Owing to the importance of foliage plants in indoor gardening, the experiment was carried out to determine the effect of different levels of NPK on growth and development of Sweet--heart plant (Philodendron scandens). The study was carried out at the College of Horticulture, Rajendranagar, Hyderabad, Sri Konda Laxman Telangana State Horticultural University. This was during Kharif season of the year 2019-20 in Completely Randomized Design with seven treatments and replicated thrice. There was an increase in growth parameters like plant height (44.00 cm), stem diameter (37.46 mm), number of leaves per plant (49.50) when Philodendron plants treated with N:P:K (1:1:1) – 2 g per poly bag at 30 days interval (T1). Whereas, application of N:P:K (1:1:1) – 2 g per poly bag at 45 days interval - T2  significantly resulted maximum plant spread (E-W) (49.67 cm), plant spread (N-S) (52.33 cm). Contrary to this among the treatments, T7- Control (without fertilizers) plants showed shorter plant height (36.83 cm), lower plant spread (E-W) (36.33 cm), plant spread (N-S) (42.67 cm), stem diameter (30.33 mm), significantly minimum number of leaves per plant (42.00).

A shade house (75%) experiment was carried out to determine the effect of different levels of NPK on growth and development of Dieffenbachia seguine (Jacq.) Schott plants at College of Horticulture, Rajendranagar, Hyderabad, Sri Konda Laxman Telangana State Horticultural University during Kharif season of the year 2019-20 in Completely randomized design with seven treatments and replicated thrice. The results revealed that different levels of NPK significantly influenced the Dieffenbachia plants growth and development. Among different inorganic fertilizer treatments, application of N:P:K (1:1:1) – 2 g per poly bag at 30 days interval (T1) significantly recorded maximum plant height (76.00 cm), growth rate in respect of plant height at 45, 90 and 135 days interval (2.01, 2.50 and 3.07 cm/day respectively), plant spread (E-W) (59.00 cm), stem diameter (37.63 mm) and number of leaves per plant (7.33).