Minecraft wiki entry for Dead_Bush, associated text: Dead bushes generate on sand, red sand, podzol, dirt, coarse dirt and terracotta in deserts, badlands, and old growth taigas. Dead bushes generate twice as commonly in desert biomes as they do in old growth taigas, and 10 times more often in badlands than they do in deserts (ratio of 1:2:20 – taiga:desert:badlands). In Java Edition, dead bushes can also generate in swamp biomes.