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Whorl sage

Salvia verticillata · Lamiaceae

The gardener's calendar

The right move for September

Ideal time to plant whorl sage: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.

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ID card

Foliage
Deciduous or semi-evergreen depending on climate
Flowering
July to September, violet or purple flowers arranged in whorls
Adult size
12 to 24 inches tall, 12 to 16 inches wide
Growth
Fast
Hardiness
Down to 5°F, cold-resistant
Origin
Central and Mediterranean Europe
Soil type
Well-drained, tolerates poor and dry soils
Exposure
Full sun to partial shade

Care

Exposure

Whorled sage prefers full sun for abundant flowering and dense foliage. It tolerates partial shade reasonably well, though the growth will be less compact. Avoid overly shaded areas that reduce fruiting and plant viability.

Watering

Water regularly during the growing season (spring-summer), especially during prolonged dry periods. Once established, this plant is very drought-tolerant and requires only moderate watering. Avoid excess moisture that could cause root rot.

Soil and drainage

Whorled sage adapts to most soils, particularly lean and chalky substrates. Excellent drainage is essential: add sand or gravel if your soil is heavy or clay-based. Rich organic matter is not necessary.

Pruning and maintenance

Prune lightly after flowering to maintain a compact shape and encourage branching. Cut back in spring to rejuvenate old clumps and prevent sprawling. Deadhead regularly to extend the flowering period.

Fertilizer

Fertilizer is generally unnecessary on average-quality soil. A very modest application in spring can be beneficial on poor soil, but excess nitrogen promotes foliage at the expense of flowers.

Diseases and pests

Whorled sage is robust and rarely affected by disease. Watch for powdery mildew in humid or enclosed conditions: ensure good air circulation and maintain proper drainage. Pests are uncommon; aphids may occasionally colonize new growth early in the season.

Did you know?

Whorled sage owes its botanical name 'verticillata' to the distinctive arrangement of its flowers in whorls (regular tiers around the stem), a characteristic feature of the Lamiaceae family. Historically, wild sages were long used in traditional European herbalism for their antiseptic properties, and some species remain cultivated for this use today.

Where to buy it

Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.

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Tips generated and checked by Viridia — adapt them to your local climate.