How to Grow Japanese Iris. Japanese Iris can be grown outdoors from seed by sowing at a depth of 6mm in the autumn or winter. It is best to sow them into flats in a shady part of the garden. After they have been exposed to the elements for a month or so (frost required), bring the flats indoors until the spring.he Japanese Iris and Oriental Iris are the common names for Iris Kaempferi / Iris ensata. They are hardy perennials, and bloom in the summer. Japanese Iris has sword shaped leaves and carries blue, white or purple flowers atop 70 to 90 cm long stems.
Clandestine means secretive, so a clandestine affair is an affair  that is kept hidden. It usually refers to secretive romantic  relationships. 2 people found this useful.
a relationship that is kept or done in secret, often in order to conceal an illicit or improper purpose.