Master the Chelsea Chop with this informational pruning guide designed for cottage garden lovers and flower growers. Learn exactly when to cut back perennials in late spring to control height, delay blooms, prevent flopping, and create a longer, more staggered flowering season. This quick Chelsea Chop guide walks you through: What the Chelsea Chop is and why it works The exact timing (and how to adjust for your zone) Which perennials respond best How much to cut (½, ⅓, or selective stems) Before-and-after growth expectations Common mistakes to avoid Perfect for gardeners who want fuller plants, stronger stems, and blooms that last deeper into summer. If you love structured-but-romantic cottage garden design, this pruning technique will completely change how your borders perform.