From our perspective, our root systems are relatively compact but require ample space to anchor ourselves and access nutrients. Choose a container that is at least 12 inches deep and has a diameter of 8-12 inches. Most critically, the pot must have excellent drainage holes; we despise having our roots sitting in waterlogged soil, which leads to rot and a swift demise. For our growing medium, we require a lightweight, well-draining potting mix. Avoid heavy garden soil, which compacts in containers and suffocates us. A quality commercial potting mix amended with a handful of perlite or coarse sand is ideal for ensuring we have the perfect balance of moisture retention and drainage.
We are best started from seed directly in the container where we intend to grow, as we develop a taproot that dislikes disturbance. Sow our seeds about ¼ to ½ inch deep in the prepared soil after the last frost date in your area. We need light to germinate effectively, so a light covering of soil is sufficient. Keep the soil consistently moist but not soggy. Under optimal conditions of 60-70°F (15-21°C), we will typically emerge from the soil within 7 to 14 days. Once our seedlings are a few inches tall and have developed a set or two of true leaves, thin us to about 6-8 inches apart. This gives each plant the space and resources we need to thrive and produce our best blooms.
To flourish and produce our vibrant blue, pink, white, or purple blossoms, we demand a full sun position. This means we require a minimum of 6-8 hours of direct sunlight daily. Place our container in the sunniest spot you have; the more sun we receive, the stronger our stems and the more prolific our flowering will be. Our water needs are moderate. We prefer a deep, thorough watering whenever the top inch of soil feels dry to the touch. Water us at the soil level, avoiding wetting our foliage, as this can encourage fungal diseases. During the peak heat of summer, you may need to water us daily. We are somewhat drought-tolerant once established but will perform best with consistent moisture.
We are not heavy feeders. In fact, too much nitrogen will encourage excessive leafy growth at the expense of our famous flowers. A single application of a balanced, slow-release fertilizer mixed into the potting soil at planting time is often sufficient for our entire growing season. Alternatively, you can feed us monthly with a half-strength, water-soluble fertilizer formulated for flowering plants. To encourage continuous blooming from early summer until fall, deadhead our spent flowers regularly. This signals to us to produce more blooms instead of putting energy into seed production. We are largely trouble-free from pests and diseases, especially when our basic needs for sun and well-drained soil are met.
