Phacelia tanacetifolia
Also known as tansy-leaved phacelia, this annual native to California has earned a prime place in European organic vegetable gardens. Sow it and, in just a few weeks, it transforms into a dense carpet topped with blue-mauve flower spikes literally buzzing with bees.
Characteristics:
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Lightning-fast growth: from sowing to flowering in just a few weeks, making it a highly responsive green manure.
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Suppresses weeds: its rapid, dense growth naturally limits their development.
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Unrelated: belonging to none of the major vegetable families, it fits into all crop rotations without any risk of sharing diseases with neighboring crops.
Sowing advice:
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Exposure: sunny; it thrives in full light for abundant flowering.
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Soil: all types of soil suit it, even poor, stony, or calcareous soils — this is one of its major advantages. It requires no fertilization and tolerates drought well once established.
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Method: sow directly in place by broadcasting, in spring or September, then rake lightly to cover the seeds: they germinate better in darkness. No pots and no pre-soaking. See how to sow your seeds.
Care advice:
- No special care is required. Mow and leave in place or lightly dig under before the plants set seed if using it as green manure.
Beneficial combinations:
- Sown along the edge of a vegetable garden or orchard, it attracts pollinators to neighboring crops when they are flowering.
- It combines well with leguminous green manures such as white clover or white mustard. Our complete guide: sowing green manures.
Benefits for biodiversity:
- Its blue flowers are among the most attractive to bees, which produce a renowned and highly aromatic honey from them.
- It also attracts hoverflies, whose larvae are formidable predators of aphids, as well as small beneficial wasps. See vegetable combinations in the garden.
Harvesting your own seeds:
Let the browned flower spikes dry on the plant, then rub them or shake them over a bag to release the seeds. Phacelia readily self-seeds if allowed to set seed. See storing your seeds.
Commitment to Quality: at SemiSauvage - Permaculture, we grow and select our seeds with respect for living things as our guiding principle. Based near the Volcanoes of Auvergne, we choose reproducible, non-hybrid varieties, tested for their germination rate, carefully sorted and packaged, without any chemical treatment. Our belief: to give gardeners back the ability to resow, year after year, seeds that truly belong to them.
Enrich your vegetable garden while promoting biodiversity with these phacelia seeds.
