6 hours of direct sunlight daily is mandatory. Insufficient light leads to "leggy" growth and fewer flowers. Watering Regimes: Petunias are drought-tolerant but prefer well-drained soil. Containers and hanging baskets may require daily watering during peak summer heat. Pruning & Trimming: Mid-season pruning (cutting back about 20% of the branches) prevents the plant from becoming "leggy" and stimulates new growth and fresh buds. 3. Nutritional Support Continuous blooming is energy-intensive. Gardeners often use supplemental nutrients to bolster performance: General Fertilizers: High-energy plants benefit from regular feeding. Some growers suggest using Coffee Grounds as a natural nitrogen source. Specialty Additives: Epsom Salt: Provides magnesium and sulfur to promote lush growth and greener leaves. Baking Soda: A monthly alkaline tonic (1 tbsp per 2 quarts of water) is sometimes used to encourage longer-lasting blooms. 11 sites Petunia Care - Plant Addicts Sep 8, 2021 —
To encourage petunias to bloom throughout the season: petunia blooming season
Petunias have relatively shallow root systems that dry out quickly, especially in containers. 6 hours of direct sunlight daily is mandatory