Japanese Beetle-PROOF Plants!

By Dave Zeldon and Ely Schweyer

In late June and early July we will be witnessing the annual invasion of the Japanese Beetle on many of our favourite landscape plantings including Hollyhocks, Dahlias, Hibiscus, Roses, Grapes, and Raspberries.

   Adult beetles skeletonize foliage.

   Many of us have tried the various means available to curb this yearly destruction like pheromone traps, Nematode lawn inoculation, hand picking, and concoctive sprays. But still, we get substantive damage.

   Interestingly enough, some plants such as Geranium, Castor Bean, and the flowers of Bottlebrush Buckeye, will cause paralysis and death of these beetles when eaten.

Maybe it’s Time We Look at Whole New Approach

Why not slowly invest in a landscape makeover? One with Japanese Beetle resistant plants!

   Trees such as Red Maple, Red Oak, Hickory, and Redbud could replace the susceptible Japanese Maple, Norway Maple, Pin Oak, Linden, and Mountain Ash.

   Why not consider growing more Evergreens such as Holly, Yew, Boxwood, and Aborvitae instead of the prone Virginia Creeper, Apple and Plum family of trees, and Birches.

   You also may want to contemplate planting perennials such as Coral-Bells, Hostas, Pachysandra, Sedum and Foxglove as opposed to the Japanese Beetle standard menu fare of Evening Primrose, Hydrangea, Clematis, Potentilla, and Zinnia.

   Yes, we do have some preventative measures at our disposal to battle the Japanese Beetle (find how to use beneficial nematodes in our fall chore blog) but due to the nature of this pest, it will inevitably win the war. If we continue to grow the some 400+ preferred host plants in our landscape, providing an adequate food source for this invasive pest rather than replacing them with resistant species, surely this pest will make gardening a chore instead of the pleasure it should be.

We hope this article will aid in the prevention of Japanese Beetles in your garden space! For more information – and Japanese Beetle resistant plants – visit Eising Greenhouse and Garden Centre! 🪲