 20+ years old before it fruits, so younger seedlings reveal their sex only with time.
How to fix it
You can't convert a female to a male. If the tree is young and small, the cleanest solution is to replace it with a named male cultivar. For a mature tree you want to keep, manage the drop (below) or have an arborist apply a fruit-inhibiting spray at flowering — timing is fussy and results vary.
Prevent it
Always buy a named, grafted male cultivar — 'Autumn Gold', 'Princeton Sentry', 'Magyar', or 'Saratoga' — rather than an unsexed seedling, which guarantees a fruitless tree.
Fallen fruit left to rot and spread
What's happening
Even on a female tree, much of the misery comes from ripe fruit sitting on the ground, getting crushed, and being walked into the house. The smell intensifies as the flesh breaks down over the weeks of drop.
How to confirm
The odor is worst on warm days and around walkways, and you can see smashed, browning fruit pulp on paths, decks, and shoe soles.
How to fix it
Rake or sweep up fallen fruit promptly and often during the few weeks of drop, wearing gloves since the flesh can irritate skin. Bag and dispose of it rather than composting near living areas. A tarp laid under the canopy makes collection far quicker.
Prevent it
Keep up a regular fall cleanup schedule during fruit drop, and route foot traffic away from under the canopy while fruit is falling.
A female planted too close to living spaces
What's happening
A fruiting ginkgo overhanging a patio, driveway, entry walk, or pool turns a manageable nuisance into a seasonal ordeal, because every dropped seed lands where people walk and the smell is unavoidable.
How to confirm
The tree is female and its canopy extends over a frequently used hard surface or doorway where you can't escape the autumn drop.
How to fix it
If the tree is otherwise valued, your realistic options are diligent cleanup, an arborist-applied fruit-control spray, or — for a small tree — relocation. For a large female in a bad spot, removal and replacement with a male cultivar is often the lasting answer.
Prevent it
Site any ginkgo well away from patios, walks, and drives, and choose a male cultivar so the question never arises.
When to worry (and when not to)
Smelly fruit is a nuisance, not a health threat to the tree — a fruiting ginkgo is simply a mature female doing exactly what it's built to do. There's nothing wrong horticulturally, so the 'fix' is about your tolerance for the mess. One pet-safety note worth knowing: the ASPCA reports that the seed of the female ginkgo contains ginkgotoxin and is toxic to dogs and cats, so it's worth clearing dropped fruit promptly where pets roam (male trees, which never fruit, are listed as non-toxic). The real lesson is preventive: because trees don't reveal their sex for two decades, always start with a named male cultivar so you never inherit the problem. If you've already got an established female you love, commit to seasonal cleanup or talk to a certified arborist about fruit-suppression timing.