Q: Is there a way to tell the difference between male and female gingko seedlings, before they're big enough to start producing that stinky fruit?
Thanks, Kitty
Unfortunately, there's no tried and true method for determining a female from a male ginkgo until it reaches flowering and fruiting age, which is usually around 20 years.
Nurseries propagate ginkgos by grafting a known male onto a seedling rootstock, thus you're pretty assured of a
male if you purchase from a reputable source.
If you grow a ginkgo from a seed, you take the chance of finding out about 20 years later that you may have a female. If you plant it far enough from frequently-visited areas, the smelly fruit may not be a problem (unless you're downwind of it!).
I recommend purchasing a known male sapling from a nursery or garden center. You'll be much happier (and your olfactory glands will be, too).