“I’m not a collector. I’m an addict!” says Sam McKnight, the hairstylist to Princess Di and Kate Moss who swapped his scissors for pruning shears during the U.K.’s first lockdown.

Years ago, McKnight would take a deck chair and a book into The Regent’s Park on summer evenings. It was there that he discovered the Queen Mary’s Rose Gardens and imagined planting his own. Today, he has nearly 100 varieties growing behind his North London house, of which his favorite is the fittingly named Generous Gardener, a climber of the palest pink. “I need a bigger garden,” he says. “I am at peak rose!”