Herb of the Month: Lavender (Lavandula sp.) Part 1

March’s herb of the month is lavender.

grosso lavender plants

This growing information is for Grosso lavender (the variety that I planted in my front garden last year), but other lavender should have similar growing requirements. Grosso lavender is hybrid of cold-hardy English lavender (Lavandula angustifolia) and heat-tolerant Portuguese Lavender (L. latifolia). It is the primary commercial variety for the production of lavender oil.

Grosso Lavender Care

Size: The Grosso variety of lavender can get up to 2.5 feet (76 cm) tall and wide.

Water Requirements: This lavender prefers soil that is kept between dry and moist.

Soil Requirements: Grosso lavender grows best in neutral to slightly alkaline soil that is well drained.

Light Requirements: Grosso lavender does best in full sun.

Temperature Requirements: This lavender grows well in USDA zones 5 to 8, though may not survive the winter if the temperature gets below 0F and there is no snow to insulate the plant.

Nutrient Requirements: Lavender actually prefers a soil with somewhat low fertility.

Pruning: For continued blooming, remove faded flowers. About every three years, prune back to 8 inches (20 cm) tall in the spring.

Pests: This lavender is susceptible to root rot and leaf spot.

Blooms: The blooms of this lavender are lavender in color and very fragrant. Blooms appear from June to August.

Sources

Missouri Botanical Garden
Pantry Garden Herbs – Lavender, Grosso 
Mother Earth News – Herb to Know: Lavender ‘Grosso’ Plant 

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