You need 1 Plant Man to evolve Madara in ASTD. That unit is used for the first evolution step, and the rest of the requirements are usually tied to the evolution materials and any additional Madara form upgrades.

Quick scoop

The wording in ASTD videos and wiki pages is a little inconsistent, but the Plant Man requirement shown for Madara’s evolution is one Plant Man.

What to check

  • Make sure you have the correct Madara unit version.
  • Also confirm the other evolution materials, because Madara’s evo chain can differ by form.
  • If you mean a specific Madara variant, the exact cost may change.

Short answer

1 Plant Man.

TL;DR: Madara’s evolution uses 1 Plant Man for that step, according to the available ASTD guides.