{"id":5470,"date":"2025-12-10T18:33:16","date_gmt":"2025-12-11T02:33:16","guid":{"rendered":"https:\/\/wrwofficial.com\/index.php\/2025\/12\/10\/japanese-beetle-resistant-roses-for-your-garden\/"},"modified":"2025-12-10T18:33:18","modified_gmt":"2025-12-11T02:33:18","slug":"japanese-beetle-resistant-roses-for-your-garden","status":"publish","type":"post","link":"https:\/\/wrwofficial.com\/index.php\/2025\/12\/10\/japanese-beetle-resistant-roses-for-your-garden\/","title":{"rendered":"Japanese Beetle\u2013Resistant Roses for Your Garden"},"content":{"rendered":"

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Growing roses in the Rocky Mountain region has never been easy. We gardeners are familiar with the periods of drought, sudden cold snaps, and dry winters that zap rose vigor and leave plants resprouting from their bases. Many of us have shifted to shopping for own-root (rather than grafted) plants whenever possible; have taken up winter watering\u2014dragging hoses to and fro as if participating in some sort of monthly, slow-motion ritual; and modified our pruning practices to account for greater and later cold damage. Often, I don\u2019t prune substantially until mid to late May, to avoid encouraging plants to break dormancy or opening their vasculature in the event of a late hard freeze.<\/p>\n

Still, we\u2019ve been blessed, until recently, to have enjoyed gardens free of Japanese beetles, which prefer roses above almost all other plants (of which they eat a dizzying spread in the first place). Since their arrival in Denver over 10 years ago and Fort Collins more recently, growing tidy-looking roses has become even more difficult. And, because they are gradually spreading west, other vicinities in the Rocky Mountain region will soon have to tackle this challenge head-on.<\/p>\n

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The best way to manage Japanese beetles is often handpicking them off plants, but there are other methods to reduce their impact on your garden. Photo: Michelle Provaznik<\/em><\/figcaption><\/figure>\n

It\u2019s worth noting that this piece won\u2019t cover Japanese beetle management by active control measures; it will focus on plant selection as a means of minimizing beetle damage in the rose garden. For general information on Japanese beetles and an introduction to their management, check out this resource from CSU Extension: Japanese Beetle.<\/a><\/p>\n

Learn more:<\/strong> How to Get Rid of Japanese Beetles<\/a><\/p>\n

Early Flowering Roses Get a Jump on the Competition<\/h2>\n

Roses that bloom prior to the emergence of adult Japanese beetles are among those least bothered by their presence in regional gardens. These would include many species roses (the original genetic building blocks for much of the roses we cultivate in gardens today) as well as several old garden roses (sometimes referred to as OGRs). Old garden roses emerged less through active breeding programs and more through observation and selection of superior roses in cultivation prior to the year 1867, which, not by coincidence, is the year the first hybrid tea rose was introduced.<\/p>\n

These older roses, in many cases, also benefit from greater innate tolerance for extreme weather than newer rose groups and tend to be especially vigorous. In some native roses, like thornless wild rose (Rosa<\/a> blanda<\/em>, Zones 3\u20137) and Woods\u2019 rose (Rosa woodsii<\/em>, Zones 3\u20138), which some now lump with blanda, suckering can be extensive. These plants are best kept to the back forty. Most others in this early flowering group don\u2019t sucker, or sucker modestly, developing into what looks like a shrub. Regardless of their habit, many roses in this group make superb wildlife plants, providing good cover thanks to their dense and thorny stems, plentiful foliage, and hips. Below is a list of suggested species and OGR roses for \u201cbeating the beetle\u201d; these plants will complete most of their bloom before adult beetles emerge or after they die off for the year, and so are less susceptible to beetle feeding.<\/p>\n

\"thornless<\/a>
The thornless wild rose, also known as the smooth rose, is an early bloomer that is native to the Northeastern United States and Upper Midwest and can be somewhat aggressive given the correct conditions. Photo: Krzysztof Ziarnek, CC BY-SA 4.0<\/a>, via Wikimedia Commons<\/em><\/figcaption><\/figure>\n

Thornless wild rose and Woods\u2019 rose<\/h3>\n

Rosa blanda<\/em> and Rosa woodsii<\/em><\/strong><\/p>\n