I heard from a gardener in Newfoundland once who had planted russell hybrids 30 years back, and had been saving the seeds every year. Each year he planted them and new colours and variations arose. Some he really liked but was never to see again. They settled finally, after 30 years, on mainly blue and white. Often this is referred to as scree and contains pebbles and sand.
Lupins grow best in neutral to somewhat acid soils.
Rich soils are to be avoided. Also cutting away the flowering stems before seed production finishes will add to the life of this plant. Suggest everyone download this program. I was wondering if you had any information on the lupine, Lupinus angustifolius. Charlieo L. angustifolius is an annual and grows to about 20 inches tall.