Frost candles are set up in the apple orchards in case of icy temperatures. You need between 200 and 250 candles per hectare that burn up to eight hours. The warmth of the small flames makes the temperature rise by a few degrees, just enough to protect the young shoots and flowers of the Ambrosia™ trees. Then a magical flickering and glowing lights the white sea of flowers in icy spring nights.
Frost irrigation is another method to protect the delicate flowers. When it is very cold at night, apple producers turn on the frost irrigation system. Water then trickles on the trees, freezes and forms protecting ice shields around the flowers, which warm the buds and flowers as the water releases energy while freezing. The next morning you can see a fairy tale-like landscape: The Ambrosia™ apple trees are decorated with hundreds of delicate ice flowers glittering in the spring sun. When the temperatures rise, the ice melts and falls down with a quiet clang. The undamaged flowers can now become honey-sweet Ambrosia™ apples that smell like nectar.