If you have boggy or swampy portions in your garden that you want to dry naturally, consider planting moisture-loving ground covers. Ground covers spread horizontally, rather than vertically, as they grow. To determine how many plants you need to cover the designated spot, calculate the plant's spreading distance at maturity, usually three years, and place each plant that measurement from the one next to it. Most ground covers are low-maintenance and hardy; installing them in your yard can reduce weeding and mowing.
While searching for the perfect moisture-loving ground cover, consider the beauty and adaptability of the plant to your garden's overall theme. For example, the plant houttuynia cordata chameleon, commonly called the "chameleon" plant, is a multi-colored moisture lover that adds three seasons of interest to your landscape. Its tri-colored leaves add a decorative accent to any garden, and it is both insect- and disease-resistant.
Brunnera macrophylla, more commonly called "heartleaf brunera," makes a good choice for a moisture-loving ground cover. It has heart-shaped, fuzzy-looking leaves, and in the spring, its blooms have a baby blue color. This plant, which spreads rapidly and is under 12 inches in height, also self-seeds.
Planting euonymus fortunei, better known as "dart's blanket," is key to turning a too-moist patch of your landscape into a wetland garden. The additional advantage of this evergreen shrub is that is salt-tolerant, a bonus if you live close to an ocean. Its summertime green leaves turn reddish-purple in the autumn, and it grows well in wetter areas and spreads rapidly.
In selecting the ground cover for a moist area of your garden, consider the hardiness of the plant, its full-growth size, blooming time and appearance, the same considerations that govern selection of plants in any other part of your landscape. For a ground cover, however, you must also consider its spreading tendencies and rate of growth in your area's plant hardiness zone.