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Phacelia tanacetifolia

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Also known as

Phacelia 'Green Manure', Lacy Phacelia, Purple Tansy, Scorpion Weed, Fernleaf Fiddleneck, Facelia, Tansy Phacelia

Full Sun
Easy care
Light watering


RHS hardiness


Minimum temperature

Expected size








3 months to reach maturity


  • spring
  • summer
  • autumn
  • winter

This plant has no fragrance

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A photo of Fiddleneck
A photo of Fiddleneck
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Fiddleneck 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 Fiddleneck.

Common problems with Fiddleneck

Generally problem free.

    How to harvest Fiddleneck

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

    How to propagate Fiddleneck


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

    Special features of Fiddleneck

    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.