Minecraft wiki entry for Snowlogging, associated text: Other small plants cannot be snowlogged: beetroot crops, carrot crops, dead bushes, dead coral fans, melon stems, nether wart, potato crops, pumpkin stems, saplings, sea pickles, sugar cane, sweet berry bushes, and vines. A sweet berry bush may appear to be snowlogged while snow falls on it, but the snow breaks as soon as it touches the ground.