The guide explains which bedding, perennials and roses respond best to deadheading now, and how often to remove spent blooms for long-lasting displays. In July, UK gardeners are urged by RHS experts to focus on deadheading flowers to prevent borders, pots and hanging baskets losing colour early. Yet those same displays can fade fast once flowers go over, leaving everything looking tired by the time August arrives. This month gardeners are being urged to add one simple job to their routine - deadheading. Why deadheading in July keeps borders bloomingDeadheading means taking off flowers as they fade rather than letting them dry on the stem.