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Sweet vernal grass

Anthoxanthum odoratum · Poaceae

The gardener's calendar

The right move for September

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

JFMAMJJASOND Planting

ID card

Family
Poaceae (grasses)
Foliage
Deciduous, light green
Flowering
April to June
Adult size
30 to 60 cm in height
Growth
Fast
Hardiness
Very hardy (down to -20 °C)
Origin
Western and central Europe
Soil type
Well-drained, rather fresh

Care

Exposure

Sweet vernal grass prefers a location in full sun or partial shade. However, it tolerates less bright areas, with reduced vigor. Place it in an airy spot to encourage harmonious growth.

Soil

This grass appreciates well-drained, fresh and moderately rich soils. It adapts to a wide range of pH levels and even tolerates slightly acidic soils. Avoid permanently waterlogged or overly wet terrain.

Watering

Water regularly during establishment (first few months). Once established, sweet vernal grass is undemanding and tolerates short dry periods. In hot, prolonged summer conditions, moderate watering maintains better form.

Mowing and cutting

Mow or cut sweet vernal grass in late winter or early spring, before new growth appears. This operation rejuvenates the clump and removes dead foliage. An annual pass is sufficient to maintain good density.

Fertilization

Sweet vernal grass is not greedy for fertilizer. A balanced fertilizer application in spring is sufficient. In natural meadows, it generally requires no additional feeding.

Health and pests

This grass is very resistant to diseases and pests. No major problems are reported. Good air circulation and adequate drainage prevent any risk of fungal rot.

Did you know?

Sweet vernal grass owes its scientific name Anthoxanthum to its spikelets rich in coumarin, a compound responsible for its fresh hay aroma that is particularly intense during mowing or drying. This plant was historically highly valued in the traditional hay of alpine meadows, where it imparted a highly sought-after flavor to cheese.

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.