Where can I buy a flower that’s called Lucy/Esme/Delores/Archibald/Rotherham?
To buy flowers that’s called Lucy/Esme/Delores/Archibald/Rotherham, you should visit some of the best online flower shops. You can definitely find flowers which you are looking for, by visiting some best online flower shops like Roses Only.
The Royal Horticultural Society has a service on their website rhs.org.uk which they will let non-members use without payment. You click the Plant Finder link and type in the name, and it will find varieties of plant which share that name, and link you to nurseries which might sell them. If it’s an obscure plant, or an obscure name, you might find that only one nursery sells it and they are out of stock or it’s out of season. Then you buy a nice pot mum or an orchid instead.