Please note:

Strawberries/Tomatoes/Carrots/Melons can be turned into each other because they share the same racial type

however if you decide to change a melon into a strawberry (or other) - the new item may not be the same looking as if it  was the original

when you convert these to something else it will say "carrot" or "strawberry" on the text of the live/birthed item even after your change it to the desired plant type

ALso, the seeds/offspring might even show a different text - 

EXMPLE: You converted a melon to a carrot-the plant will say Melon though it looks like  a carrot now....when it starts to produce seedlings they will all say MELON and not  carrot​

NOTE YOU CANNOT UPDATE/CONVERT/CHANGE anything that is Version 15 to another version-it will not accept the size/mutation/particles and it will go grey, be the default titanic size and NOT  gain any resources-you can always convert it back to a version 15 to fix this-for version 15 only has a certain amount of textures/particles -where as version 18 has many.