North America Non-native Plant

Madeira Dyer’s Greenweed

Botanical name: Genista maderensis

USDA symbol: GEMA10

Life cycle: perennial

Habit: shrub

Native status: Non-native, reproduces and persists in the wild in the lower 48 states  

Madeira Dyer’s Greenweed: A Mediterranean Charmer for Drought-Tolerant Gardens If you’re dreaming of a Mediterranean-style garden that can handle dry conditions with aplomb, Madeira Dyer’s greenweed (Genista maderensis) might just catch your eye. This charming shrub brings a splash of sunny yellow blooms and silvery foliage to landscapes that need ...

Madeira Dyer’s Greenweed: A Mediterranean Charmer for Drought-Tolerant Gardens

If you’re dreaming of a Mediterranean-style garden that can handle dry conditions with aplomb, Madeira Dyer’s greenweed (Genista maderensis) might just catch your eye. This charming shrub brings a splash of sunny yellow blooms and silvery foliage to landscapes that need a little extra pizzazz without a lot of extra water.

What Exactly Is Madeira Dyer’s Greenweed?

Madeira Dyer’s greenweed is a perennial shrub that typically stays under 13-16 feet tall, though most specimens remain much more compact in garden settings. As its name suggests, this plant hails from the Madeira Islands off the coast of Portugal, making it a non-native species here in the United States. It’s established itself in California, where it reproduces on its own in the wild.

This multi-stemmed woody plant produces clusters of bright yellow, pea-like flowers that are absolutely delightful in spring. The silvery-green foliage provides year-round interest, creating a nice backdrop for the seasonal flower show.

Why Garden with Madeira Dyer’s Greenweed?

There are several compelling reasons why gardeners are drawn to this Mediterranean beauty:

  • Drought tolerance: Once established, this shrub can handle dry conditions like a champ
  • Low maintenance: It doesn’t demand constant attention or pampering
  • Pollinator appeal: Those cheerful yellow flowers attract bees and other beneficial insects
  • Compact size: Perfect for smaller gardens or as part of larger landscape designs
  • Mediterranean aesthetic: Adds authentic charm to Mediterranean-style landscapes

Where Does It Shine in the Garden?

Madeira Dyer’s greenweed works beautifully in several garden styles:

  • Mediterranean and coastal gardens
  • Xeriscape and drought-tolerant landscapes
  • Rock gardens and hillside plantings
  • Mixed shrub borders
  • Container gardens (choose dwarf varieties)

Growing Conditions and Care

This shrub is refreshingly easy to please, as long as you give it what it craves:

Sunlight: Full sun is essential for the best flowering and compact growth habit.

Soil: Well-draining soil is absolutely crucial. This plant despises soggy feet and will sulk (or worse) in waterlogged conditions.

Water: Water regularly during the first growing season to help establish roots, then cut back significantly. Mature plants are quite drought tolerant.

Hardiness: Best suited for USDA zones 9-11, so it’s limited to warmer climate regions.

Planting and Care Tips

Getting your Madeira Dyer’s greenweed off to a good start is straightforward:

  • Plant in fall or early spring for best establishment
  • Space plants according to expected mature size (usually 4-6 feet apart)
  • Water deeply but infrequently once established
  • Prune lightly after flowering to maintain shape
  • Avoid heavy fertilization, which can reduce flowering

A Word About Native Alternatives

While Madeira Dyer’s greenweed can be a lovely addition to appropriate gardens, consider exploring native alternatives that provide similar aesthetic appeal while supporting local ecosystems. California native options like ceanothus species, manzanitas, or native salvias can offer comparable drought tolerance and visual interest while providing better habitat for local wildlife.

The Bottom Line

Madeira Dyer’s greenweed can be a delightful addition to the right garden setting—particularly if you’re creating a Mediterranean-style landscape in a warm, dry climate. Its cheerful flowers, drought tolerance, and low-maintenance nature make it appealing to gardeners who want beauty without the fuss. Just remember to balance your plant choices with native species that support your local ecosystem, and you’ll have a garden that’s both beautiful and environmentally conscious.

Madeira Dyer’s Greenweed

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

Genista L. - broom

Species

Genista maderensis (Webb & Bethel.) Lowe - Madeira Dyer's greenweed

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