Lavandula intermedia Grosso

Grosso French Hybrid Lavender

Lavandula 'Grosso' is a large growing (30-32" tall x 3-4' wide) French hybrid lavender with dark blue flower spikes in mid-summer. Provides an abundant harvest for lavender wands, sachets and culinary use. Drought resistant/drought tolerant plant (xeric).

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Zones 5 - 10
Deer Resistant
Deer Resistant
Attract Butterflies
Attract Butterflies
Bee Friendly
Bee Friendly
Rabbit Resistant
Rabbit Resistant
Fragrant Flower / Foliage
Extended Bloom Time (more than 4 weeks)
Light Requirements
Full Sun
Full Sun
Annual Rainfall
Drought Resistant / Waterwise
10 to 20", 20 to 30", 30 to 40" (with care)
Bloom Time Summer
Shipping Shipping begins in early September, coldest zones first. Buy now and we'll ship your order at the ideal planting time for your region. Learn More…


30-32" tall x 36-48" wide. Lavandula 'Grosso' is a classic French hybrid lavender grown for its fragrant dark blue flower spikes and vigorous habit. With nice wide gray-green foliage, 'Grosso' is a large grower and blooms heavily providing an ample harvest of flowers for lavender wands, sachets and culinary use. This is an outstanding honeybee plant providing mid-summer flowers after the English lavender finishes flowering in early summer. 'Grosso' has good cold hardiness for a French hybrid and thrives in zone 6 winters in well drained soils.
Associated SKUs
HBL4O31 (Plant - 3.5" deep pot) - Out of stock.
HBL4O51 (Plant - 5" deep pot) - Out of stock.
Common Name Grosso French Hybrid Lavender
Botanical Name Lavandula intermedia Grosso
Zones 5, 6, 7, 8, 9, 10
Light Requirements Full Sun
Flower Color Blue
Mature Height 30-32" tall
Mature Spread 36-48" wide
Bloom Time Summer
Ships As Potted Plant
Planting Time Spring / Summer, Fall
Soil Type Sandy Soil, Average Soil, Low Fertility Soil, Well-Drained Soil
Soil Moisture Drought Resistant / Waterwise
Amount of Rain 10 to 20", 20 to 30", 30 to 40" (with care)
Advantages Deer Resistant, Attract Butterflies, Bee Friendly, Rabbit Resistant, Fragrant Flower / Foliage, Extended Bloom Time (more than 4 weeks)
Additional Information 3.5" Pot size grown by our friends at Perennial Favorites in Layton, UT
Ideal Region Anywhere In The US, Coastal California
Neonicotinoid-Free Yes - Learn More
Ships to Hawaii, Alaska & Canada No

Planting Guides

Tips for Growing Lavender

Lavender are sun-loving plants that thrive in hot weather and grow best in arid climates. Lavender plants will be taller and wider in mild winter, hot summer climates. The same varieties when grown in cold (zone 5-6) winter climates tend to be more compact. Lavender plants require two-to-three growing seasons to reach mature size.

Lavender plants are at their best in the drier parts of the US like the Great Plains, Intermountain West and West Coast (which has a true Mediterranean climate (wet winters and dry summers). The key is to make sure you choose a variety with sufficient winter cold hardiness for your region. (‘Vera’ and ‘Pastor’s Pride’ are among the most cold hardy.) Yet with proper soil preparation, and planting site selection, Lavender can also thrive in moister, more humid climates like the Mid-West, East Coast and Mid-Atlantic states.

  • Plant in full sun with good air circulation.
  • Plant into well drained soil. Compost-enriched garden loam is alright in drier climates, sandy or gravel soil is best in moister climates. Heavy, poorly-drained clay soils will be fatal.
  • Select a raised or sloped bed, or a planting site against a hot wall or along a cement/asphalt walk or driveway where the reflected heat keeps growing conditions hotter and drier.
  • New transplants need regular watering. Don't let the plants get too dry. Supplemental watering can be greatly reduced the second growing season as the plants become established.
  • When using drip irrigation, place the emitter off to the side of the plant, not right on the root ball to avoid overwatering of mature plants.
  • Fertilize once annually in the fall with a top dressing of Yum Yum Mix.
  • Mulch with gravel or pine needles in arid climates. In moister climates mulching with gravel will protect the crown from excessive moisture and soil splashed onto the foliage.

More in-depth guidance for growing and maintaining Lavender plants: Growing Lavender, Lavender Bliss, A History of Lavender, The Bold and the Beautiful: New and Recent Lavender Introductions and Lavender: An Old World Herb That Has It All.

View more Planting Guides, or download our complete Planting Guide for tips on caring for your plants when you receive your order, as well as planting instructions for Perennials, Spring-Planted Bulbs, Fall-Planted Bulbs, Cacti & Succulents, Xeric Plants and more.


Plant Shipping: Buy now and we will ship your order at the ideal planting time for your region. Fall shipping begins the week of September 6, zones 3-4 first. Most plant orders arrive within 3-5 days, or less, of leaving our greenhouses. This prompt delivery is provided without additional express charges.

Grass Plugs & Seed: Most orders ship within 5-8 business days (all zones).

Gardening Goods:All non-plant items ship within 2-3 days.

Standard shipping costs are $4.99 and up, depending on the size of the order.

Make Fast Even Faster: For ‘Rush’ same week delivery, please call customer service at 800-925-9387.

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Q & A

USDA Hardiness Planting Zones

To determine if a plant is sufficiently cold hardy, the USDA created numbered zones indicating winter low temperatures; the lower the zone number the colder the winter.

  • If the coldest winter temperature expected in your area is -15°F (zone 5) then any plants rated zones 3-5 will survive the winter temperatures in your area.
  • If you live in very warm winter areas (zones 9-11) plants with zones 3-4 ratings are not recommended. The lack of freezing winter temperatures do not provide a time for winter dormancy (rest).

Find Your Planting Zone:

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