SHARMA, B.P.SUHAS, KHANVILKAR SAGAR2016-11-282016-11-28201548341http://krishikosh.egranth.ac.in/handle/1/87812ABSTRACT The present investigation entitled, “Effect of plant spacing and depth of planting on growth and flowering of tuberose (Polianthes tuberosa L.)” was carried out at the Research Farm of the Department of Floriculture and Landscape Architecture, Dr. Y.S. Parmar university of Horticulture and forestry, Nauni, Solan (H.P.) during 2014-2015. The experiment was laid out in Randomized Block Design having 16 treatment combinations of four spacing i.e. 25cm x 15cm, 25cm x 20cm, 25cm x 25cm and 25cm x 30cm and four planting depths i.e. 2.0, 4.0, 6.0 and 8.0cm each that being replicated thrice. The results revealed that a plant spacing of 25cm x 30cm with a depth of 2.0cm had an optimal response on vegetative/growth parameters whereas a spacing of 25cm x 30cm with a depth of 8.0cm had improved all the flowering and bulb production parameters. The early sprouting (13.96),tallest plant (52.67 cm), more number of leaves/plant (44.93), early opening of first pair of floret (125.86 days), longest spike (62.10 cm) and longest rachis (34.30 cm) were recorded in plant spacing of 25cm x 30cm with a depth of 2.0cm, whereas, maximum spike diameter (1.33 cm), maximum weight of spike (48,86 gm), longest duration of flowering (23.33 days), more bulbs and bulblets/plant (25.80), largest bulb (3.92 cm) and maximum weight of bulbs and bulblets/plant (354.23 g) were recorded in a spacing of 25cm x 30cm with a depth of 8.0cm. Maximum number of florets per spike (47.46) was observed in spacing of 25cm x 30cm at a depth of 4.0cm. The parameter per cent sprouting of bulbs were not affected significantly by the different treatmentsenThesis