Rosemary, a hardy and fragrant herb, is a staple in gardens and kitchens alike, but it can sometimes become woody and patchy. This article delves into the art of reviving a woody rosemary, offering expert insights and practical tips. Christopher O'Donoghue, director of Gardens Revived, emphasizes that rosemary's woodiness is a natural part of its aging process. However, it's crucial to understand that the plant won't regenerate from old, bare wood, making rejuvenation a delicate balance between cutting back and encouraging healthy growth.
Pruning with Precision
Pruning is the cornerstone of revival. O'Donoghue advises finding the green growth's end and the woody stems' beginning, then cutting just above that point, ensuring some green growth remains. Secateurs and pruning saws are essential tools, with the Wilkinson Sword Comfort Ratchet Pruner and Silky Zubat Professional being recommended. The one-third rule is crucial; never remove more than a third of the plant at once, and gradual pruning over months is preferable to a single, harsh cut.
Beneath the Surface: Root Care
If your rosemary is dropping leaves or browning tips, the roots may be the culprit. O'Donoghue suggests inspecting roots, which should be firm and pale, and trimming away dark, mushy roots. Repotting with a free-draining mix, such as half standard compost and half grit, sand, or perlite, is essential. Ensuring good drainage is paramount to prevent root rot.
Watering Wisdom
Overwatering is a common pitfall. O'Donoghue recommends allowing the top few inches of soil to dry out completely before watering again, providing a thorough soak, and allowing excess water to drain. This mimics the plant's natural environment and prevents stress.
Sunlight's Embrace
Light is vital for rosemary's well-being. O'Donoghue advises seeking full sun, either outdoors or a south-facing windowsill, for at least six to eight hours daily. Adequate sunlight prevents leggy growth and accentuates woody stems.
Post-Pruning Care
After pruning, Morris Hankinson of Hopes Grove Nurseries suggests feeding with a balanced, slow-release fertiliser, followed by deep watering. Mulching around the base retains moisture, regulates soil temperature, and protects roots, but avoid piling it against stems. While a woody rosemary may not be aesthetically pleasing, it's rarely beyond saving with careful attention and the right conditions.
