The Blue Daze plant, Evolvulus glomeratus, is a captivating flowering plant known for its vibrant, true-blue blooms and soft, silvery-green foliage. Native to tropical and subtropical regions of the Americas, this low-growing, spreading plant brings continuous color to gardens. Its compact, trailing habit makes it a popular choice for groundcover, borders, and for cascading gracefully from hanging baskets and containers. Its prolific flowering and ability to thrive in warm climates add a unique splash of blue to various landscapes.
Blue Daze Care Essentials
Light
Blue Daze thrives optimally in full sun exposure, needing at least six to eight hours of direct, unfiltered sunlight daily. This intense light is crucial for promoting robust growth and abundant blue flowers. Insufficient light leads to leggy growth, sparse foliage, and fewer blooms. The silvery sheen on its leaves may also diminish.
Watering
Consistent moisture is generally beneficial for Blue Daze, especially during establishment. It is important to allow the top few inches of soil to dry between waterings to prevent waterlogging. Overwatering is a common issue that can quickly lead to root rot and fungal problems, shortening the plant’s lifespan. While drought tolerant once established, prolonged dryness stresses the plant and reduces blooming. Check soil moisture by hand, adjusting frequency based on climate and whether the plant is in a container or in-ground.
Soil and Potting
Blue Daze prefers well-draining soil. It tolerates various soil types, including sandy or low-nutrient soils, but not soggy conditions. Ideal soil pH is slightly acidic to neutral (5.5-7.0), though it tolerates slightly alkaline conditions up to 7.5. For containers, use a good potting mix with drainage materials like perlite or coarse sand. Ensure pots have adequate drainage holes to prevent water accumulation.
Fertilizing
During its active growing season (spring through summer), Blue Daze benefits from regular fertilization to support prolific blooming. Apply a balanced liquid fertilizer (e.g., 10-10-10 NPK) monthly or every 4-6 weeks. Alternatively, apply a slow-release granular fertilizer once or twice per season. Avoid over-fertilization, especially with high-nitrogen fertilizers, which promote leafy growth over flowers. A fertilizer with higher phosphorus (e.g., NPK 4-14-8) can encourage more blooms.
Temperature and Humidity
Blue Daze thrives in warm temperatures, ideally above 65°F (18°C), and is sensitive to frost. In cooler climates, it’s grown as an annual due to its intolerance for freezing conditions; in USDA zones 9-11, it’s a tender perennial. It tolerates average humidity and adapts to indoor or outdoor environments. Protect from frost in colder areas.
Pruning
Pruning encourages bushier growth, maintains shape, and promotes continuous flowering. Though self-cleaning (spent flowers drop naturally), light trimming enhances appearance. Pinching young tips encourages branching and a compact form. Cut back leggy or overgrown plants to revitalize growth and stimulate new blooms. Deadheading redirects energy to new blossoms, though it’s not strictly necessary.
Planting and Propagation
Plant new Blue Daze nursery plants in spring to allow root establishment before summer heat. For groundcover, space plants 12 to 24 inches apart to accommodate their spreading habit. For containers, ensure adequate space for its trailing nature. Prepare the planting area by loosening soil and ensuring good drainage for successful establishment.
Blue Daze is easy to propagate, primarily through stem cuttings. Take cuttings from healthy, non-woody stems from late spring to mid-summer. Cuttings should be 4 to 6 inches long, with lower leaves removed to prevent rot. Rooting hormone is optional but can encourage faster root development. Plant cuttings in a well-draining rooting medium (e.g., sand, vermiculite, or perlite) and keep consistently moist in bright, indirect light until roots form.
Troubleshooting Common Issues
Blue Daze plants are resilient, but issues can arise. Lack of blooms often stems from insufficient light, as they require ample sunlight to flower. Over-fertilization, especially with nitrogen-heavy fertilizers, can also reduce flowering by promoting leafy growth over blossoms. Increase light and adjust fertilizer type or frequency to encourage more blooms.
Yellowing leaves indicate underlying problems. Overwatering is a frequent cause, leading to soggy soil, root rot, and yellowing foliage. Severe underwatering can also cause leaves to yellow and wilt. Nutrient deficiencies, though less common in well-fertilized plants, might also contribute. Ensure proper watering and drainage to remedy yellowing leaves.
Blue Daze is resistant to most pests and diseases. However, fungal issues like root rot can arise from overly wet or poorly draining soil. Good air circulation helps prevent such problems. Occasional pests like spider mites or aphids might appear, especially on stressed plants. Manage infestations with insecticidal soap or neem oil.