Mixed Lobelia


Mixed Lobelia, a plant of the Campanulaceae family, is a common flower found in landscapes around the nation. Mixed Lobelia is easy to grow and has many uses, making it a perfect plant for both beginners and experienced gardeners. With proper care and gardening techniques, you, too, can grow stunning mixed Lobelia.

Plant Type

Mixed Lobelia is used in planters, as bedding plants, in hanging baskets and in window boxes. Mixed Lobelia is a cool-weather plant that can be used for most of the winter months in the Southern states, where hard freezes are uncommon.

How to Plant

After choosing a site or planter to grow your mixed Lobelia, fill the planter with a fertile, well-draining potting soil. Dig a small hole twice the size of the root system of the mixed Lobelia. Place the plant in the hole so that the lowest set of branches is just above ground level. Fill the hole back in with potting soil, and secure the mixed Lobelia by firmly pressing the soil around the roots. After planting, water the plant thoroughly and continue to water as needed. Do not allow the soil to dry out between watering or to become soggy.

Growing Conditions

Mixed Lobelia is a cool-weather plant and is hardy to zone 10. It requires partial to full sun and moist soil. Do not allow the soil to become dry between watering. Fertilize mixed Lobelia once a month at recommended strength using a liquid fertilizer for flowers. The optimal pH level is 5.2 to 6.0 to maintain healthy, vibrant blooms.


Mixed Lobelia is propagated by seeds only. Always use fresh, viable seeds purchased from a reputable source to ensure healthy plants. To grow mixed Lobelia from seed, sow seeds in a sterile potting mix indoors. Cover them lightly with soil and water thoroughly. Keep the soil moist but avoid soggy conditions, which will promote diseases and fungi. Transplant seedlings to a sunny location with moist soil after they are 6 weeks old. Maintain proper growing conditions for healthy growth.


Mixed Lobelia requires very little pruning. The only time pruning is necessary is when the appearance of dead blooms become unattractive. To maintain vibrant color, deadhead to promote new growth and abundant blooms. Mixed Lobelia can be pruned as needed to keep a desired shape or size. Avoid overpruning, which will reduce the number of blooms.

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About this Author

Stephanie Manning started her writing career in 2007. She writes for a number of online publishers, including eHow and GardenGuides. She obtained certifications in horticulture, business and nursing from the Walton Career Development Center.