On the Feast of St Anthony (13th June) there is a tradition of blessing lilies in his hnour. Here is the prayer of blessing.
O God, Who art the Creator and Preserver of all mankind,
the Lover of spotless purity,
the Giver of all grace and everlasting life,
sanctify by Thy holy benediction these lilies,
which in thanksgiving, and in honour of St. Anthony,
Thy Confessor, we present for Thy blessing.
Pour down upon them, by the sacred sign of the holy Cross,
Thy heavenly dew,
Thou Who didst so kindly create them
to gladden man by their beauty and fragrance;
enrich them with such power,
that to whatsoever disease they may be applied,
or in whatsoever home they may be kept,
or on whatsoever person they may be borne with devotion,
through the intercession of Thy servant, Anthony,
they may cure every sickness,
repel the attacks of Satan,
preserve holy chastity,
and bring peace and grace to all who serve Thee.
Through Christ Our Lord. Amen.