Chemical Science Review and Letters ISSN 2278-6783 Chem Sci Rev Lett 2017, 6(21), 309-314 Article CS192048013 309 Research Article Statical analysis on Growth and Quality on Gladiolus (Gladiolus hybridus Hort.) K. K. Nagar,* A. Mishra, S. S. Patil and P. K. Bola Department of floriculture and landscaping, College of horticulture and forestry, (Agriculture University, Kota), Jhalarapatan, Jhalawar-326023(Rajasthan) Introduction Gladiolus (Gladiolus hybridus Hort.) a member of family Iridaceae is one of the important bulbous ornamental which occupies important position among cut flowers in domestic as well as international market. It is universally acclaimed prestigious cut flower [1]. Gladiolus bulbs, in botanical terminology, are referred to as corms, the main propagating material in gladiolus. A corm is a shortened and thickened section of the stem that appears at the base of the plant [2]. Gladiolus is an important cut flower crop, grown commercially in many parts of the world. It has gained popularity owing to its incomparable beauty, attractive colours, various sizes and shapes of florets, variable spike length and long vase life. Gladiolus produces beautiful spikes from December to March in the plains and from June to September in the hills of India. The Gladiolus is very rich in its varietal wealth and every year there is an addition of new varieties; hence varietal evaluation becomes necessary to find out suitable variety for a particular region. Improvement of any crop is a continuous process and in gladiolus also there is scope to improve the existing cultivars. In gladiolus the most common method of improvement is through hybridization. Since the gladiolus is highly heterozygous, it becomes more essential to evaluate. Like all other economical plants, the growth and development of gladiolus is governed by its genetic makeup and environmental factors of the growing region and various management practices. Among the various agro-techniques, the optimum planting time is of outmost importance. Present research efforts aim at standardization of planting date and suitability of varieties for local climate and edaphic conditions of the sub-humid zone of Rajasthan. Date of planting plays an important role in improving the vegetative growth, quality and bulb production of gladiolus [3]. Which also satisfies the consumer’s demands [4]. Earlier planting is beneficial as it allows plants to mature and increases the probability of harvesting prior to inclement fall weather. The mean values regarding plant height reveal that different planting dates significantly impacted on the plant height of Gladiolus [5]. Different planting schedule supply gladiolus steadily to the market as well as it adds to the beauty of the landscape longer. The timing of flowering from various planting dates is quite predictable under ideal environmental conditions. The growth and yield of gladiolus like other plants depend upon planting time e.g., number of florets/spike, spike length, floret diameter, floret length was best with October planting [6]. The present research work was planned to investigate the growth and flowering quality of gladiolus in early and late growing season and to study its correlation and regression with average weekly temperature ( 0 C) under agro- ecological conditions of sub-humid zone of Rajasthan and to establish a protocol for 10 th October planting dates with ‘Hunting Song’ which is commercially feasible and easily adoptable with minimum capital investment. Abstract A field experiment was conducted during winter season of 2015-16 to study “Statical analysis on Growth and Quality on Gladiolus (Gladiolus hybridus Hort.)” having 15 treatment combinations of five Varieties (V 1 - African Star, V 2 - Hunting Song, V 3 - Legend, V 4 - Pusa Srijana and V 5 - Snow Princess) and three planting dates (D 1 - 10 th October, D 2 - 25 th October and D 3 - 9 th November). Correlation with regression studies showed that between dates of planting with vegetative and flower quality characters has been depicted. Plant height had positive correlation with number of leaves per plant, leaf length, leaf width, main stem diameter, number of floret per spike, spike length, rachis length, and floret diameter . Keywords: varieties, planting dates, gladiolus, Correlation and regression *Correspondence Author: K. K. Nagar Email: kknagar.92@gmail.com