Double-flowered varieties are among the most popular because their blossoms form rich layers of petals. They often resemble peonies in shape and make a real statement in the garden. Thanks to their volume, they are perfect for vases, where just a few stems can create a beautifully full bouquet. This type of bloom can be found in many popular species. Double-flowered tulips, for example, are very well known for brightening up empty flower beds early in spring. If you're not sure how to get them to bloom successfully, check out our guide on how to grow tulips. During the summer months, other species take over the relay. Double-flowering is quite common, especially in dahlias, offering a wide variety of shapes and colors. For a rich autumn harvest, you just need to master the basics of how to grow dahlias so the plants can bring you joy until the first frosts.