Q.fertilizing tomatoes
Have you heard of using banana peels with epsom salt to stimulate root growth or in general to help tomato plants get a good start? Someone at my community garden recommended this. I’ve never heard of it. So, haven’t tried it.
I’d love any info or direction on using these elements.
Thank you!

Yes, we have heard of these uses in the garden.
We do recommend composting your Banana peels. The link below has more information.
https://www.gardeningknowhow.com/composting/ingredients/banana-peels-compost.htm
Epsom Salt is a great product for the garden. I myself use it regularly in my herb and vegetable beds.
Here is a link that has information on using this inexpensive product.
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/epsom-salt-gardening.htm
https://www.gardeningknowhow.com/lawn-care/lgen/using-epsom-salt-on-grass.htm
Now if you friend is having success with a certain technique, by all means give it a try! That's how we all learn!