Dalmatian toadflax (Linaria dalmatica)

Dalmatian toadflax

Also known as: Broadleaf toadflax

Dalmatian toadflax is an invasive weed that can crowd out native and beneficial species of plants. It is a short-lived perennial with upright, yellow flowers. It takes five to six years to eradicate this weed from even small patches of land.

Scientific classification

Species

Dalmatian toadflax (Linaria dalmatica)

Mints plantains olives and allies

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Perennial

Lifespan

Herb

Plant Type

Late spring, Summer

Bloom Time

61 cm to 91 cm

Plant Height

30 cm to 60 cm

Spread

Green

Leaf Color

2.5 cm to 5 cm

Flower Size

Images of Dalmatian toadflax

Distribution of Dalmatian toadflax

Distribution Map

Dalmatian toadflax is a plant with a broad distribution, native to parts of Europe and Asia. On other continents, dalmatian toadflax has been introduced, and its presence is registered in both the northern and southern hemispheres. While dalmatian toadflax is cultivated, it may be regarded as having an impact on ecosystems in certain areas where it is classified as invasive. Given this spread, dalmatian toadflax's adaptability is evident, thriving across diverse environmental conditions.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Roadsides, Rangelands, Fields, Waste areas

Hemisphere Trend Curve

Northern

Sorthern

Weed Control

Dalmatian toadflax is native to Europe and is also found across the majority of the United States and Canada. Originally grown for ornamental purposes but now also found in the wild, dalmatian toadflax competes with native species and the abundance of seeds means it spreads quickly making it a concern when found on grass or farmlands.

How to Control It

The best season to control dalmatian toadflax is in the spring before it forms seed pods. It's crucial to address dalmatian toadflax before it reaches seed maturity to prevent its spread.

Hand pulling: For small infestations, pull dalmatian toadflax out by hand, ensuring you remove the entire root system to prevent regrowth.
Mowing: Cut dalmatian toadflax close to the ground just before flowering to reduce seed production.
Mulching: Cover the ground around desired plants with organic mulch to suppress dalmatian toadflax growth.
Limiting water: Reduce watering in areas where dalmatian toadflax is an issue, as dry conditions can hinder its growth.

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Care Guide for Dalmatian toadflax

Every week

Water

Full sun

Sunlight

5 - 35 ℃

Ideal Temperature

Water: Dalmatian toadflax thrives in moderately moist environments and requires balanced watering, ideally every week. While not drought-tolerant, it can endure short dry spells. Typically grown outdoors, dalmatian toadflax is an evergreen that flourishes in temperate climates with consistent rainfall.

Fertilize: For dalmatian toadflax, fertilization is essential for strong growth and vibrant blooms. Apply a balanced NPK fertilizer monthly during the growing season, using a handful per square meter. Reduce applications in fall and winter, ensuring even distribution to avoid root burn, and water thoroughly afterward.

Pruning: Dalmatian toadflax exhibits tall stems with yellow snapdragon-like flowers. Prune in early to late spring to promote growth, remove spent blooms, and trim weak stems. This enhances airflow, reduces pests, and maintains appearance. Regular monitoring is essential to manage its vigorous growth.

Propagation: Dalmatian toadflax propagation involves seed sowing, requiring treatments like scarification or cold stratification to promote germination. Utilize well-draining soil, maintain consistent moisture, and provide adequate light and warmth. Transplant seedlings carefully to prevent root disturbance during establishment.

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