Lacy Phacelia

Basic Information

Common Name: Lacy Phacelia
Scientific Name: Phacelia tanacetifolia
Native Habitat: California and Baja California, as well as parts of Nevada, Oregon, Utah, Arizona, and New Mexico.

History / Discovery / Cultivator

Phacelia tanacetifolia, commonly known as Lacy Phacelia, is a striking annual wildflower native to western North America, particularly California and the Baja California region. Its history is intertwined with the natural ecosystems of these areas, where it has long played a vital role in supporting pollinators and enriching the soil.

The plant was first scientifically described and classified by George Bentham, an English botanist renowned for his work on plant taxonomy, during the 19th century. Bentham’s meticulous observations and detailed descriptions laid the groundwork for our modern understanding of this species. The name “Phacelia” comes from the Greek word “phakelos,” which means “bundle,” referring to the clustered arrangement of the flowers. “Tanacetifolia” refers to the plant’s leaves, which resemble those of the tansy plant (Tanacetum vulgare).

While there isn’t a single “cultivator” who single-handedly popularized Lacy Phacelia, its value in agriculture and horticulture has steadily increased over time. Farmers and gardeners alike have recognized its benefits as a cover crop and a beneficial insect attractant. In agriculture, it’s often used as a green manure, improving soil structure and fertility. Its rapid growth and decomposition add organic matter back into the soil, reducing the need for synthetic fertilizers.

Lacy Phacelia’s widespread adoption is also attributed to its attractiveness to pollinators, especially bees. Beekeepers often plant it near apiaries to provide a rich source of nectar and pollen for their bees. This not only benefits the bee colonies but also contributes to increased crop yields through improved pollination services.

The plant’s aesthetic appeal has also made it a popular choice for wildflower gardens and habitat restoration projects. Its delicate, lacy foliage and vibrant purple flowers create a visually stunning display, attracting a variety of beneficial insects and enhancing the biodiversity of the surrounding area. The plant’s easy propagation from seed, combined with its tolerance of poor soils, has further contributed to its widespread use.

While not specifically attributed to an individual “cultivator,” various seed companies and agricultural researchers have played a role in promoting and distributing Lacy Phacelia seeds, making it readily available to farmers, gardeners, and conservationists. The combined efforts of these groups have solidified Lacy Phacelia’s place as a valuable and versatile plant in both agricultural and horticultural settings. Its origins in the California landscape have led to its adoption as a popular species for use in attracting pollinators and enriching soil nutrients.

Plant Care Summary

Botanical Insights

Adaptations

Lacy Phacelia boasts several adaptations that enable it to thrive in its native environment. Its rapid growth and flowering cycle allow it to quickly capitalize on favorable conditions, especially in areas with short growing seasons. The deeply lobed leaves help to reduce water loss through transpiration, enabling it to tolerate drought conditions. Additionally, the plant’s abundant nectar production attracts a wide range of pollinators, ensuring successful seed production. The non-specific nature of the pollination needs allows the plant to be very successful.

Propagation Methods

Lacy Phacelia is typically propagated from seed. Seeds can be directly sown in the garden in early spring or fall. They require light to germinate, so they should be sown on the surface of the soil and lightly pressed in. Germination typically occurs within 7-14 days under favorable conditions. It can self-seed readily in suitable conditions.

Toxicology

Lacy Phacelia is generally considered non-toxic to humans and pets. While it does not contain any known toxic compounds, some individuals may experience mild skin irritation upon contact with the plant’s foliage, particularly if they have sensitive skin. This is due to the presence of glandular hairs on the leaves and stems that can release irritants. Ingestion is unlikely to cause any serious health problems.

Common Problems

Pests:

• Aphids
• Spider mites
• Thrips

Diseases:

• Powdery mildew
• Root rot
• Fungal leaf spots

Other:

• Yellowing leaves: May indicate overwatering or poor drainage.
• Stunted growth: Can be caused by nutrient deficiencies or insufficient sunlight.
• Lack of flowering: May result from inadequate sunlight or poor soil conditions.

Rarity & Value

Rarity:

Lacy Phacelia is not considered rare. It is relatively common in its native habitat and is widely cultivated as a cover crop and ornamental plant.

Value:

The value of Lacy Phacelia primarily lies in its ecological benefits. It is a valuable cover crop for improving soil health, attracting pollinators, and suppressing weeds. It also has aesthetic value as an ornamental plant in wildflower gardens. The seeds are inexpensive and widely available.