2. Placing of flowers on the altar
It is a popular thing that the altar is decorated with flowers during most times of the year. Flowers are placed around the altar (but not on the table itself). This Should not be done in Lent with a few exceptions too. Thus, the General Instruction states in 305. During Lent it is forbidden for the altar to be decorated with flowers. Exceptions, however, are Laetare Sunday (Fourth Sunday of Lent), Solemnities, and Feasts.
