Pyrethrum Production


Climatic conditions, ecological zone

It is grown in Altitude of 1800-3000m a.s.l with a rainfall above 750mm pa. The soils are expected to be fertile, deep and well-drained, loamy volcanic soils with a pH >5.6. The temperature should be less than180 C for at least 6 weeks.

Ecological Requirement

Altitude:                     1800-3000m a.s.l

Rainfall:                     Above 750mm pa

Soils:                           Fertile, deep and well-drained, loamy volcanic soils, pH >5.6

Temperature:            Less than180 C for at least 6 weeks.

Plough before the onset of rains and eliminate perennial weeds. Planting is done in holes of 10x15cm. Propagate clones by splitting of mature plants or tissue-culture Raise varieties in a nursery first but uproot and discard after 4 years. In Kenya, pyrethrum is cultivated almost entirely by small-scale farmers. The crop is favoured by cool temperatures, which occur in the higher altitude (1800-2900m). Higher temperatures and dry weather have negative effects on flower yields and pyrethrin content. Recommended spacing is 30 x 60-90cm between raws and 10 x 15 between plants. Cutting back is usually near the end of the dry season and a new crop is established after 3 to 4 years