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Linaria, Genus, dalmatica, Species,

Genus & species

Balkan toadflax

Plantaginaceae

Balkan Peninsula and eastern Mediterranean

Attracts Pollinators Attracts Butterflies Deer Resistant Drought Tolerant

SunFull Sun

WaterLow · drought-tolerant

HardinessZones 3–8

Overview

Linaria dalmatica, Dalmatian toadflax, is an upright herbaceous perennial in the plantain family, growing 2-4 feet (60-120 cm) tall from deep, creeping roots. The stems are clothed in waxy, blue-green, heart-shaped leaves that clasp the stem. From late spring into fall it bears spikes of bright yellow, snapdragon-like flowers 1-1.5 inches (2.5-4 cm) long, each with an orange-bearded throat and a long downward spur. A single plant can produce half a million seeds and also spreads from its deep, lateral roots, so it forms expanding patches. Native to the Balkans and the eastern Mediterranean, it has naturalized across western North America, where it invades rangeland, roadsides, and disturbed ground and is listed as a noxious weed in many states and provinces. It tolerates cold, drought, and poor soil and is hard to control once its root system is established. L. dalmatica has little garden use and is managed as an invasive rangeland weed.

Native Range

Linaria dalmatica is native to the Balkan Peninsula and the eastern Mediterranean region of southeastern Europe and southwestern Asia. It has naturalized widely across western North America and other temperate regions. It grows on rangeland, roadsides, gravelly slopes, and disturbed open ground.

Suggested Uses

Linaria dalmatica has little or no horticultural use and is treated as an invasive noxious weed across western North America. Its flowers draw bees, but it spreads aggressively and is controlled rather than planted. Land managers target it for control on rangeland and natural areas.

How to Identify

Recognize Dalmatian toadflax by its waxy, blue-green, heart-shaped leaves that clasp the upright stems and its spikes of bright yellow snapdragon flowers with an orange throat and a long spur. The flowers resemble garden snapdragons but are smaller and spurred. The broad clasping leaves separate it from yellow toadflax (Linaria vulgaris), which has narrow, grasslike leaves.

Appearance

Size & Dimensions

Height2' - 4'

Width/Spread1' - 2'

Colors

Flower Colors

Foliage Colors

Fall Foliage Colors

Bloom Information

Bloom Period

~18 weeks

Flowers: May–September

Spring Summer Fall

Flowering runs from late spring into fall, roughly May through September. The yellow flowers open from the bottom of the spike upward over a long season. Round seed capsules form afterward and release flat, winged seeds.

Detailed Descriptions

Flower Description

Yellow with orange throat

Foliage Description

Blue-green

Growing Conditions

Sun Requirements

SunFull Sun

Requires 6-12 hours of direct sunlight daily

• Full Sun: 6+ hours of direct sunlight

• Partial Shade: 3-6 hours of direct sunlight

• Full Shade: Less than 3 hours of direct sunlight

Soil Requirements

pH Range6.0 - 8.0 (Neutral to alkaline)

3579

Soil Types

sand rocky loam clay

Drainagewell drained

Water & Climate

Water Needs

Low

Frost Tolerance

hardy

Drought Tolerance

Drought tolerant when established

Care & Maintenance

Care Guide

Dalmatian toadflax is an unwanted weed rather than a cultivated plant, growing in full sun on dry, coarse, well-drained soils, including gravelly and sandy ground. It establishes on disturbed, open soil, then spreads by seed and by deep, creeping roots that resprout from fragments. It tolerates cold, heat, and drought and persists once rooted. Control is difficult and combines repeated removal, targeted herbicides, and biological control insects, since pulling alone leaves root fragments that regrow. Its deep roots make established stands long-lived.

Pruning

Cutting or mowing before seed set reduces seed production but does not kill the creeping roots. Repeated removal over several seasons is needed to weaken stands. Cut material with mature capsules is removed from the site to limit seed spread.