General types

• Broad categories of nasturtiums include semi-trailing, single flower climbing and dwarf, according to the University of Vermont Extension. Semi-trailing varieties can hang more than two feet from containers. Single flowering climbing nasturtiums creep up latticework with tough vines, and their multi-hued flowers produce a strong fragrance. As for the dwarfs, these grow into compressed bushes.
  
  

T. majus

• A popular nasturtium species, Tropaeolum majus comes in many varieties. One is the Alaska, which is an heirloom with yellow, orange and red flowers, according to the University of Arkansas Cooperative Extension Service. Its leaves are spotted with white and cream. Another Tropaeolum majus variety is Empress of India, a traditional annual that grows up to a foot and produces bright red flowers, according to Planet Natural. Other types of this species have dessert names. These include strawberry ice -- with yellow and red flowers -- and the creamy-maroon blooming peach Melbas.
  
  

T. speciosum

• Also called "flame thrower" or "flame flower," this species produces flowers the color of fire toward the end of summer and beginning of fall, according to the BBC Plant Finder. Green foliage with five lobes covers its stringy stems, and, below the dirt, the plant forms big tubers. Growing them can be a challenge, although "fine Gardening" reports they can be planted in a variety of ways, including along the edges of gardens or hanging from containers. Flame throwers thrive in part shade to full sun.
  
  

T. peregrinum

• The popular canary creeper is a climber with yellow leaves that resemble bird wings, according to "fine Gardening." It blossoms in summer and fall and can be either an annual or perennial. The plant also grows in clumps, attracts butterflies and can climb up to four yards. The BBC recommends planting this less-than-hardy species in soil that drains well -- and letting it twine into another plant.