YOU SAID:
If are roses them will flourish
INTO JAPANESE
バラなら彼らは繁栄するだろう
BACK INTO ENGLISH
Roses will make them prosper.
INTO JAPANESE
バラは彼らを繁栄させるでしょう。
BACK INTO ENGLISH
Roses will make them prosper.
Okay, I get it, you like Translation Party.