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A picture of a Lacy Phacelia

Lacy Phacelia

Phacelia tanacetifolia

Also known as

Blue Tansy, Purple Tansy, Fiddleneck

Photo by mlwh (All rights reserved)

Full Sun
Easy care
Light watering


USDA zone


Minimum temperature

Expected size








3 months to reach maturity


  • spring
  • summer
  • autumn
  • winter

This plant has no fragrance

More images of Lacy Phacelia

A photo of Lacy Phacelia
A photo of Lacy Phacelia
A photo of Lacy Phacelia
A photo of Lacy Phacelia
A photo of Lacy Phacelia

Lacy Phacelia Overview

Phacelia tanacetifolia is a hardy annual from the Boraginaceae family. It is used in many places in agriculture as a cover crop, a bee plant, an attractant for other beneficial insects, and an ornamental plant. Commonly known as a green manure, by the names Purple Tansy, Lacy Phacelia or Fiddleneck. It is planted in vineyards and alongside crop fields, where it is valued for its long, coiling flower clusters of nectar-rich flowers. The blooms open in sequence, giving a long flowering period. It is a good insectary plant, attracting pollinators such as honey bees. Phacelia tanacetifolia is a species in the Boraginaceae (Borage) family known by the common name Lacy Phacelia.

Common problems with Lacy Phacelia

Generally problem free.

How to harvest Lacy Phacelia

If using as a green manure, dig into the soil before it flowers or cut down and compost the foliage.

How to propagate Lacy Phacelia


Sow outdoors in late autumn or germinate in cool temperatures in darkness for the first 24 hrs.

Special features of Lacy Phacelia

Attracts useful insects

It attracts bees and hoverflies (family Syrphidae), which are useful as biological pest control agents because they eat aphids and other pests.

Other uses of Lacy Phacelia

Walls, rock garden, green manure, bees and other beneficial insects for the vegetable garden.

Flowers to Sow Outside in October

Direct sow these during October where you want them to flower next year!

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Flowers - Annuals to direct sow in September

There is still time to direct sow these hardy annuals where you want them to flower next spring.

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