From my perspective as an oregano plant, light is my food, my clock, and my structural support. When I don't receive enough of it, my very survival instincts kick in. I become "leggy," or etiolated, because I am desperately stretching my stems towards any available light source. This rapid, elongated growth is my attempt to outcompete other plants and reach the sunlight I need for photosynthesis. Instead of investing energy in producing dense, flavorful leaves and strong side shoots, I am forced to direct all my resources into vertical growth. This results in weak, spindly stems with large gaps between the leaf nodes. For you, this looks like a sparse and floppy plant. For me, it's a stressful fight for life.
Your harvesting method directly communicates with my growth centers. If you simply pluck individual leaves from the top of my stems, you are not giving me the signal I need to become bushy. This top-only harvesting allows me to continue my single-minded upward growth. However, when you practice strategic pruning—snipping a stem right above a set of lower leaves or leaf nodes—you completely change my instructions. That cut tells the dormant growth nodes (the tiny buds where leaves meet the stem) further down the stem to wake up and branch out. This encourages me to produce two new stems from that point, creating a denser, more compact form. Regular, mindful pruning convinces me to grow outward, not just upward.
While you might think feeding me rich, nitrogen-heavy fertilizer is a kindness, it often backfires. In my native Mediterranean habitat, I thrive in lean, well-draining, and somewhat rocky soil. High levels of nitrogen, particularly, encourage a frenzy of soft, rapid green growth. This accelerated growth pattern prioritizes stem and leaf production at the expense of structural integrity and essential oil concentration (which gives me my flavor). This results in those weak, leggy stems that cannot support their own weight. I am essentially being pushed to grow too fast with weak, watery cells. A less fertile soil environment encourages me to grow slower, stronger, and to focus my energy on becoming a resilient, compact plant.
It is also part of my natural life cycle for the central, woody parts of my older stems to become less productive over time. As I age, the center of the plant can become woody and bare, while growth continues primarily on the outer edges, contributing to a leggy appearance. This is not a sign of failure but a phase of my growth. This is why periodic, more aggressive renewal pruning or propagation is beneficial. By taking cuttings from healthy, newer growth and rooting them, you allow me to start fresh. A new plant will be inherently more vigorous and compact, resetting the cycle and giving you a bushier oregano specimen.