Six organic amendments and one soil sterilant (Basamid) were screened at different rates to a given amount of soil, for their efficiency to enhance the population ofTrichodermaspp. Coffee pulp significantly (P= 0.01) enhanced the population ofTrichodermaspp. in the soil compared to other amendments. The enhancement was rate‐dependent with 16 and 22 g carbon giving the optimum population. TheTrichodermaspecies enhanced includedT. koningii, T. harzianumandT. longibrachiatum.The implications of these results in relation to biological control of soil‐borne plant pathogens are discussed.