Learning how to grow the marsh mallow plant in your garden is relatively straightforward, and this tough perennial is ...

However, some perennials are considered invasive, with aggressive growth habits helping particular species to outcompete ...

Ideally, perennials should be lifted, divided and replanted every three to five years. You'll be rewarded with healthy, vigorous growth and a crop of new plants. Plants should be divided when they ...

Trimming plants down to about six or eight inches can promote healthy growth in the ... and catmint. Perennials that are flourishing in your garden can remain tall. The foliage and stem system ...