Yikes, larkspur is toxic! It might have the Earl Grey name, but don't make tea out of that one! Earl Grey tea is made from mondarda.

Although Monarda is commonly called 'Bergamot' the flavouring in Earl Grey Tea is the citrus fruit Bergamot, not Monarda.

But you are absolutely right about not drinking Larkspur 'tea'!

Here is a link that might be useful: Bergamot

I didn't mean to suggest she make tea out of Larkspur, only that it would be fun to grow in her garden as Earl Grey is her favorite tea to drink.