The type of explants tested had an influence on the growth responses of the three Philodendron cultivars as shown in Table 1A. Among the three explants tested, lamina explants were the least responsive as their growth was only observed following the 2,4-D treatment (i.e. 2.8%) in ‘Imperial Red’ and following the combined 2,4-D and TDZ treatment in ‘Imperial Red’ (i.e. 36.1%) and ‘Imperial Rainbow’ (i.e. 13.9%). The petiole explants were comparatively more responsive as growth manifested in all the three cultivars and under different PGR treatment conditions except for ‘Imperial Green’ with the TDZ treatment.