• Plants that return to flower every year are known as perennials. Perennials live for more than two years, but most common perennials grown in gardens live for longer than that. Perennials that grow with woody stems, like trees, can live for over 4,000 years. Perennials are plants that re-grow each year from root matter, such as bulbs and tubers, left behind when the plants die off, as opposed to those that return from their own seeding. Garden perennials typically bloom in spring and summer and die away in the fall and winter. Plants that are perennial in their native environments may be grown in harsher climates and treated as annuals, re-grown each year from cuttings or seedlings.
  
  

Cranesbill Geranium

• This plant bears clusters of delicate pink flowers from April onward. It grows in bushy clusters to a height of about 18 to 23 inches and spreading about 20 inches. It is commonly planted in borders, where it is often used to define edges, and in containers. The plant is relatively easy to care for, liking full sunlight to partial shade and soil that can be anything from slightly acidic to slightly alkaline. If the plants are trimmed back immediately after they have bloomed, it is possible to get a second summer blooming. They can be divided in early spring or in the fall.
  
  

Grape Hyacinth

• The Grape Hyacinth is a plant of the Muscari family. The blooms emerge in clusters of small bell-shaped flowers from April onward. These clusters resemble grapes on the vine, which gives the plant its common name. The plant name, Muscari, points to the aromatic fragrance given off by the flowers. The plants grow to between 4 and 8 inches in height, and its bulbs should be planted three inches deep. The bulbs are hardy enough to survive harsh winters but should be planted in well-drained soil. These plants will spread and make for striking areas of ground cover when in bloom.
  
  

Tazetta Daffodil

• Tazetta Daffodils thrive as perennials in warmer climates, such as the deep south of the United States. The plants flower in bunches, and each stem produces a minimum of three or four flowers, but it is common to see bunches of fifteen or more. The flowers themselves are fragrant and consist of a central cup surrounded by petals. Tazetta Daffodils have cups and petals of different colors, white or yellow petals combined with cups of orange, yellow, or red. The plants grow to between 6 and 18 inches in height, and bulbs should be planted to a depth of 6 inches.