Invasives to Avoid This Summer and What to Plant Instead

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Did you know warmer temperatures can speed up biological processes, leading to rapid growth in plants and animals alike? This explains why your garden seems to explode with growth during the summer months. However, it’s crucial to distinguish between plants that simply grow quickly and those that actively harm their environment.

Passion Flower

Replace the invasive Chinese Wisteria with Passionflower.

The term “invasive” has historically been used to describe fast-growing species or non-native species; however, if something is fast-growing and non-native, it does not necessarily mean it is invasive. To truly be invasive, the species must be harming the native species in that ecosystem. For example, Chinese Wisteria is an epiphytic or climbing invasive species that outcompetes native species by covering its host plant and preventing the host plant’s leaves from receiving sunlight, which is necessary for plant growth.If you have Chinese Wisteria growing in your yard, try replacing it with Maypop, a native passion flower with a tropical appearance. It has the same, if not more enticing, deep purple coloration, an exotic floral display, and provides food for songbirds and mammals.

Wax Myrtle in Full Form By JimRobbins

Wax Myrtle in Full Form By Jim Robbins

If you are in the market for a shrub to add to your landscape, avoid planting Thorny Olive (Elaeagnus pungens) as it is an invasive species that not only aggressively colonizes areas, but forms dense thickets that shade out and outcompete native vegetation. This reduces plant diversity and alters habitat structure. You may think, “I am just planting this in my yard and I will keep it maintained and in control.” However, it is important to remember that these are flowering and fruiting species and the fruits of these plants contain seeds that wildlife will consume and disperse along their travels. Your landscaping choices can significantly impact surrounding natural areas. Rather than a shrub like Thorny Olive, try a Wax Myrtle or Yaupon Holly. Both species can provide a dense border for your lawn and serve as food sources and shelter for birds and other wildlife.

If you have any invasive species in your landscape, consider removing them by cutting them down and digging up their roots. Herbicides, like Glyphosate, are only recommended in extreme cases where it may not be possible to mechanically remove the plant. Especially if applied improperly, herbicides can impact surrounding plants and contaminate soil and groundwater.

Remember, if you are describing a fast-growing plant, try using the words “prolific” or “vigorous” instead, and if a plant isn’t from around here, then it’s just plain “non-native.” Reserve the term invasive for species that truly harm the native species they surround themselves with.

The N.C. Cooperative Extension Center for New Hanover County is located at the Arboretum, 6206 Oleander Drive. The gardens are free and open daily from 8 a.m. to 5 p.m. Reach Gabriella at gadesouz@ncsu.edu or 910-798-7660.