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Vegetatively propagated bedding plants are produced during the late winter and early spring when outdoor photosynthetic daily light integral (DLI) is low, especially in northern latitudes. Our objective was to quantify how propagation DLI influences subsequent growth and development of annual bedding plants. Cuttings of Angelonia angustifolia Benth. 'AngelMist White Cloud', Nemesia fruticans (Thunb.) Benth. 'Aromatica Royal', Osteospermum ecklonis (DC.) Norl. 'Voltage Yellow', and Verbena ·hybrida Ruiz 'Aztec Violet' were harvested and propagated in a glass-glazed green- house. After callusing ('5 molm -2 d -1 for 7 days), cuttings of each species were placed under one of three different fixed-woven shadecloths providing '38%, 61%, or 86% shade or no shade with 16 h of supplemental light for 14 days. Rooted cuttings were then transplanted into 11-cm containers and grown in a common greenhouse of 21 ± 1 8C and DLI of '12 molm -2 d -1 to identify any residual effects on subsequent growth and development during the finish stage. As DLI during propagation increased, time to first open flower decreased for Angelonia, Nemesia, Osteospermum, and Verbena. For example, time to flower for Angelonia and Osteospermum was hastened by 23 and 19 days,respectively,asDLIduringpropagationincreasedfrom1.2to12.3molm -2 d -1 .Our research can be used to predict growth and flowering under varying propagation DLIs for the cultivars of Angelonia, Nemesia, Osteospermum, and Verbena in the study.

Photosynthetic Daily Light Integral During Root Development Influences Subsequent Growth and Development of Several Herbaceous Annual Bedding Plants