Most of the species spread aggressively by underground rhizomes.

Tumors that do not spread aggressively are called benign.

Just make sure you can mow around it because it spreads aggressively.

They are weeds, she told me, that would spread aggressively and overwhelm my cultivated garden.

But be warned, this particular viola is true to the violet nature and spreads aggressively.

A young man stood there on the far side, legs spread aggressively, arms loose at his sides.

Though it does spread aggressively, they can easily be kept under control by pulling up unwanted plants.

This species is also sometimes cultivated, but must be kept in a site where positive control is possible, as it spreads aggressively.

In the garden, this plant spreads aggressively by both stoloniferous stems and seed.

He squinted at the boots, spread aggressively beyond his nose.