Name Chestnuts. What The garden of two plant collectors, packed with large collections of bulbs and alpine plants. Meadow areas with naturalised bulbs, greenhouses and cold frames for propagating and raising bulbs and alpines. Where Suffolk. Size Approximately one acre. Soil Boulder clay overlaid with decades of compost. Climate Mild and temperate. The garden is protected from winds by a shelter belt of trees. Average annual rainfall is 1,185mm. Hardiness zone USDA 8.