Monty has advice on how to pot up one of the stars of the festive season - amaryllis. Carol Klein surrounds herself with colour and scent in Kent as she champions one of winter’s most spectacular shrubs – witch hazel. In South Yorkshire, Arit Anderson visits Professor Nigel Dunnett to find out how the man responsible for transforming many public green spaces tends his own garden. Toby Buckland joins Sue Kent on her allotment in Swansea to share tips on how to prepare for the growing season ahead. There's also a couple in Cornwall whose allotment is the ultimate ‘secret garden’, perched on the side of a cliff, plus a gardener in Herefordshire who preserves the spirit of summer throughout the darkest days of winter by pressing flowers.