Amy Chozick reviews the controversial use of shrub roses (9 million sold last year), cross bred to require little maintenance

he new varieties are controversial, with some long-stem-rose purists saying that even planting them is cheating. Still, shrub roses are now the fastest-growing segment of the rose market, with the nine million plants sold last year accounting for 30% of all rose sales — double the market share for shrub roses in 2002, according to the American Rose Society.
“These kinds of numbers are unheard of for roses,” says Keith Zary, director of research at wholesale rose distributor Conrad-Pyle, which sold 1.8 million of its “Knock Out” red-rose shrubs in 2003, up from 135,000 in 2000, the year it introduced the variety. Historically, a popular rose wouldn’t even hit the half-million mark, he says. At Jackson & Perkins, a nursery based in Medford, Ore., shrub-rose sales are up 6% this year, and the nursery’s multicolored “Garden Ease Rose Blankets” — $39.95 carpets of color that bloom into the fall — are now one of the company’s biggest sellers.