Answer: Now that the flowers are spent, you can cut the entire flowering spike down. If you do this now, the lupines will produce two new little flowering spikes for a second flush of bloom this season. If you allow the spikes to remain on the plants and produce seeds, the seed pods will burst open when the seeds are ripe and will reseed the garden. So, if you want seeds, leave the plants alone. If you want a second flush of blooms, cut down the flower spike. Next spring, before new growth begins, you'll want to cut away the old foliage and old flower spikes to make way for new leaves and flowers.
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