Kiambu County is located in the central region and borders Nairobi, Kenya’s capital city and the commercial hub, to the north. With a population of 2.4 million people, it is the second most populous county in Kenya after Nairobi.
Kiambu is divided into 12 sub counties that include Gatundu South, Gatundu North, Juja, Thika Town, Ruiru,Githunguri, Kiambu, Kiambaa, Limuru, Kikuyu, Kabete and Lari.
The county experiences long rains between mid-March to May followed by a cold season usually with drizzles and frost during June to August and the short rains between mid-October to November.
Average rainfall in the county is 1,200mm even though this varies with altitude- with higher areas receiving as much as 2,000mm and lower areas receiving as low as 600mm. Temperature ranges from 7°C in the upper highlands to 34°C in the lower midland zones.
The county is covered by three broad categories of soils which are: high level upland soils, plateau soils and volcanic footbridges soils. These soils are of varying fertility levels with soils from high-level uplands, which are from volcanic rocks, being very fertile.
Their fertility is conducive for livestock keeping and production of various crops.The main food crops grown in the county include maize, beans, Irish potatoes, bananas and vegetables.
Horticultural crop production plays an important role in the economy of Kiambu County. Major vegetables include French beans, snow peas, kales, cabbage, garden peas, tomatoes, spinach and carrot among others.
Herbs and spices grown include dhania, basil, mint, rosemary, parsley and asparagus and are marketed within the country while others are for the export market. Pineapples and mangoes are also grown in addition to avocado. Floriculture is also practiced in various sub counties including Lari, Limuru, Thika, Juja and Ruiru.
Coffee and tea are the main industrial crops grown even though macadamia is also upcoming.
Pyrethrum is also another major crop in the county. Dairy industry is the leading enterprise with nearly 70% of the farm families keeping an average of 2-3 cows under zero grazing systems.
Poultry and pig keeping come second, with egg production playing a significant role in income generation. Fish farming as well as Apiculture are also practiced.