Pinching the tips of your cosmos plants will make them bushier and promote more blooms. Learn how to do it and get additional tips here.⁠ ⁠ When growing cosmos plants for optimal blooming, it's important to pay attention to the timing of pinching out the tops of the seedlings. Once the seedlings have developed three sets of true leaves, which are characterised by their fern-like appearance, it's an ideal time to encourage lateral growth and create bushier plants by pinching out the growing tips

Cosmos Flower Growing Tips