Carrots, turnips and onions? Barley and flax? Juten puffs and mage caps? Only carrots, turnips and onions can grow in multiple biomes. Barley and flax only in the Plains and the Mistlands mushrooms only in the Mistlands. The other thing may be overhanging shade that the wind may have blown out of the way to show "healthy" but when the wind dies down covers the plant and denies it sun light and good health.