Lupinus

This group consists of handsome annuals, perennials and shrubs grown for their attractive spikes of pea-like flowers that come in an array of colors. Lupines (as they are popularly called) belong to the Pea family, Leguminosae, and are natives mainly of North America, though some are found in Europe. These plants will grow up to 4 feet high. L. The Chatelaine forms clumps of dark bluish-green palmate leaves, which are divided into oval-lance-shaped segments. The small, pink and white flowers are borne in compact spikes in early summer. L. Inverewe Red has dark green leaves resembling those of the former variety, and dense racemes of small, vivid red flowers in early summer. L. Chandelier has dark blue-green leaves and dense spires of yellow flowers, in early summer. All three of these Lupines described are hardy perennials. L. arboreus, the Tree Lupine, can only be grown in mild climates. This native to California grows into a large bush, 5 or 6 feet high. It produces tons of yellow or white flowers in late spring or early summer.

Pot Cultivation

The Lupines grow best in well-drained, sandy soil that is preferably slightly acidic. Garden soil should be dug deeply and enriched with compost or decayed manure. They should be placed in a sunny or partially shaded position. In deep, rich soil that doesn't dry out in the summer, Lupines will quickly grow into large, handsome plants. The young leaves of these plants are very susceptible to slugs. Deadhead to maintain vigor. Tree Lupines need to be planted in a sunny, sheltered position. They should be pruned every year or else they will become straggly. The best months to prune are February and March. The shoots of the past year's growth should be shortened by one-third or one-half, as may be necessary to maintain shapely bushes and to prevent their crowding other plants. Tree Lupines do not like to be disturbed, therefore they should be set in their final positions while young.

Propagation

Cuttings of non-flowering side shoots may be taken in the spring or early summer. Seeds may be sown singly in 3-inche pots of sandy loam in a cold or slightly heated greenhouse or frame in March. They will be large enough to plant out in May. Many of them will produce small spikes of flowers in late summer. Seeds may also be sown directly outside in July in rows an inch deep and a foot apart. They will bloom the following year.

L. minimus

VARIETIES

• Perennials -
  L. arboreus (Tree Lupine);
  L. cytisoides;
  L. minimus;
  L. nootkatensis;
  L. polyphyllus & varieties Chandelier, Inverewe Red, The Chatelaine.
  
• Annuals -
  L. densiflorus;
  L. Hartwegii;
  L. luteus;
  L. mutabilis;
  L. pilosus;
  L. subcarnosus

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