Grow Time Formula
From Growtopia
This is the formula to find item grow time accordingly to the rarity
If Rarity is X,
37seconds × (X-1)+ 31seconds+ 12seconds( ((X-2)(X-1)) / 2) + 6seconds ( ((X-3)(X-2)(X-1)) / 6 )
This formula only applies to rarity 2 or more
But I think you guys know Rarity 1 is 37 seconds
Made By BenNgNg, a person EXCELS in Mathematics and growtopia hahaha