Indigenous Soilless Substrate Compositions Affect Growth, Yield and Quality of Cut Antirrhinum majus

A study was conducted to develop indigenous soilless substrate compositions for improved growth, flower yield, stem quality and vase life of cut antirrhinum. Two experiments comprised of seven substrate compositions with variable ratios of saw dust (SD), peanut hulls (PH) and sugarcane pressmud (a by-product of sugar industry, which is rich in nutrients) or coco-coir (CC), rice hulls (RH) and sugarcane pressmud (PM) were used. Seeds were sown in plastic plug trays containing CC, silt (soil extracted from canal) and PM (1:1:1; v/v/v) substrate for seedling development and transplanted at the two to four leaf stage into lily crates with the treatment substrates. Plants grown in substrates containing SD + PH + PM (experiment I) indicated that plants grown in these soilless compositions died before flowering, while those grown in silt (control) performed best. While in experiment II, the highest quality plants were grown in 50% CC + 40% RH +10% PM. Quality was defined as plants with shortest production time (days), tallest plant height (cm), optimal leaf chlorophyll content (SPAD), highest leaf area (cm2), fresh and dry weight (g), longest vase life (days). Substrates containing CC, RH and PM (50% + 40% + 10%; v/v/v) were superior to substrates of SD, PH and PM. For commercial cut antirrhinum production, substrates with locally available components of CC, RH and RM can be recommended.