English lavender (Lavandula angustifolia) is a multi-use ornamental plant native to the Mediterranean. In Malaysia, lavender has also been cultivated in the lowlands as a potted plant, besides Cameron Highland. However, studies on lavender cultivation are very scarce in Malaysia. Hence, this study on the effect of biochar on the growth quality of lavender cultivated as a potted plant in the lowland was initiated. This study was conducted in a greenhouse at Batu Rakit, Kuala Nerus, Terengganu, for seven weeks after transplanting. Growing media consisted of 3:7 soil:sand without biochar as the control. About 50g of paddy husk biochar and coconut shell biochar were added to the growing media as treatments, respectively. The parameters observed were plant height, stem diameter, number of branches, fresh and dry weight of shoots and roots and roots-to-shoots ratio biomass. This study found that adding biochar to the growing media positively affected the growth quality of the plants compared to the control. Paddy husk biochar significantly (P<0.05) improved stem height, number of branches and the root dry weight of L. angustifolia. Hence, adding paddy husk biochar in growing media is worth considering for English lavender cultivation in the lowlands of Malaysia.