Lobelia speciosa 'Starship™ Scarlet' is an upright, clump-forming perennial selected for strong stems and bold, scarlet-red flower spikes that light up the garden from mid to late summer and into early fall. You get a vivid vertical accent that pairs well with other moisture-loving perennials, and it looks especially good when planted in groups for a more continuous block of color.

Plan for a mature height of about 20-24 inches, with a spread around 12-14 inches, so it fits nicely into the front-to-middle of mixed borders. The narrow footprint makes it easy to tuck between mounding companions while still giving the flower spikes room to stand out above neighboring foliage.

Give this lobelia full sun to part shade. In hotter or drier spots, a little afternoon shade helps it stay lush and reduces stress. Consistent moisture is key: keep soil evenly moist, especially during summer heat, and avoid letting the root zone dry out for long periods.

For best performance, plant in rich, well-drained soil that holds moisture, and top-dress with compost to improve water retention. Cut back spent flower spikes if you want a tidier look, and leave the base to resprout; with steady moisture and good light, it will return reliably in USDA Zones 6-10.

Specifications

• Cold hardiness zone: 6-10 (-10 degrees F) - Contact your local extension to confirm hardiness if you are in a fringe zone (we cannot guarantee hardiness in fringe zones)
• Light: Full sun   Part sun
• Mature height: 20-24"
• Spread: 12-14"

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