The Red Weed is an item found in EarthBound Beginnings. They are plants that can be found throughout Magicant, and can be distinguished by their distinctive red color, in contrast to the other grass-like plants which are colored green. To obtain them, they simply need to be checked. There is a total of three red-colored plants, and every plant holds onto an infinite amount of Red Weed.
In their current state, they do not have any real use, but when taken to Queen Mary's Fountain to in western Magicant, they will transform into Magic Herbs, and be able to replenish 30 HP each.