In 1930, Percy Cane founded and began to edit the quarterly journal, Garden Design. His landscape designs included Dartington Hall at Totnes, Falkland Palace in Fife, Hascombe Court at Godalming, Hungerdown House at Seagry and many other places including the palace grounds at Addis Ababa, Ethiopia.

British government counsel to China (1867) who, on a trip to Korea in 1883, collected a specimen of Viburnum carlessii (Koreanspice Viburnum) which was then introduced into the West.

Agricultural chemist, Carver discovered three hundred uses for peanuts and hundreds more uses for soybeans, pecans and sweet potatoes. He pursued his education at Iowa Agricultural College (now Iowa State University), where he earned a Bachelor of Science degree in 1894 and a Master of Science degree in bacterial botany and agriculture in 1897. Carver became a member of the faculty of the Iowa State College of Agriculture and Mechanics (the first black faculty member for Iowa State College).

British naturalist who visited America twice and is credited with first identifying the flowering dogwood, Cornus florida.  He is credited with introducing Stewartia to England and has several plants named after him including Trillium catesbyi and Sarracenia x catesbyi.

The term "Cattleya" has long been associated with one of the more popular genera of orchids. That genus was named after Sir William Cattley who was a prominent British merchant and horticulturist. He was heavily involved as a plant collector and financer of plant collection expeditions by others.

For nearly half a century in the early 1800's Chapman roamed what is now the Midwest of the United States establishing nurseries for fruit trees. He would find a good growing spot and clear away the brush and plant apple seeds in rows. Some of the nurseries were small while others were several acres in size. When settlers from the East moved to these areas, they found apple trees ready for sale for their home orchards. He became a folk legend and was called either the Apple Tree Man or Johnny Appleseed.

Beth Chatto was a renowned gardener, writer and plantswoman from England. She received numerous awards for her writing and horticultural efforts. In 2002, she was given the Order of the British Empire (OBE) by Queen Elizabeth. Her exhibits at the Chelsea Flower Show earned ten Gold Medals. Beth’s garden is internationally known and is open to the public.

Church believed gardens should have a more human scale as opposed to the grandiose dimensions of the estate gardens common at the time. He designed over 2,000 residential gardens mostly in his home state of California including public gardens at the University of California at Berkeley and at Stanford University in Palo Alto. Church also helped to design Longwood Gardens near Philadelphia, Pennsylvania.

Clark and Captain Meriwether Lewis explored the American West in 1804-05 on assignment from President Thomas Jefferson. After returning from their adventure, Lewis named a genus of annual flowers, Clarkia, after him.

They also identified many other plants including Mahonia aquifolium (Oregon grape holly), Gaillardia (blanketflower) and Symphoricarpos albus  (snowberry) on their journey and brought them back to the East coast of the United States.

American botanist for whom the genus, Claytonia (Spring Beauty), was named. This plant genus includes some 26 species and is part of the Portulacaceae family. Most, but not all of the species are native to North America.

Clusius was a Flemish doctor and botanist who planned Europe's earliest botanic garden, Hortius Botanicus in Leiden, Holland. As Prefect of the Royal Medicinal Garden in Prague, he started a collection of tulips from seed. He subsequently became Prefect of the botanic garden in Holland and over six hundred tulips were planted at Leiden by 1593. They were some of the earliest introductions of that species into the Netherlands.

In the middle 18th century, Collinson, a merchant in London, made contact with John Bartram, a noted horticulturist and plant hunter from near Philadelphia, Pennsylvania. Through their long-term friendship, many, many native American plants were imported into England.

As a result of these efforts, he was named as a Fellow of the Royal Horticultural Society.

French botanist credited with discovering around 3,000 species of plants in his expeditions around the world. He named the genus, Bougainvillea, after Louis-Antoine de Bougainville, the Captain of one of the ships on an expedition.

Dr. John L. Creech was the Director of the U.S. National Arboretum from 1973 to 1980. Earlier in his career, he was a plant explorer who spent time in Japan and several other countries in search of new ornamental plants. He is credited with sending hosta seeds to noted hostaphiles including Gus Krossa and named one cultivar for himself, H. ‘Creech’.

Original host of "Crockett's Victory Garden" on public television beginning April 16, 1975.  The show is now called "The Victory Garden". The "Victory Garden" concept was based on the small backyard vegetable gardens that were encouraged during the food rationing that occurred because of World War II. Crockett was raised on a fruit farm and graduated from the Stockbridge School of Agriculture at the University of Massachusetts

 He wrote three books of gardening advice including Crockett's Victory Garden, Crockett's Indoor Garden and Crockett's Flower Garden.

After his retirement, he was replaced as host of the show by Bob Thomson.

On behalf of the  Royal Botanical Gardens at Kew near London, Cunningham explored Australia, Brazil and New Zealand. He was a type of "Johnny Appleseed" who was known for spreading the seeds of fruit trees wherever he traveled. He eventually became Superintendent of Sydney Botanic Garden.

Many plants associated with him contain the name cunninghamii including Araucaria cunninghamii, Eucalyptus cunninghamii, Nothofagus cunninghamii, Olea cunninghamii, Banksia cunninghamii, Corchorus cunninghamii, Podocarpus cunninghamii, and Zehneria cunninghamii.