North America Non-native Plant

Shrubby Restharrow

Botanical name: Ononis fruticosa

USDA symbol: ONFR

Native status: Not native but doesn't reproduce and persist in the wild

Shrubby Restharrow: A Mediterranean Marvel for Drought-Tolerant Gardens If you’ve been searching for a tough, drought-resistant shrub that doesn’t sacrifice beauty for resilience, let me introduce you to shrubby restharrow (Ononis fruticosa). This spiny little character from the Mediterranean might just be the perfect addition to your water-wise garden – ...

Shrubby Restharrow: A Mediterranean Marvel for Drought-Tolerant Gardens

If you’ve been searching for a tough, drought-resistant shrub that doesn’t sacrifice beauty for resilience, let me introduce you to shrubby restharrow (Ononis fruticosa). This spiny little character from the Mediterranean might just be the perfect addition to your water-wise garden – though as always, we’ll explore both the perks and the quirks of this interesting plant.

What Exactly Is Shrubby Restharrow?

Shrubby restharrow is a compact, spiny shrub that belongs to the pea family. Originally from the sun-soaked regions of southern Europe and North Africa, this plant has adapted to thrive in some pretty challenging conditions. The restharrow part of its name comes from its historical reputation for being tough enough to stop a plow – now that’s what I call garden confidence!

The Good, The Beautiful, and The Spiny

Let’s start with what makes this plant a garden standout. Shrubby restharrow produces charming yellow, pea-like flowers that bloom throughout much of the growing season. These bright little blooms are absolutely beloved by bees and other pollinators, making this shrub a buzzing hub of activity during flowering time.

The plant itself typically grows to about 2-3 feet tall and wide, forming a dense, somewhat rounded shape. Yes, it’s spiny – but think of those thorns as built-in deer protection rather than a nuisance. The small, compound leaves create an attractive backdrop for the cheerful yellow flowers.

Where Does Shrubby Restharrow Shine?

This Mediterranean native is absolutely perfect for:

  • Rock gardens and xeriscapes
  • Mediterranean-style landscapes
  • Slopes and areas with poor soil
  • Low-maintenance garden borders
  • Pollinator gardens in dry climates

It’s particularly valuable in USDA hardiness zones 8-10, where its drought tolerance and heat resistance make it a reliable performer when other plants might struggle.

Growing Shrubby Restharrow Successfully

The secret to success with shrubby restharrow is remembering its Mediterranean roots. This plant craves:

  • Full sun: At least 6-8 hours of direct sunlight daily
  • Well-draining soil: It absolutely cannot tolerate waterlogged conditions
  • Minimal water once established: After the first year, natural rainfall should suffice in most areas
  • Protection from harsh winds: While tough, it appreciates some shelter from extreme weather

Planting and Care Tips

Plant shrubby restharrow in spring after the last frost. Dig a hole twice as wide as the root ball but no deeper – you want the crown at soil level. Water regularly for the first few months to help establishment, then gradually reduce watering.

Pruning is best done right after flowering to maintain shape and encourage bushier growth. Don’t worry about fertilizing – this tough customer actually prefers lean soil and may become leggy with too much nutrition.

A Word About Native Alternatives

While shrubby restharrow isn’t invasive and can be a wonderful garden addition, it’s worth considering native alternatives that might provide similar benefits while supporting local ecosystems. Depending on your region, native options might include desert broom, coyote brush, or native lupines. These plants often provide even greater wildlife value while requiring no additional water once established.

The Bottom Line

Shrubby restharrow earns its place in the drought-tolerant garden through sheer determination and cheerful blooms. It’s not the flashiest plant you’ll ever grow, but it’s certainly one of the most reliable for challenging sites. If you’re dealing with poor soil, limited water, or just want a low-maintenance shrub that supports pollinators, this Mediterranean native might be exactly what you’re looking for.

Just remember to wear gloves when working around it – those spines mean business!

Shrubby Restharrow

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Fabales

Family

Fabaceae Lindl. - Pea family

Genus

Ononis L. - restharrow

Species

Ononis fruticosa L. - shrubby restharrow

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA