A weed is a plant in the wrong place. Put a redwood in my garden and it would probably be the biggest weed in the world. Your question has no serious answer. Unless you mean smoking weed............
the worlds biggest yoyo is about the size of a hobo
The Amazon is the worlds biggest rain forest
The Catholic Church is the biggest charity in the worlds.
either a rose plant that eats flies or the worlds biggest pineapple.
You don't plant weed, they just grow from gardens.
A plant becomes a weed when it's not wanted.
Sour Diesel
The worlds biggest island is clearly Green Land its PNG
The worlds biggest selling drink is both Milk and water.
The worlds biggest tin sheep here
the worlds biggest volcano is Mauna Lao is in Hawaii
A weed is an unwanted plant.