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Horticultural invasives, such as butterfly bush, English ivy, pampas grass and many other garden favorites that have escaped cultivation, are of increasing concern.

A: There’s a reason English ivy is on the invasive plant list.

The cemetery stopped planting English ivy and wintercreeper, two common invasive species, and began replacing it with native ground covers.

Here grow maple, oak, hickory, cottonwood, sycamore, river birch, hackberry, fronds bowed under climbing English ivy, with winter creeper spreading underfoot.

Non-natives — think Himalayan blackberry and English ivy as examples — have an unfair advantage.