Phacelia: varieties, growing and uses
A vacant strip need not stay bare. Phacelia tanacetifolia fills it with finely divided leaves and curled flower clusters where something new keeps opening. You can use the plant as a flower strip or temporary green manure. Decide that purpose in advance: a strip flowering for insects for a long time is cleared at a different point from green manure that must not spread seed.
This image was created with AI from described plant characteristics and growing advice. It shows a possible situation and is not a photograph of a verified cultivar.
- Use
- This selection is intended for flowers and ground cover. No edibility or flavour is claimed for flowers, leaves or seeds.
- Care
- Sow thinly in loose soil and water during establishment. Choose sun and a well-drained spot. Phacelia is not a legume and therefore does not fix nitrogen itself as clover does, for example.
- Harvest and flowering
- Let a flower strip bloom. For green manure, you do not harvest food: mow or cut the crop before ripe seed forms.
Discover varieties and growth habits
This image was created with AI from described plant characteristics and growing advice. It shows a possible situation and is not a photograph of a verified cultivar.
Phacelia tanacetifolia
The familiar lilac-flowering green manure.
Use: This selection is intended for flowers and ground cover. No edibility or flavour is claimed for flowers, leaves or seeds.
Use of the species; this selection has been developed around colour, shape or growing characteristics.View growing and harvesting →Place in my garden
This image was created with AI from described plant characteristics and growing advice. It shows a possible situation and is not a photograph of a verified cultivar.
Angelia
Named green manure cultivar, not a new flower colour.
Use: This selection is intended for flowers and ground cover. No edibility or flavour is claimed for flowers, leaves or seeds.
Use of the species; this selection has been developed around colour, shape or growing characteristics.View growing and harvesting →Place in my gardenThis image was created with AI from described plant characteristics and growing advice. It shows a possible situation and is not a photograph of a verified cultivar.
Phacelia campanularia
Another species with bright blue bells.
Use: This selection is intended for flowers and ground cover. No edibility or flavour is claimed for flowers, leaves or seeds.
Use of the species; this selection has been developed around colour, shape or growing characteristics.View growing and harvesting →Place in my gardenChoose your way to grow
This image was created with AI from described plant characteristics and growing advice. It shows a possible situation and is not a photograph of a verified cultivar.
This image was created with AI from described plant characteristics and growing advice. It shows a possible situation and is not a photograph of a verified cultivar.
Flowering edging
Make flowering the focus.
- Sow a narrow strip in sun.
- Thin where seedlings crowd one another.
- Cut before unwanted seed dispersal occurs.
Ordinary Phacelia tanacetifolia or Angelia.
Temporary green manure
Cover an empty bed between crops.
- Allow sufficient time before the next crop.
- Sow evenly and keep moist during germination.
- Cut before seed ripens and let processed material decompose.
Phacelia tanacetifolia, including Angelia.
Three different choices
Ordinary Phacelia tanacetifolia produces familiar lilac flower clusters. Angelia is an actual named cultivar of that green manure, emphasising crop development rather than a completely different flower colour. Phacelia campanularia is another botanical species with distinct blue bells. Choose the latter as an ornamental and do not treat it as the same agricultural green manure.
Temporarily between two crops
First assess when the bed is needed again. Do not sow a full green manure today if planting cabbage in two weeks. Keep an edge clear for observation and cutting. Remove volunteers promptly if you do not want them among following vegetables.
A flower strip with an endpoint
Use a short strip beside a path rather than the whole bed. Coiled flower clusters reward close observation. Another small sowing can spread interest across the season. Prevent unnoticed overhang above neighbouring low vegetables; space and light still matter.
Improve soil without miracle promises
Green manure supplies organic matter and covers temporarily empty ground. It does not replace soil testing or balanced nutrition for the next crop. Let material break down and examine soil structure before planting. Record the interval between sowing, cutting and the next vegetable in your garden log; this is more useful than a fixed calendar date for every garden.
Scent, flavour and use
This selection is intended for flowers and ground cover. No edibility or flavour is claimed for flowers, leaves or seeds.
Care, cutting and harvesting
Sow thinly in loose soil and water during establishment. Choose sun and a well-drained spot. Phacelia is not a legume and therefore does not fix nitrogen itself as clover does, for example.
Cut down green manure before it sets seed. Give incorporated green material time to decompose before starting the next crop. Do not count on guaranteed winter kill.
Let a flower strip bloom. For green manure, you do not harvest food: mow or cut the crop before ripe seed forms.
Cutting, caring and following the season
Cut down green manure before it sets seed. Give incorporated green material time to decompose before starting the next crop. Do not count on guaranteed winter kill.
Species information and annual cycle
- Space
- Recommended spacing is missing. Check the plant label or seed packet; unknown space does not count as free space.
- Soil
- No pH range supported by sources is included. Test your soil and follow species and variety guidance.
- Season
- An indicative growth estimate is included; actual development still needs checking.
- Care
- Guide advice is available; the automatic species task matrix is not yet complete. Check the plant regularly and plan a task yourself if needed.
What you need
Tick what you already have. The extras depend on how you grow.
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Make it your garden
Save your favourite variety or add it to My garden. Your own observations determine the growth stage; care tasks are based on the species.
Add Phacelia to my gardenExplore more flowersSources and image information
SeedSteps editorial team · checked on 13 October 2026. Flavour descriptions come from the listed sources; ripeness and growing conditions affect flavour. AI images illustrate described characteristics and do not prove cultivar identity.
- World Checklist of Vascular Plants — 4 juni 2026Royal Botanic Gardens, Kew · 2026-10-07
- Phacelia tanacetifoliaRoyal Horticultural Society · 2026-10-13
- Green manuresRoyal Horticultural Society · 2026-10-13
- Phacelia tanacetifoliaApplewood Seed Company · 2026-10-13
- Phacelia ANGELIAP. H. Petersen Saatzucht Lundsgaard · 2026-10-13
- Plants for Pollinators garden plantsRoyal Horticultural Society · 2026-10-13
- Phacelia campanulariaChiltern Seeds · 2026-10-13
- California BluebellApplewood Seed Company · 2026-10-13