Calendula officinalis var. arvensis
Field marigold
Common names: Marigold, Green manure marigold
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Description
The field marigold (Calendula officinalis var. arvensis) is a fast‑growing green manure plant. Its root exudates help control nematodes and reduce soil fatigue. The dense foliage shades the soil, suppresses weeds, and loosens the ground with its roots. Bright flowers attract hoverflies, bees, and flower flies.
Care instructions
Sow the marigold from April to July (weeks 14–30) directly into beds, preferably as a colorful companion crop among vegetables. It germinates quickly and blooms within a few weeks. Cut back the plants before seed set and incorporate the biomass into the soil, or allow a few to self‑seed so they return the following year.
Companion planting
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