Abstract
This study was conducted in greenhouse of Department of Horticulture and Landscape Design, College of Agriculture and Forestry, Mosul University. The aim of this work is to study the effect of two planting dates, December and March after treated the cuttings with IBA+NAA mixture at 0+0 (control), 1000+1000 and 2000+1000 mg.l-1 in quick-dip method for 10 seconds, in addition to wounding the cuttings base or without. The results of this investigation were showed that planting date had a great effect on rooting ability, planting cuttings in March gave higher rooting percentage 58.89%, and best results of all rooting characters studied. Wounded cuttings gave higher values of rooting percentage 58.11% and all other characters. On the other hand, cuttings treated with IBA+NAA mixture at 2000+1000 mg.l-1 gave 58.33% rooting percentage, 3.91 roots per cutting, longest root length 7.98cm, 1.58 shoots number and 1.25cm shoot length. In general, wounding apical cuttings taken in March and treated with 2000+1000mg.l-1 IBA+NAA mixture proved most effective treatment in rooted Gardenia thunbergia cuttings.
