When choosing ground cover plants, there are a few factors ... Sweet woodruff is also very low maintenance and non-invasive, with lightweight roots that are easy to dig up and divide.

Invasive plants are introduced non-native species that rapidly get out ... Although they produce many strong, thick roots, ...

For example, English ivy, which is non-native to Washington, is one type of plant that is legally allowed to be sold in the state despite being considered invasive, Schuster said. People can buy ...

AMAMI, Kagoshima Prefecture--This southern Japan city is torn between its responsibility to protect a UNESCO World Natural Heritage site and residents’ desire to keep non-native trees.