Bentham’s Broom

Bentham’s Broom: A Lesser-Known California Native Worth Discovering

Meet Bentham’s broom (Lotus benthamii), a charming California native that might not be on every gardener’s radar, but perhaps should be. This perennial herb belongs to the pea family and offers a delightful way to add authentic native character to your Golden State garden.

What is Bentham’s Broom?

Bentham’s broom is a perennial forb—basically a soft-stemmed plant that comes back year after year without developing woody tissue like shrubs or trees. You might also see it referred to by its former botanical name, Hosackia cystoides, in older gardening references. As a true California native, this plant has evolved alongside the state’s unique ecosystems and wildlife.

Where Does It Naturally Grow?

This native beauty calls California home, though specific distribution details within the state are not extensively documented. Like many California natives, it has adapted to the state’s Mediterranean climate and diverse growing conditions.

Why Consider Planting Bentham’s Broom?

Here are several compelling reasons to give this native a try:

• True California heritage: As a native species, it supports local ecosystems and requires less water once established
• Low-maintenance appeal: Perennial nature means it returns each year without replanting
• Authentic native gardens: Perfect for creating genuine California native plant landscapes
• Drought tolerance: Like most California natives, it’s adapted to survive with minimal supplemental watering
• Wildlife support: Likely provides nectar and habitat for native pollinators and insects

Garden Design Ideas

Bentham’s broom works wonderfully in:

• Native California plant gardens
• Drought-tolerant landscapes
• Natural or wildland-style gardens
• Pollinator support plantings

Growing Conditions and Care

While specific growing requirements for Lotus benthamii aren’t extensively documented, you can follow general guidelines for California native herbs:

Preferred Conditions:

• Sunlight: Full sun to partial shade
• Soil: Well-draining soil (most California natives dislike soggy conditions)
• Watering: Regular water during establishment, then minimal to moderate water
• Climate zones: Likely thrives in USDA zones 8-10, matching California’s climate

Planting and Care Tips:

• Plant in fall or early spring for best establishment
• Provide regular water the first year, then reduce gradually
• Avoid overwatering once established—this is a common mistake with California natives
• Little to no fertilizer needed; these plants prefer lean soils

A Note About Availability

Here’s the catch: Bentham’s broom isn’t commonly found in nurseries, and detailed growing information is somewhat limited. This makes it more of a specialty plant for dedicated native plant enthusiasts. If you’re interested in growing it, try contacting California native plant societies or specialized native plant nurseries.

The Bottom Line

Bentham’s broom represents the kind of authentic California native that serious native plant gardeners seek out. While it may require some detective work to source and grow, it offers the satisfaction of cultivating a true piece of California’s botanical heritage. If you can’t locate this particular species, consider exploring other Lotus species native to California—many offer similar benefits and may be more readily available.

For gardeners committed to authentic native landscaping, Bentham’s broom is worth the extra effort to find and grow. Just remember that with native plants, patience and respect for their natural preferences usually pay off with years of low-maintenance beauty.