EFFECT OF PHOTOPERIOD AND IRON SPRAY ON GROWTH AND FLOWERING OF CAP JASMINE Gardenia jasminoides Ellis

Abstract

The study was conducted in the lethal house of horticultural station unit, Horticulture and landscape Department/Faculty of Agriculture/University of Tikrit. To study the effect of the photoperiod (shortening daylight to 9 hours and without shortening daylight) iron foliar every 15 to 30 days in addition to the treatment of non-spray on grafted or non-grafted. The results showed that the treatment of shortening the day caused the earliest in bud burst took place in fall season as recorded 32.96 day while non-shorting day gave 43.46 day for grafted gardenia. The grafted gardenia response to spray iron and gave the treatment of spraying every 30 days the highest rate of increase of the height plant to 68.04 cm and the highest rate the number of flowers per plant reached 7.30 flower and fewer buds falling reached 2.13 bud flower. Non-grafted gardenia similar trend response to iron foliar, treatment iron foliar every 30 day gave highest height plant 50.50 cm and the highest weight and diameter and age flower was 3.21 g and 3.20 cm and 4.11 day.