What is the biggest plantes?

Answer 1

Saturn

Answer 2

Among plants, Rafflesia has the largest blossom of all flowering plants. The giant sequoia trees are the tallest individual living organisms that are plants.

The most massive plants include group colonies of Aspen trees, subterranean fungi such as the honey mushroom (Armillaria ostoyae), and underwater beds of the sea grass Posidonia oceanica, which can stretch for several miles.

For typo's see related question about planets.

Answer 3

Right now the best planet in our solar system is Jupiter.