Rose in greenhouses, and in warmer countries they may also be grown under cover in order to ensure that the flowers are not damaged by weather and that pest and disease control can be carried out effectively. Significant quantities are grown in some tropical countries, and these are shipped by air to markets across the world. Some kind of roses are artificially coloured using dyed water, like rainbow roses. Rose perfumes are made from rose oil (also called attar of roses), which is a mixture of volatile essential oils obtained by steam distilling the crushed petals of roses. An associated product
Nelumbo nucifera dish. In Kerala (in Malayalam "താമര") and Tamil Nadu, this end product is called " Thamara Vathal". In [China] and Korea, lotus leaf tea (연잎차 "yeonipcha") is made from the leaves of the lotus. In Korea, lotus flower tea (연꽃차 "yeonkkotcha") is made from the dried petals of the white lotus. The stamens can be dried and made into a fragrant herbal tea (), or used to impart a scent to tea leaves (particularly in Vietnam). This Vietnamese lotus tea is called "trà sen", "chè sen", or "chè ướp sen". The petals, leaves and rhizome can also all be eaten