Cardinal Flower or Blue Lobelia Seeds (Lobelia cardinalis / Lobelia siphilitica) Growing Cardinal Flower from seed is pretty easy, and economical. Blue White Foliage. It has, however, been used for medicinal purposes for many years. Germination time is 14 days at consistently warm (70 degrees Fahrenheit) The seeds can germinate at lower temperatures, but it can take quite a long while. Most lobelias can grow in part-shade conditions, though the great blue tolerates more shade than its cardinal flower cousin. They have been thriving in their pots all year, reaching heights of 4-5′, and blooming profusely. Bred to be more heat tolerant than other varieties. How to grow Lobelia erinus The trailing growth habit of the lobelia allows it to cascade down the sides attractively. This flower since 1861 is cultivated. Surface sow, barely covering, and keep moist but not sopping wet. Hardiness Zones. New plants develop in the form of leafy rosettes on the sides of the parent plants. Lobelias are considered to be easy to grow plants. The truly beautiful lobelia will shine in any flower garden. You will know that roots have grown because you will see new leaves on your cutting. Get planting advice, garden design tips and trends, monthly checklists for your area, product specials and more in our weekly newsletter. Attracts Wildlife . Attractive, dark-green to reddish bronze leaves and showy, 3-5' spikes of brilliant red or blue flowers that bloom from late summer to early fall. You can either direct sow your seeds in the spring after all danger of frost or start them indoors 8 weeks before your last frost. Sign up for weekly gardening inspiration and design tips. Lobelia is a great cool-season flower for adding vivid blue to the garden. You can also pinch back plants at any time if you prefer bushier growth. Press the seeds gently into the surface and germinate at a temperature between 15-20°C (6-68°F). Annual bedding lobelias will grow in both full sun or partial shade. Regardless of the type of lobelia you grow, all species grow best in well-draining, but moist to very moist soil. How bumblebees gain entry to lobelia flowers.. erinus. Troubleshooting. The timing depends on the type of pruning. Troubleshooting. Lobelia seeds are extremely small and fine-textured but are easy to cultivate if started indoors eight to 12 weeks before transplanting out – generally, two to four weeks after your last frost date. In midsummer, most will need some shade to keep them blooming, with the exception of those with improved heat tolerance. Growing Lobelia plants in a … It’s easy to divide them. Lobelias tolerate full sun to partial shade, but prefer some shade in hot climates. Because of that, you can space them 1-2′ apart (30-60 cm). For late summer blue blooms these are the ones to choose. inflata (I… More about the newsletter. Most perennial lobelias, including the great blue (Lobelia siphilitica), cardinal flower (L. cardinalis) and their related cultivars maintain an above-ground basal rosette of leaves throughout the winter. Neutral: On Jan 17, 2005, JodyC from Palmyra, IL (Zone … Do not cover. Great blue lobelia (L. siphilitica), also called blue cardinal flower, is another native perennial wildflower that bears long-lasting bright blue flowers. Roots should develop in 2 to 3 weeks. Container combination featuring LagunaÂ® Sky Blue lobelia.Photo by: Proven Winners. Growing Lobelia From Seed. Troubleshooting. Shake the bag to release the seeds. Most annual lobelias are self-cleaning, so you donât need to deadhead them. This herbaceous plant is easy to grow from seed and frequently self-sows. In hotter regions, less sun is preferred to keep them blooming longer. I'm not sure how it got there. Pinch back newly emerging stems when they are about six inches long. Sowing: Sprinkle the lobelia seeds on the surface of a good seed compost and do not cover the tiny flower seeds with anything, the lobelia seeds need light to germinate. They grow along streambanks which are wet year-round. Set the cuttings in a container filled with soil. The tubular blue flowers appear in late summer through early fall, August to October. If blooming slows during the heat of summer, the best way to revive them is to cut them back by as much as one-half to two-thirds, followed by regular watering. Generally growing 2-3 ft. tall (60-90 cm) and spreading 12-18 in. Lobelia species are available in different varieties. Growing Great Blue Lobelia from seed is easy. Annual bedding lobelias will grow in both full sun or partial shade. LagunaÂ® Dark Blue Lobelia erinusPhoto by: Proven Winners. plants) Sun Exposure Full Sun, Medium Sun/Average … Lobelia is a fairly easy