How big is the worlds largest plant?

Answer 1

Aspen groves are made up of a common root system, and all the "trees" are stems. That makes it technically a single plant, and at least one covers over a hundred acres. There are also some fungus growths that cover large areas and are, technically, a single plant.

However, if you are asking about the single largest tree, that would be the Coast Redwood of the Pacific Northwest. The largest single-stem tree ever measured was the Lindsey Creek Tree, a coast redwood with a minimum trunk volume of over 2,500 m3 (88,000 cu ft) and a mass of over 3,600 short tons (3,300 t). It fell over during a storm in 1905.

Answer 2

The Pando aspen grove in Utah is considered the largest plant in the world. It covers about 106 acres and is estimated to weigh around 6,000 tons. Its massive size is due to the interconnected root system that connects its numerous individual trees.