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Lavandula x intermedia 'Grosso'

Pronunciation: luh-VAN-dyoo-luh in-ter-MEE-dee-a
Family: Lamiaceae
Synonym: Lavandula 'Dilly Dilly'
Common Name: Grosso Lavandin
Cultivar: Grosso
Plant Type:
  • herb
  • trees, shrubs
  • perennial
Height to: 20in (51cm)
Width to: 20in (51cm)
USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
Sun Exposure:
  • full sun
Bloom Season:
  • early summer
  • mid summer
  • late summer
Bloom Description: Grosso Lavandin (Lavandula x intermedia) bears spikes that are 4 to 8 inches (10-20cm) long and have very large, dark violet flowers
Soil Type: Moderately fertile, well drained soil
Plant Perks:
  • Medicinal
  • Fragrant
  • Dry Flowers
  • Rock Garden
  • Container Gardening
  • Cut Flower
Pests and Diseases: Fusarium root rot and leaf spots
Propagation: Sow Grosso Lavandin (Lavandula x intermedia) seed in containers in cold frame in spring, or layer or take semi ripe cuttings in summer
Native to: Garden Origin
Winter Sowing Zones: Zone 5-8
Notes for Identification:

Grosso Lavandin (Lavandula x intermedia) is a rounded shrub with branching stems bearing oblong to lance shaped to almost spoon shaped, aromatic, gray-green leaves, 1 1/2-2 1/2in (4-6cm) long, covered in fine, silver-gray hairs. Grosso is very diseases resistant.

Care: Prune in early spring, then lightly as needed to keep shape, after flowering.


Source: Various sources including The American Horticultural Society A to Z Encyclopedia of Garden Plants and the USDA

USDA Heat Zones (days above 86ºF):
  • 30 to 45 days ZONE 5
  • 45 to 60 days ZONE 6
  • 60 to 90 days ZONE 7
  • 90 to 120 days ZONE 8
Seed photo: 0
Seed Label: 0
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