I'm a bit confused about conflicting information on sowing lupines. One gardening magazine or book stated that the seed needed to be "nicked" at one end and soaked for a specific time frame before planting; another said Mother Nature takes care of all of that when they are outside in milk jugs/containers for the winter months. I'd like to hear from gardeners who have grown lupines what their experiences have been.
Two yrs ago I tried nicking my lupine seeds and germination was poor.
This yr I had excellent germination without nicking.
Im talking Russell variety, and sowed in late spring, so not exactly the same scenario as yours, but from this experience I will not nick any lupine seeds in the future.
Lupines have become one of my very favorite plants!