Monty is at Longmeadow, keeping on top of seasonal maintenance as well as enjoying the plants of high summer.Adam Frost travels to Sissinghurst Castle Gardens to view a new area of the garden which was inspired by a visit to the Greek island of Delos, and in Berkshire we find out how one enthusiast keeps her garden full of interest in every season of the year.In West Sussex, we get tips on producing the perfect dahlia from a grower with over 50 years of experience, and we travel to Kent where we meet a gardener with a passion for colourful containers. We also get plenty of inspiration and tips from our viewers' gardens.