Perennials that begin with the letter "M" in the wild include the Mayflower, the state flower of Massachusetts. Meadow beauties can dominate a landscape with their flowers and milkweed is a familiar weed, growing year after year in stands across the countryside in America. There are three perennials that begin with "M" that you can enjoy in your own backyard.
Meadow rue is a perennial shrub that would make a fine addition to your wildflower garden or go well along the borders of any woods on your property. It comes from the buttercup family of plants and is best suited for cooler climates, with many types unable to handle the heat and humidity found in the Deep South. Meadow rue species are almost all non-native, with some coming from Japan, others from Africa and many from Europe. They prefer well-drained and damp soil to grow in and do best when you plant them in the shade. Their height can vary, with some as small as the Kyoshu meadow rue, which rarely exceeds 6 inches and some as tall as the 8-foot high Lavender Mist meadow rue. The taller of the meadow rues may require you to support them with stakes if you put them in an area all by themselves.
Musk mallow is a European plant that grows wild across most of the Eastern United States and in parts of the west. Musk mallow is a naturalized perennial in many older gardens, and you can grow it with few problems if you put it in light shade. It originally came over to North America as an ornamental perennial for gardens. It is one of many plants that "escaped" into the wild, taking hold and spreading across the landscape. It can tolerate extreme cold in the winter while it is dormant and produces 2-inch wide five-petaled flowers that can be white, pink or lavender. Musk mallow will flower from June to October depending on where you live. Musk mallow gets its name from the fact that if you bruise any portion of the plant you will immediately notice a musky odor.
The monkey flower is a perennial flowering plant that in some climates may be an annual. Most species in the wild exist in the West, with a majority of those in California. The flower takes its name from its shape and color pattern, which gives it a resemblance to a grinning monkey. Monkey flowers bloom in late spring and into the summer in a wide variety of shades. The leaves may be sticky in some species. Their growing conditions change from species to species depending on the type of monkey flower you desire to grow in your garden. Some need full sun while others crave the shade. Some need lots of water while others tolerate dry soil exceptionally well.