plant to grow from seed. Hummingbird havens, garden borders and groundcovers, rain gardens, woodland gardens, spillers in container combinations, pollinator gardens. In early summer, pinch back plants to stimulate the growth of new blossom-bearing branches. This summertime bloomer will continue to produce flowers on up through the first frost. I've owned 2 homes, both of which had shady yards so I've become rather knowledgeable about shade gardening. If you want to overwinter in pots outdoors, no, they will not survive. Season of Interest: Late (July - frost) Main Color: Blue. Lobelia (Lobelia erinus) is a dainty little trailing plant that comes in shades of blue, purple, lilac and white.They are easy to grow annuals that provide a great ground cover or contrast in rockeries, garden edges, pots and hanging baskets. Perennial lobelias will often self-sow given the right conditions and usually bloom the first year from seed. The Great Blue Lobelia will readily reseed itself in your garden so you will always have plenty of plants. High heat can cause lobelia to suffer, but the plants stay in bloom for many weeks in areas with cool nights. So dig in lots of bulky organic matter, such as compost, to improve the moisture holding – especially on free-draining soils. How to Grow Lobelia Plants. General: Great blue lobelia is comparatively easy to grow. How to Grow Lobelia. Lobelia can also be grown from seeds, and clumps of the perennial can be divided to create new plants. Photo by: Age Fotostock / Alamy Stock Photo. Container Gardening Ideas. erinus. Use as a vertical accent in containers, well-watered garden beds, and aquatic gardens. Add in rock gardens, butterfly gardens, or in a deer-resistant landscaping design. Harvesting. Annuals reach a maximum height of about 12 inches. ardinal flower, Lobelia, is a deciduous perennial with narrow lance-shaped glossy green leaves and spires of scarlet summer blooms. The capsules can be collected in autumn, usually October. Dainty bright-white flowers with dark green foliage make this an eye-catching spiller to use in container combinations and hanging baskets, where it will trail up to 2 feet. Great blue lobelia flourishes in moist soil with filtered shade but will adapt to drier conditions with more shade. Lobelia is a great cool-season flower for adding vivid blue to the garden. The Great Blue Lobelia is deer resistant, a real plus in areas like mine that suffer from an over-population of deer. Blue lobelia grows as a wildflower and doesn't usually require fertilizer, preferring organic nutrients from compost. My guess would be it was courtesy of the birds who tend to excrete seeds all over my yard. All Rights Reserved. These plants make great additions in borders, along creeks or ponds, as ground covers, or in containers—especially hanging baskets. Grow your lobelia in a hanging basket and display it on a porch. They attract butterflies and hummingbirds. Can be a little difficult to grow from seed though, so most gardeners buy in 6 packs from the local garden center. The foliage is a handsome rich green to sometimes dark reddish purple. Lobelias are considered to be easy to grow plants. Extremely hardy, low care, and fairly pest and disease-free, Great Blue Lobelia tends to be short-lived, although it may self-seed in ideal growing conditions (without becoming invasive). Both the Cardinal Flower and the Great Blue Lobelia are unsuitable for hanging baskets because of their size and growth habit. Yet are you aware that up on the slopes of Mount Kilimanjaro there are lobelias that grow 20ft tall, their spires of blue and green flowers rising from great rosettes of leaves of tropical wonder. Avoid pruning back or deadheading cardinal flower and other perennials if you want them to reseed naturally. Usually it will just form a rosette of leaves the first year and bloom the second year, but it can bloom first year from seeds if you get an early start. Discover unique garden products curated by the Garden Design editors, plus items you can use to solve problems in your garden right now, and best sellers from around the web. Lobelia siphilitica. Genus: Lobelia Surface sow the seed. This radical pruning will regenerate new growth, and by the time the cooler weather of fall arrives, your plants should be in full bloom again. Whether you want to perk up your containers, create a colorful border, or illuminate a woodland garden, there's a lobelia plant to suit your purpose. The lobelia plant (Lobelia spp.) Photo by: John Richmond / Alamy Stock Photo. After the cuttings have developed roots, you can set them outside in your garden, 8 to 12 inches apart, so that they will be able to grow