Since Russia does not have climate conductive to growing palm trees, willow twigs are used instead palms.
In the Russian Orthodox Church, Ukrainian Orthodox Church, Ukrainian Catholic Church, and Ruthenian Catholic Church, the custom developed of using pussy willow instead of palm fronds because the latter are not readily available that far north. There is no canonical requirement as to what kind of branches must be used, so some Orthodox believers use olive branches. Whatever the kind, these branches are blessed and distributed together with candles either during the All-Night Vigil on the Eve of the Feast (Saturday night), or before the Divine Liturgy on Sunday morning. The Great Entrance of the Divine Liturgy commemorates the “Entry of the Lord into Jerusalem”, and so the meaningfulness of this moment is punctuated on Palm Sunday as everyone stands holding their branches and lit candles. The faithful take these branches and candles home with them after the service, and keep them in their icon corner as an evloghia (blessing). (Link)
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