How tall do Lobelia cardinalis grow?
Cardinal flower is an herbaceous perennial in the bellflower family (Campanulaceae) and native to the eastern United States. It is found in moist locations and may grow 4 to 5 feet tall and 1 to 2 feet wide. Lobelia cardinalis is also known by its common name Cardinal flower, which grows wild in Northern America. In the nursery this plant is cultivated in marshy conditions, forming dark-green leaves which are purple underneath.Cardinal flower is a good native plant for a pollinator garden with moist soil. Butterflies and hummingbirds flock to lobelia’s blooms.Your Lobelia cardinalis has grown tall and floppy because either it’s searching for light, or you have given it lots of liquid fertiliser. Cut it back when the flower dies.
How much space does lobelia need?
Space the plants 8 to 12 inches apart. Add plenty of peat moss when planting and mulch well to keep the soil cool and moist. Protect the plants from deer. Great blue lobelia will usually bloom in the first year. Plant in full sun to part shade. In hotter regions, less sun is preferred to keep them blooming longer. Grows 8 to 10 inches in height. Lobelia is grown as a tender perennial in zones 10-11, but as an annual from zones 2-9.Typical Root Depth 🌱 Blue Lobelia features a shallow root system that typically grows within the top 6-12 inches of soil. This shallow depth influences how the plant accesses water and nutrients, making it essential to monitor soil moisture closely.Get Lobelia To Produce More Blooms Keep your lobelia plant happy and healthy to encourage a long season of continuous flowers. Prune your lobelia regularly and deadhead to remove spent flowers and encourage new growth. This maintenance will help your plant form new buds to extend flowering until the first frost.Lobelia grows and blooms quickly, and can fill in the borders and edges of hardscape and garden beds, as well as being a lovely addition to containers.Best grown as a half-hardy annual, Lobelia seeds need to be sown under glass between January and April for flowering between August and September. Alternatively, the seeds can be sown outdoors during April and June for flowering the following year.
What are common problems when growing lobelia?
Dealing with Common Pests One common issue when caring for lobelia is dealing with pests. These little intruders can cause serious damage if not dealt with promptly. If your lobelia is under assault, you may see signs such as leaves curling or spotted leaves, which are typical signs of pests like aphids or whiteflies. Lobelia is considered toxic for cats and kittens. All parts of the plant are toxic to ingest, especially in large amounts. It is not harmful to come into skin contact with lobelia foliage or flowers.
Is Lobelia cardinalis fast growing?
The fleshy stems grow very slowly and only reach heights of 10-20 cm under water. Lobelia cardinalis is often used in the “dutch planting style“. In this style, plants are bedded in larger groups in linear rows and are cultivated to give the impression of a typical flower garden. When planting lobelia cardinalis mini, it is important to provide it with a nutrient-rich substrate. A fine-grained substrate, such as aquarium soil or sand, works best. Gently press the roots of the plant into the substrate, making sure not to bury the crown.Widely used in Dutch aquariums in so-called plant streets”. In open aquariums it grows above the water surface, where it forms very beautiful scarlet flowers and the leaves regain their colour. Lobelia Cardinalis can also be used in garden ponds.Lobelia cardinalis is moderately hardy – in cold areas, protect with a mulch of straw or chipped bark over winter. Once established, Lobelia cardinalis is trouble free to grow so long as the soil is adequately moist.While Lobelia cardinalis definitely grows better with supplemental CO2 and good lighting, it can also be maintained in a less robust form in a “low tech” tank. It should be noted that in emersed form (such as when it is first purchased) the leaves are dark olive, with a maroon underside.Perennial lobelia will die back at the first frost, dropping leaves and flowers and developing soggy stems. Perennial lobelia can be cut back to the ground at this time and pruned prior to winter.