QuestionsHow to growTrees and ShrubsPlantingWinter planting 0 Vote Up Vote Down Wyn Bryan asked 14 years ago I have ordered new plants; e.g. clematis , cotoneaster, pyracantha, acer ,but with heavy frost forecast should I postpone delivery & planting.? The soil is heavy clay. 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 6 years ago These plants are all hardy and can be delivered ready for planting when the weather improves. They will be in pots and will suffer no harm.