Is Castor oil safe and good for your eyelashes to grow?

There are no scientific findings that castor oil will grow your lashes. However, silica is a natural product and has been known to grow healthy hair. Best of luck, 

The only alternative to Latisse for eyelash enhancement is mascara. Latisse is the only FDA-approved product for growing eyelashes longer, darker and fuller. That means it has been validated in clinical studies for safety and effectiveness.

There is no scientific evidence to prove that castor oil will do anything in terms of helping your eyelashes grow. There are no alternatives to Latisse as it is the only FDA approved treatment to help the eyelashes grow thicker, darker, and longer.

Castor oil has absolutely no scientific proof behind it that it will work. It will definitely keep your lashes moist. But that's about it. Latisse is the only FDA approved treatment to grow your lashes longer, thicker, and darker. There isn't a natural alternative or anything that has any scientific or medical backing behind it. "This answer has been solicited without seeing this patient and cannot
be held as true medical advice, but only opinion. Seek in-person
treatment with a trained medical professional for appropriate care."