TV gardening expert Katie Rushworth is promoting a simple guideline she says helps produce a “perfect” summer garden. Across reporting from outlets in the UK, the advice centers on a “70/30 rule,” presented as an easy method for planning and maintaining garden plants to achieve better summer results. The coverage describes Rushworth’s approach as a practical framework gardeners can apply rather than a complex, specialist routine. While the articles focus on the rule itself and its potential benefits, they do not present detailed step-by-step horticultural instructions or specific plant lists within the brief summaries provided. Instead, they frame the guidance as a straightforward way to improve the look and performance of a garden during the summer months. Both sources align on the central message: Rushworth’s “70/30 rule” is her key piece of summer gardening advice, and it is shared to help gardeners achieve more reliable outcomes during summer 2026.