What does 2 Kings 19:29 mean?

'Here’s a sign for you, Hezekiah: This year you’ll eat what grows by itself, and next year what comes up on its own. But in the third year, you’ll plant and harvest, plant vineyards and eat their fruit.' 2 Kings 19:29 - Modern Text Bible

(God gives Hezekiah a sign: things will be tough for two years, but by the third year, life will return to normal and the land will recover.)