How to Prune Lupine

Overview

Old-fashioned lupines, or Lupinus arboreus, are easy to grow. Established plants can be expected to produce large, showy spikes that emerge in early summer for years to come. They're tall and impressive, and attain a mature size of up to 3 feet tall and 3 feet wide. Nearly carefree, lupines will benefit from a little pruning during the growing season.

Step 1

Deadhead lupine flowers as they fade. This will encourage a second flush of blooms later in the season. Use sharp, clean shears or clippers to cut the spent flower stalk back to the first set of healthy leaves directly below the flower.

Step 2

Choose a blooming stalk on each plant to be allowed to remain for seed production, if you wish. These plants will easily reseed themselves from spent flowers left on the plants.

Step 3

Use sharp, clean pruning shears or clippers to cut the entire lupine plant back by one-half in early spring.

Step 4

Continue watering lupine plants until they begin to die back in midsummer. This will prolong the lush appearance of the foliage.

Step 5

Take stem cuttings in late summer when the weather begins to cool, if desired.

Things You'll Need

  • Sharp, clean pruning shears

References

  • Garden Hobbies: How to Grow Lupine
  • Yerba Buena Nursery: Basic Pruning & Deadheading
  • Wiseacre Gardens: Lupine Quick Reference
Keywords: lupine, Lupinus arboreus, how to prune lupine

About this Author

Axl J. Amistaadt began as a part-time amateur freelance writer in 1985, turned professional in 2005, and became a full-time writer in 2007. Amistaadt’s major focus is publishing material for GardenGuides. Areas of expertise include home gardening, horticulture, alternative and home remedies, pets, wildlife, handcrafts, cooking, and juvenile science experiments.