With tall, bloom-spiked stalks, this pea-family perennial thrives in our acidic soil. Common to barren steppes, lupine are a nitrogen-producing powerhouse: Its roots are loaded with symbiotic bacteria that convert atmospheric nitrogen into a form easily absorbed by plants.
Acidic, well-draining soil is the key to colorful abundance. In clay-rich soils, add coarse sand for extra drainage.
Too much spread can occur: Lupine is a self-seeding plant, so harvest flower spikes as they bloom to control seed-pod production.
Count on easy-care lupine for yearly bursts of color requiring very little maintenance.