Last updated on May 16th, 2019
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Growing Lupins Guide. Lupin flowers are some of the most breathtaking of colours. They have stiff, erect spikes from which flowers are produced and the foliage emerges horizontally. The flowers are very similar to flowers you would find with sweet peas insofar as they grow in densely packed groups the colours for which range from pink to white, deep blue, purple, even yellow.