From my perspective as an impatiens plant, the primary reason for my leggy, stretched growth is a simple, desperate need for more light energy. My stems are elongating rapidly and my leaves are spacing out because I am etiolating. This is not a design flaw; it is a survival strategy. I am literally reaching for any available photon. When light is insufficient, the hormones within my stems that regulate growth become unbalanced. The hormones promoting vertical elongation become dominant, causing me to stretch towards what I perceive as a brighter location. It is a taxing process that weakens my structure and diverts energy away from producing the vibrant blooms you admire.
This stretched growth compromises my entire being. My stems become thin, weak, and unable to robustly support the weight of my own foliage and flowers. I become top-heavy and susceptible to breaking in wind or heavy rain. Furthermore, the energy I expend on this frantic growth is energy I cannot invest in developing a strong, bushy framework or a prolific display of buds. My internodes—the sections of stem between leaves—become long and bare, giving me a sparse and unattractive appearance. I am left vulnerable, unstable, and far less capable of fulfilling my purpose: to photosynthesize efficiently and create a spectacular floral show.
Do not be afraid to give me a significant trim. While it may seem drastic, pruning is the most effective way to help me correct my leggy form. By cutting back my longest stems by one-third to one-half their length, you are directly counteracting my stretched growth. Make your cuts just above a set of healthy leaves or a leaf node. This action signals a dramatic shift in my internal hormone balance. It removes the apical dominance—the control exerted by the tip of the stem—and encourages the growth hormones to activate the dormant buds lower down on my stems. This will prompt me to produce new, lateral shoots, resulting in a denser, bushier, and more compact form.
After pruning, please provide me with the conditions I need to thrive and maintain a compact shape. First and foremost, relocate me to a brighter location where I can receive ample, indirect sunlight. Direct, harsh afternoon sun can scorch my leaves, but bright, filtered light is ideal. Secondly, ensure you are pinching me regularly. Simply use your fingertips to pinch off the very tip of each new stem after it has developed a few sets of leaves. This practice, like pruning, continuously encourages branching and prevents any single stem from becoming dominant and leggy again. Combined with consistent watering and monthly feeding with a balanced fertilizer, these actions will allow me to grow into the lush, flowering plant we both desire.