This lobelia loves the heat.ĭeadheading is not needed to keep lobelia flowering for you, but it does help clean up spent flowers and may trigger a rebloom at a later time. This is truly a versatile perennial for warm winter gardeners. Lobelia tolerates a wide range of soil types from poor to fertile, and also adapts to a wide range of soil pH from acidic to alkaline. ![]() True of most North American wildflowers, fertilizer is not typically needed. If planting in drier well draining soil, keep it consistently moist with drip irrigation and an application of mulch to hold moisture in, plus keep it in the shade to reduce evaporation of the water in the soil. Plant in full sun in Northern cooler climates and when in moist to wet conditions, and by rule of thumb, opt for part shade in hot humid Southern gardens. This tough perennial can even survive brief floodings, so don’t be afraid to plant it streamside or in a wetland area. Now you have two options for enjoying these lovely perennials, a bog garden, wetland or pond edge garden setting, or a well-drained soil garden where it can be kept consistently moist. Starship Blue grows reliably in Zones 6-10, preferring the hot humid summers over the cool woodland climates, so it adapts fairly well into a not-so-wet garden environment. Native to North American where it is found in wetlands, along streams and in dense damp woodlands, Lobelia speciosa has intrigued gardeners for centuries. It is worth the extra effort! Starship Blue Cardinal Flower Lobelia is one of the earliest flowering lobelia in spring. Tending to prefer a very moist to wet habitat, lobelia can be grown in your drier soil with a little care and maintenance from you. speciosa is a knock out with its violet blue 1 to 2 inch flowers on tall spikes and its rosette of basal leaves in a bright green. ![]() speciosa hybrids tend to be short lived, this cultivar of L. One of the few true blue perennials, Starship Blue Cardinal Flower Lobelia is an outstanding example of an improved cultivar.
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