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human
[Guardians of the Galaxy] Question about Rocket Racoon and Groot. (SPOILERS!!!)

I loved the movie but I found it kind of weird that Rocket was so sad that Groot was going to die when he protected the group from the ship crash, yet he somehow knew that putting one of Groots sticks in a flower pot would bring him back to life.

If Rocket could simply just regrow Groot, then what was the point of him being so sad it? Did he already know he could do that or was it just some sort of desperate (and successful) attempt to bring back Groot?
gpt
Rocket didn't actually know that putting part of Groot in a pot would work.  Rocket was grieving and put a part of Groot in the pot out of desperation and hope that he could regrow like some species of plants.  When they fly away from the planet and Groot first moves you can see the elation and relief on rockets face that he was alive.