Taming the Skunkbush: A Guide to Propagating Navarretia Squarrosa
Navarretia squarrosa, more commonly known as skunkbush or pincushion plant, is a fascinating wildflower native to western North America. Sporting spiky, deep green foliage and vibrant blue to purple, pincushion-like flowers, it certainly makes a statement in the landscape. Many find its unique, musky aroma—the source of its “skunkbush” moniker—to be surprisingly pleasant.
While its unconventional beauty is undeniable, many balk at the prospect of introducing this wildflower into their gardens. Considered a weed by some, Navarretia squarrosa is known for its ability to readily self-sow. But don’t let that deter you! With a little understanding, you can direct this natural vigor to propagate and control this intriguing plant.
Propagation Methods:
1. Seed Propagation:
- Timing: The optimal time to sow seeds is in the fall, coinciding with the plant’s natural cycle.
- Collection: Harvest seeds from mature, dried flower heads.
- Preparation: No special pretreatment is needed. In fact, the seeds benefit from a period of cold stratification, mimicking natural winter conditions.
- Sowing: Scatter seeds on the surface of well-drained soil. Gently press them in but do not bury them.
- Conditions: Place the seed tray in a cool, shady spot and keep the soil consistently moist.
- Germination: Expect seedlings to emerge in 1-3 weeks.
- Thinning: Once seedlings develop a few true leaves, thin them to provide adequate spacing for growth.
2. Cuttings:
- Timing: Take cuttings in the spring from new growth.
- Selection: Choose healthy, non-flowering stems.
- Preparation: Using sterile shears, cut a 4-6 inch section just below a leaf node. Remove any lower leaves.
- Rooting Hormone: While not essential, dipping the cut end in rooting hormone can improve success rates.
- Planting: Insert the cutting into a well-draining potting mix.
- Conditions: Cover the cutting with a plastic bag or humidity dome to retain moisture. Maintain a warm environment with indirect sunlight.
- Rooting: Cuttings usually root in 4-6 weeks.
Taming the Wild: Tips for Controlled Growth
- Deadheading: Regularly remove spent flower heads to prevent self-seeding and encourage a longer blooming period.
- Container Gardening: Consider growing Navarretia squarrosa in containers to restrict its spread.
- Appropriate Site Selection: Choose a location that mimics its natural habitat: full sun to partial shade with well-drained soil.
Embracing the Unconventional
Navarretia squarrosa may not be your typical garden flower, but its unique beauty, fascinating growth habit, and role in supporting native pollinators make it a rewarding addition to the landscape. By understanding its propagation methods and implementing control measures, you can harness the wild beauty of “skunkbush” and enjoy its unconventional charm in your garden.