Privet a problem is a statement that holds true for several species in the Ligustrum genus. These plants are classified as invasive in many parts of the world. They produce millions of seeds that birds spread far from the parent plant. Those seeds sprout into dense thickets that choke out native plants and take over woodlands.
I saw this problem up close on an abandoned lot near my old house. What started as a neat garden hedge had escaped into the woods behind the property. The privet formed a wall of growth so thick that nothing else could grow under it. Native wildflowers, young trees, and ground cover plants had all been smothered by the time I walked through that area.
The science backs up what you see on the ground. Research by Fernandez and team in 2020 found that glossy privet produces between 100,000 and 10,000,000 seeds per tree. Those seeds have a germination rate of 70% to 95%, which means almost every seed that lands in good soil will sprout. Forests invaded by privet lose 40% to 52% of their climbing plant species. That privet environmental damage ripples through the food web in those forests.
Not all privet types cause the same level of harm. Three invasive privet species cause the most harm: Chinese, glossy, and Japanese privet. Chinese privet is listed as a noxious weed in Florida. European privet is banned from sale in Ohio. Glossy privet is illegal to plant in New Zealand and in Queensland, Australia. Your state may have its own rules, so check your local weed lists before you buy.
Worst Offenders to Avoid
- Chinese privet: Spreads through forests across the southeastern US and ranks as one of the worst invasive shrubs in the region.
- Glossy privet: Produces massive seed crops that birds carry into wild areas where the plants form dense stands.
- Japanese privet: Escapes gardens in Zones 7 through 10 and crowds out native plants along forest edges.
Safer Alternatives to Plant
- Golden Ticket privet: A sterile cultivar that produces no fruit, so it can't spread seeds into the wild at all.
- Sunshine Ligustrum: A compact yellow-leaf variety that makes very few seeds and stays well behaved in your yard.
- Native options: Consider native hollies, wax myrtles, or viburnums that give you a dense hedge without the invasion risk.
Steps to Remove Invasive Privet
- Cut and treat: Cut stems to the ground and paint the stumps with a 20% glyphosate solution right away to stop regrowth.
- Pull seedlings: Young privet plants pull out by hand when the soil is moist after a good rain.
- Follow up: Check the area every few months for new sprouts since the seed bank in the soil can produce new plants for several years.
In my experience, the best thing you can do as a gardener is pick your privet with care. If you love privet hedges, avoid making privet a problem in your area. Pick a sterile cultivar like Golden Ticket that won't spread seeds. You still get the dense green wall you want without adding to the invasive privet species problem in your area.
If you already have an invasive privet on your land, think about removing it over time. Cut it back hard and treat the stumps so it doesn't grow again. Replace it with a sterile cultivar or a native plant that gives you the same screening effect. Your local extension office can help you pick the best swap for your zone.
The privet environmental damage is real and well studied. But you don't have to give up on privet hedges for good. Choose the right variety, check your state laws, and keep your hedge trimmed so it makes fewer berries. With a bit of planning you can enjoy privet without adding to the problem that has harmed native forests across the country.
Read the full article: Privet Hedge: 8 Best Varieties and Care Guide
