Horticulture is the branch of agriculture that deals with art, science, technology, and business of growing plants. It includes the cultivation of medicinal plants, fruits, vegetables, nuts, seeds, herbs, sprouts, etc. Horticultural crops in Kenya include flowers, fruits, vegetables, and potatoes.
Horticultural performance and statistics over the years has seen a steady growth, the following link provides some of the supporting data on horticulture http://softkenya,com/farming/horticulture-in-kenya/
FreeKenya offers training sessions on good agricultural practice with respect to horticulture as well as other agricultural activities. Read more on the same at Ask for Help.