Potassium, also referred to as potash, helps roses recover when stressed by insect and disease damage, or by extreme weather conditions. A shortage of phosphorous can result in leaf drop, weak flower stems, and buds that won’t open. Phosphorus promotes healthy root development and abundant flower production. Too much nitrogen will result in too much foliage and fewer blooms, while not enough nitrogen results in yellow leaves, stunted growth and smaller blooms. Since a rose’s ability to make flowers resides in its leaves, healthy foliage results in more flowers. Nitrogen encourages healthy, vigorous leaf growth. The primary nutrients (macronutrients) that all plants need are nitrogen (N), phosphorus (P) and potassium (K). Here’s what you need to know to get the most out of your roses. There are many different kinds of fertilizers, so it can be confusing to know how and when to fertilize your roses.
Healthy roses not only bloom better, they are better able to withstand insect and disease problems.
To perform their best, roses need a continuous source of nutrients throughout the growing season.
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