- Sedum is a hardy choice for rock gardens.sedum image by Alison Bowden from Fotolia.com
Rock gardens are often planted on a natural slope that has existing rocks, according to Colorado State University. They can also be created from scratch. Naturalizing plants, and low-mounding or spreading plants are used in rock gardens for the way they cascade over the rocks. Perennials are desirable because they return year after year. Flowers that do well in rocky or poor soils are also a good choice for most rock gardens. - Sedums are a great choice for rock gardens, according to Colorado State University. These plants, often called Hen and Chicks, come in a variety of shapes, sizes and colors. Many form thick, lush mats. Others are tall. Sedum album is a species with distinctive bronze foliage and white flowers. Sedum hybridum has bright yellow flowers and is sometimes called Stonecrop.
- Woolly Yarrow is the choice for those rock gardens true to their name, with gritty, pebbly soil. This plant, which mounds to about 6 inches, features fern-like leaves and yellow flowers. It is a good choice between paving stones and blooms from June to September, according to Washington State University.
- This spreading groundcover is desirable for its bright purple or blue flowers, and that it grows in full shade. The plant grows to between 4 and 10 inches tall and prefers well-drained soil. It blooms in the spring.
- Creeping Baby's Breath grows to a height of between 4 and 8 inches. This plant prefers full sunlight and comes in varieties of white and pink shades. Creeping Baby's Breath forms a lush, thick mat of green that blooms in early summer.
- Persian Candytuft has distinctive, blue-green foliage and spikes bright-pink flowers that look like candy. This plant likes full sun and will cascade. It is sometimes planted atop rocks or even rock walls to take advantage of the trailing habit. The flowers can grow to 6 inches tall.
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