Not to worry, as long as the plant looks healthy. Lobelia flowers are valued for their use as edging plants. Keep plants well watered especially during the mid-summer heat. This plant is notable for having two different growth habits available, and gives wonderful versatility in the garden or containers. It flowers in nonstop waves of brilliant blues, pinks, purples, and white all summer long, and has pretty, dainty foliage. Best offers for your Garden - https://amzn.to/2InnD0w ----- How to Take Care of Lobelia Plants. They can tolerate partial shade and may need it in hotter climates. Height: 20 to 24 inches. An old-fashioned charmer, garden lobelia fits the bill perfectly. Lobelia Cardinalis. Cutting back the plants after the first initial batch of blooms have faded will promote additional flowers. Temperature: The ideal temperature for this plant type is 70 degrees F. Soil requirements: It requires moist, humus-rich soils with a pH of 6 to 7.5 and it must be well-drained. Lobelia grows equally well in the garden and in containers, but does prefer locations with more moisture. You can fertilize with an all-purpose liquid fertilizer ever 3-4 weeks, but it is not absolutely necessary. Lobelia, marked by intense colors and masses of small, tubular blooms, provides interest to the garden all summer. Type: Perennial in zones 6-10. How to Cut Back My Petunias to Make Them Bloom More. Bacopa, also known as Sutera, is another appealing annual that has masses of dainty lilac, pink or white flowers. Most lobelia species grow best in cool weather and will bloom the best in your garden in spring or early summer and in fall. Petunias (Petunia x hybrida) are a favorite annual flower for many gardeners due to … Lobelia is an annual flowering plant which produces small colorful blooms and grows well in garden beds or containers. Lobelia ×speciosa. Lobelia is generally a low maintenance plant. White Petunias, or impatiens will work well and bloom all summer long. Annual lobelia (Lobelia erinus), grown as a perennial in the warm climates of U.S. Department of Agriculture plant hardiness zones 9 through 10, is a bushy, low-growing plant often used in flower beds and hanging baskets. You only need to overcome three steps to know how to grow Mexican heather. How to Prune. Guides will say that you only have to prune your lobelia once a year but of course keep an eye on your plant as it may require more pruning if it's looking untidy. The older types of lobelia cannot tolerate the heat at all, which is why it should be planted in partial shade. Sometimes lobelia temporarily stops blooming in the heat of summer. Also called Cardinal Flower, this eye-catching native perennial is famous for its beautiful red flowers. Lobelia flowers bloom from late spring to late fall with a minimal amount of care. Flowering will resume as soon as temperatures cool down. Dazzling rose-pink blooms are set off by dark bronze foliage. 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