their rosette of leaves before winter. Harvesting. Lobelia Plant: Tips To Grow And Care For Annual and Perennial Lobelias. A lightly shaded position, or one out of strong, direct sunshine, will ensure plants go on flowering profusely for a long time – especially during very hot summers. Great Blue Lobelia Growing Requirements and Care The Great Blue Lobelia doesn’t require much space, as it will send stalks vertically. Cardinal flower (Lobelia cardinalis): hardy perennial, with red flowers and an upright growth habit; Great lobelia (Lobelia siphilitica): hardy perennial, with blue flowers and an upright habitLobelia erinus 'Laguna': tender perennial, with blue flowers and a trailing habit. These two little plants grow only about 6 inches tall. Perennial type of lobelia (not to be confused with the low-growing, often blue annual types) are magnets for hummingbirds, so they're great for wildlife gardens. Scarlet red flowers bloom from midsummer to early fall on dense, upright spikes. The stalks are cut below the capsules, and placed upside down in a per sack. Water the potting soil. These plants are easy to grow and grow … Great Blue Lobelia plants stay healthier if they are divided every 2 to 3 years. Don't transplant seedlings outdoors until a few weeks after the last frost date. (For spring planting, mix the seed with moist sand and store it in the refrigerator for 60 days before planting. Rather uncommon, this exotic and tropical-looking variety has trumpet-shaped salmon-red flowers with bright yellow and orange throats that hang in clusters on thin red stems. In early summer, pinch back plants to stimulate the growth of new blossom-bearing branches. Plant in full sun to part shade. In hotter regions, less sun is preferred to keep them blooming longer. Developed by plant breeders to stand up better to hot summers than other trailing lobelias Some varieties bloom white or pink. Though planting in spring guarantees enough time for plants to develop a healthy root system by the following winter, lobelia planted during late summer … Although annual types are widely available at garden centers in the spring, you can also start your own plants from seed, sown indoors 8 to 10 weeks before the last spring frost date. Lobelia siphilitica is commonly called Great Blue Lobelia as it has larger flowers than most other blue flowered Lobelia spp. They make up less than 10% of the plant kingdom. Lobelia erinus is a trailing species with masses of purple or blue flowers. Lobelia love the cooler temperatures and reward the homeowner with great looking blooms that are bright and vibrant. is an attractive annual herb with many varieties. She has been associated with Rutgers Gardens for over a decade. It needs a good, fertil… How To Grow Lobelia. Great Blue Lobelia, the blue counterpart of the Cardinal Flower, prefers moist soils and can be found naturally in open, moist shaded woodlands and alongside lakes and streams. High heat can cause lobelia to suffer, but the plants stay in bloom for many weeks in climates with cool nights. Weeds compete with plants for water, space and nutrients, so control them by either cultivating often or use a mulch to prevent their germination. Success! Plant in a potting mix rich in organic matter. Answer: It depends on which kind of lobelia you are growing. With a few comments from Kellie of course. It has fine stems and deep green leaves, which are toothed and roughly oval. Usually grown as an annual; perennial in Zones 9-11. Pinch newly planted lobelia when they recover from transplanting. Propagation by seed: Plant Lobelia seeds indoors early in the spring, or sow directly into the moist soil outdoors after all danger of frost has passed. Here the groundwork of a good drainage pays off (also applies to other flowers). They need a good, fertile, reliably moist soil, that doesn’t dry out in summer. (Do not allow to fully dry out or it starts to get "crispy.") In the spring, you will rewarded with seedlings. Blooms continuously from spring until the first frost. Water regularly to keep the soil evenly moist, especially during hot, dry weather. Lobelia is an easy-to-grow, carefree plant that enjoys cool weather. (30-45 cm), this clump-forming Lobelia thrives in rich , humusy , medium to wet soils in full sun to part shade . as defined by the USDA Plant Hardiness Zone Map; (hardiness zones are not recorded for all Grow Native! General: Great blue lobelia is comparatively easy to grow. A lightly shaded position, or one out of strong, direct sunshine, will ensure plants go on flowering profusely for a long time – especially during very hot summers. 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