Christmas Wheat There is a Hungarian custom of growing wheat during Advent. The wheat seeds are planted on St. Lucia Day and remind us of the spiritual rebirth at Christmas time. Supplies Needed: Small Flower Pot Potting Soil Grains of Wheat Fill pot with soil. Lay grains on top of soil and gently press down until they are covered. Water daily and keep warm on your nature space. The children will enjoy watching the wheat grow as Christmas approaches.