Some petunias thrive in hanging baskets due to their variety. Supertunia and wave are outstanding basket-bound petunias. Though expensive, it will be worth it.
Whether you bought a hanging basket of petunias from a garden center or an empty basket to fill, there are some aspects to consider.
Petunias love good soil. Organic, well-draining soil suits petunias. Garden centers use organic-rich potting soil for basket growth.
Sun-loving petunias need at least 6 hours of sunlight per day. Planting petunias in 8+ hours of sunlight is optimal. You may have trouble finding a sunny spot for your basket.
Many hanging baskets need more water than gardens. They dry rapidly on hot, windy days since they're shallow. Many ways exist to check if your baskets are hydrated.
Many plants in one place may hinder growth. Rule of thumb: divide container size by 2. Put 6 plants in a 12-inch basket. Grow 10 plants in a 20-inch basket.
Extreme weather can damage hanging baskets. Choosing a spot protected from wind, severe rain, and hail will help your plant survive the season.