French and spanish lavender cannot come back as they are not as tolerant to frosty winters. Once it's leggy, it's time to invest in a new lavender.
My first year with lavender. Is this what it’s supposed to look like
But not all lavender will grow back every year.
Does lavender come back every year. I also cut it back quite hard last year but i went on monty's advice, as it was a new lavender to make it bushier. However don’t give up hope, weaker lavender plants can be grown indoors so long as you put them in pots.