This section is from the book "The Gardener's Monthly And Horticulturist V21", by Thomas Meehan. See also: Four-Season Harvest: Organic Vegetables from Your Home Garden All Year Long.
A correspondent writing from Winnipeg, Manitoba, praises it for its extreme hardiness. He says in the past winter with a temperature of 45° below Zero, and the snow blown from the trees, young plants of it were entirely uninjured. In this part of Pennsylvania, it is in full bloom early in May. I saw a bush about three feet high covered with its deep yellow pea-shaped blossoms.