The current research was carried out at the Hort. Dept.,
Fac. of Agric., Benha Univ., Egypt, throughout the 2019/2020 and
2020/2021 seasons. To investigate the impact of water regime i.e.
(100, 70 and 50% of field capacity) on growth of Rosmarinus
officinalis L. plant in the two seasons. The results revealed that
differences treatments of field capacity increased the growth
parameters of rosemary plant in the two seasons. The use of field
capacity at 100% achieved the highest values on all studied
parameters of vegetative growth and some chemical composition,
except the total carbohydrates % in both seasons. On contrary, the use
of 50% FC scored the best values for total carbohydrates % and
essential oil productivity in both seasons. Consequently, it is
preferable to treat rosemary plants with FC at 100% in order to
achieve the highest levels of vegetative growth parameters. On the
other hand, it is possible to treat rosemary plant with 50% FC to
obtain the highest essential oil productivity.