Overview: Monty harvests his loofahs, plants tulip bulbs in pots, gives a masterclass in making leafmould and reflects on the gardening year. Carol Klein joins a special autumn colour tour at the National Arboretum in Gloucestershire, an indoor gardener shares their passion for terrariums, and from north Somerset comes a look at the work involved in creating a spectacular autumnal display from seasonal produce. Also, more viewers share what they’ve been getting up to in their gardens.