Um?!

[Isa730]

Spoiler: Fun crop thing!

My first year growing the new crop?! I didn't even notice it until I tried harvesting the crops in that square, holy crap!!

 

[VampireCake]

Oh, awesome!

 

[Cuusardo]

Surprise!

 

[Maher]

Here's hoping your axe wasn't at Clint's when you found this!

 

[FilthyGorilla]

And there’s another giant crop!

 

[KeySmasher]

Giant crops don't wither across seasons, so even if your axe was being upgraded, you will be fine. There are five crops that can spawn as giant if left sitting in a 3x3 patch and they provide more than 9 units when you harvest them. See https://stardewvalleywiki.com/Crops#Giant_Crops