FollowingastudyinBoskoopintheNetherlands,arankingofthebestcold-resistantvarieties was published. Thefollowingvarietiesaresusceptibletoresist at-18 /-20 cunder'normal' conditions:hardinessreducesiftheplantisexposedtocoldwinds,ifthesoiliswet,iftheplantisin growth (early or late frost),...

Here are the varieties we grow that have well performed : Freedom Bell, Kimberley, Kramer's Suprme, L.T. Dees, Lady Vansittart, Margherita Coleoni, Sanpei Tsubaki et Spring Festival.