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ABSTRACT
Castor is a multipurpose crop of international interest because of its commercial importance and useful materials. An experiment in the screenhouse was carried out to determine the effect of different potting medias on the growth of Castor (Ricinus communis). The experiment involved thirteen treatments ( top soil, poultry manure, rice husk, Oil palm refuse bunch and their mixtures in ratios of 1:1, 1:2 and 2:1). The treatments were laid out in a complete randomized block (CRD) using three replications. Plant growth was accessed through plant height, stem girth, number of leaves, leaf length, leaf width, fresh weight and dry weight. Potting media had significant effects (P< 0.05) on plant height throughout the period of the experiment. Results shows that plants in the mixture of top soil and poultry manure (2:1) were the first to emerge. Height was similar among potting media. The thickest stem was discovered in top soil. A mixture of TS and PM (1:1) were discovered to have the highest number of leaves. Top soil was discovered to have the highest dry weight (40.20g). Since dry weight is the actual growth, top soil is suggested for raising castor bean seedlings.
