For urban gardeners, sunny planter boxes are precious real estate. Choosing flowers that bloom profusely and for an extended period maximizes color and impact. The key to long-lasting blooms in containers is selecting sun-loving, heat-tolerant, and often drought-resilient varieties.
Leading the list are several standout performers. Geraniums (Pelargoniums) are classic for a reason. They thrive in full sun and heat, blooming continuously from spring until frost with minimal deadheading. Modern Petunias, especially the Supertunia or Wave varieties, are flowering powerhouses. They cascade beautifully over edges and bloom non-stop without the need for pinching off spent flowers.
For a more structured form, Lantana is exceptional. This tough plant laughs at heat and drought, producing clusters of cheerful flowers that attract butterflies all season long. Similarly, Calibrachoa (Million Bells) offers a profusion of small, petunia-like flowers that are self-cleaning, meaning they require no deadheading.
Don't overlook perennials suited for containers. Coreopsis and Salvia (like 'May Night' or 'Hot Lips') provide weeks of vibrant color, are drought-tolerant once established, and often attract pollinators. Verbena, particularly the trailing types, spreads rapidly and covers itself in clusters of flowers.
To ensure the longest bloom time, pair your plant choices with a quality potting mix, ensure adequate drainage, and implement a consistent feeding schedule with a balanced, water-soluble fertilizer every two weeks. Regular watering is crucial, as containers dry out faster than ground soil. With these resilient flower choices and proper care, your sunny urban planter boxes can become a long-lasting oasis of color.