Snow And Lemon Verbena

Snow And Lemon Verbena

Advice please! The recent heavy snow buried most of my plants! When it melted my baby Rosemary and my Christmas Rose were fine, and most of my other plants are dormant anyway. But I have four Lemon Verbena plants, and the leaves were green before the snow came; now the leaves are black. Are these plants going to be okay? I wouldn't be worried about an adult shrub, but these are just babies that I got as cuttings a year ago! This is their first winter. I live in South-East England, on the Essex/Norfolk border. Mods: Can we please have a shrub: Lemon Verbena tag?
My Room

My Room

Addendum

Addendum

New apartment!

New apartment!

Just spreading the Hoya love

Just spreading the Hoya love

Creative planting

Creative planting

My first seedlings!

My first seedlings!