When to sow borage?
- Botanical name
- Borago officinalis
- Family
- Boraginaceae
Borage is sown from April to May. It flowers from May to September.
Borage is an annual plant. The edible parts are the leaves and flowers.
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Borage through the year
- sowing
- flowering
In short
Growing conditions
Companions in the bed
Companion planting is tradition and not an agronomic claim. What is recorded is which pairs sources recommend and which they advise against.
Borage at the edge of the bed is forage for the pollinators. It seeds itself on, so leave it the edge and not the middle.
Borage at the edge of the bed is forage for the pollinators. It seeds itself on, so leave it the edge and not the middle.
- “Cited” means the pair is named by one source or two.
Pests and diseases
Listed here is every problem for which the sources name this plant as a host. The problems are not listed in order of how common they are.
Powdery mildew
disease- Signs
- A white, floury coating spreads over the leaves, first on the lower and older ones. The leaf under it yellows and dries up. The fruit stays small, because the plant loses leaf surface.
- Prevention
- Plant resistant varieties, leave an airy spacing and sun, and clear the debris at the end of the season. Unlike most fungi it is not helped by wet foliage, since it spreads in heat and high air humidity, in a dry summer too.
Keep track of your plants with Tendask
Log the task and set a reminder for the next one. Every plant keeps its own history, so there is nothing to guess at.
Sources about the plant: ASPCA Toxic and Non-Toxic Plants, Clemson Cooperative Extension, GBIF Backbone Taxonomy, NC State Extension Plant Toolbox, Royal Horticultural Society, Utah State University Extension, Wikidata. Checked between 14 and 28 August 2026. The problem descriptions also draw on: KGZS, UF/IFAS Extension, University of Maryland Extension, University of Wisconsin-Madison Division of Extension.