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Sticky sage

Salvia glutinosa · Lamiaceae

The gardener's calendar

The right move for September

Ideal time to plant sticky 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
Flowering
July to September
Adult size
60 to 100 cm in height
Growth
Moderate
Hardiness
Hardy down to -15°C
Origin
Southern Alps and Balkans
Soil type
Well-drained, fresh

Care

Watering

Keep the soil fresh without excess moisture, particularly during growth and flowering. During dry periods, water regularly but let the soil dry out slightly between waterings. Gradually reduce watering after flowering.

Exposure

Plant sticky sage in a sunny or partially shaded location. It tolerates partially shaded areas well but flowers more abundantly with at least 4 to 5 hours of direct sunlight per day.

Pruning

Cut back the clump in spring (March-April) to encourage a compact, bushy shape. You can also remove spent flowers as they fade to extend flowering. In autumn, wait until the foliage is completely withered before cleaning up.

Fertilizer

A moderate application of balanced fertilizer in spring is sufficient to support growth. Avoid excess nitrogen, which would promote foliage at the expense of flowering.

Soil and planting

Prepare light, well-drained soil, lightly enriched with mature compost. Prefer sheltered locations away from strong winds and ensure water doesn't stagnate in winter, as this plant dislikes excess moisture.

Diseases and pests

Sticky sage is generally robust but can suffer from mildew or rot in very humid conditions. If problems arise, improve air circulation and reduce foliage watering. No major pests threaten this species under normal conditions.

Did you know?

Sticky sage owes its epithet 'glutinosa' to its leaves and stems that are slightly sticky to the touch, due to a fine secretion of glandular resins. This characteristic allows it to regulate its hydration in the dry mountain climate. Its pale yellow flowers, atypical for the genus, intrigued botanists, making it one of the most remarkable sages of the Alps.

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.