Carnation cv. Master plants fertilized with 250 ppm N and K fertigation through urea and MOP + 250 ppm NPK foliar spray through a water soluble fertilizer Sujala (19 : 19 : 19 NPK) once a week is improved flowering as well as quality parameters and proved superior over the earlier recommended practices and the rest of the treatments. DOI: http://dx.doi.org/10.3329/bjb.v44i1.22736 Bangladesh J. Bot. 44(1): 133-137, 2015 (March)

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The present investigation was carried out at the experimental farm of the Department of Floriculture and Landscape Architecture, Dr Yashwant Singh Parmar University of Horticulture and Forestry, Nauni, Solan (HP) during (2013- 14) to find out most suitable cultivar and pot size for producing best quality and most presentable potted azaleas. The experiment was laid out in a Factorial Completely Randomized Block Design having 45 treatment combinations, viz. fifteen cultivars (John Herrens, Winter Hawk, White Rosebud, Boy-O-Boy, Summer Time, Pink Tama, Red Tomahawk, Shanghai Baby, Super Red, Nightingale, Empress, White Bouquet, Lady Love, Anniversary Joy and Royalty) and three pot sizes (25 , 20 cm and 15 cm diameter) respectively. Results revealed that among the various cultivars used ‘White Bouquet’ recorded maximum values in terms of most of desirable characters viz., number of shoots per plant (22.77), plant spread (45.18 cm), number of flowers per plant (27.39), number of flowers per plant open at a time (19.34) and pot presentability score (84.33) whereas among the pot sizes, 25 cm diameter pots exhibited maximum plant height (32.95 cm), maximum shoots per plant (17.35), plant spread (32.06 cm), number of flowers per plant (18.04), flower diameter (7.31 cm), number of flowers opened at a time (13.50) and pot presentability score (74.71). The interaction effects of cultivars and pot sizes indicated that cv. ‘White Bouquet’ gave better performance w.r.t. various growth, flowering and presentibility attributes of potted azaleas especially when grown in 25 cm diameter pots.

to evaluate the effects of different mulches and environmental conditions on growth, quality and yield of carnation cut flowers under naturally ventilated polyhouse conditions. Different types of mulch were replicated six times in a plot of 1.0 × 1.0 m size. Mulching with spent mushroom compost (M1), grass (M2), pine needles (M3) along with control (M0) was done 15 days after transplanting of rooted cuttings. The results revealed that plants mulched with spent mushroom compost (M1) recorded maximum duration of flowering (28.77 & 28.97 days), minimum days taken to reach harvesting stage (141 & 132.33 days), highest number of cut flowers per plant (6.50 & 9.47) and vase life (18.30 & 23.37 days) during first and second flush, respectively as compared to control. The maximum temperature and relative humidity inside greenhouse were 39.8ºC and 85 %, respectively. However, maximum soil temperature was recorded in the plots mulched with pine needles.

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