General Plant Information (Edit)
Plant Habit: Shrub
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Mesic
Dry Mesic
Soil pH Preferences: Slightly alkaline (7.4 – 7.8)
Moderately alkaline (7.9 – 8.4)
Minimum cold hardiness: Zone 5a -28.9 °C (-20 °F) to -26.1 °C (-15 °F)
Maximum recommended zone: Zone 9b
Plant Height: 24-36 inches
Plant Spread: 36 inches
Leaves: Unusual foliage color
Other: silver-green to grey-green
Flowers: Showy
Blooms on new wood
Flower Color: Purple
Bloom Size: Under 1"
Flower Time: Summer
Suitable Locations: Xeriscapic
Uses: Windbreak or Hedge
Medicinal Herb
Cut Flower
Dried Flower
Suitable as Annual
Wildlife Attractant: Bees
Resistances: Deer Resistant
Rabbit Resistant
Drought tolerant
Salt tolerant
Toxicity: Other: can be allergenic; has the highest oil content of all lavenders; more camphorous than other varieties and not generally considered culinary
Propagation: Seeds: Can handle transplanting
Other info: 'Grosso' is a hybrid with infertile seed; generally propagated with softwood cuttings
Propagation: Other methods: Cuttings: Tip
Other: Cut tender shoots that are around 2-4 in long with around 3-5 nodes. Avoid woody stems. Cut just below the last node.
Pollinators: Hoverflies
Moths and Butterflies
Containers: Suitable in 3 gallon or larger
Needs excellent drainage in pots
Miscellaneous: Tolerates poor soil
Parentage: Lavandula angustifolia x Lavandula latifolia

Common names
  • Lavender
  • Lavandin

Photo Gallery
Location: My garden in Kentucky
Date: 2006-12-30
Location: My garden, Pequea, PA 17565
Date: 2016-07-04
Location: Heathcote Ontario Canada
Date: 2001  July
Lavandula x intermedia'Grosso'  Tall stems for  wands
Location: My garden in Kentucky
Date: 2006-06-17 at 7:49 pm
Evening sun shining on the left side of the plant.
Location: 382 River Road, Pequea, PA 17565
Date: June 18, 2015
Lavandula x intermedia 'Grosso'
Location: My Garden, Washington State
Date: 2017-08-27
Location: My garden in Kentucky
Date: Jul 7, 2005 6:19 PM
Give this Lavender plenty of space

Image Courtesy of Bloomin Designs Nursery Used with Permission
  • Uploaded by Joy
Location: My garden in Kentucky
Date: 2006-06-26
Location: My garden in Kentucky
Date: 2006-07-01

Photo courtesy of Joy Creek Nursery
  • Uploaded by Joy
Location: Raneys Gardens, South Lyon, MI
Date: 2011-07-09
Location: Raneys Gardens, South Lyon, MI
Date: 2011-07-09
Location: Raneys Gardens, South Lyon, MI
Date: 2011-07-09
Location: Raneys Gardens, South Lyon, MI
Date: 2011-07-09

Photo courtesy of Annie's Annuals and Perennials
Location: My garden, Pequea, Pennsylvania 17565
Date: 2017-05-16

Photo courtesy of Singing Tree Gardens Nursery
  • Uploaded by Joy
This plant is tagged in:
Image Image Image

  • Posted by csandt (Lancaster County, Pennsylvania - Zone 6b) on Aug 21, 2015 3:32 AM concerning plant:
    Lavender is a must-have plant for me! I tried growing lavender 'Hidcote", 'Munstead' and 'Augustifolia' at various locations on my windy hilltop before finding 'Grosso', a French cultivar used for its fragrance in perfumes, etc. Sadly, in open, sunny locations, all the 'Hidcote', 'Munstead' and 'Augustifolia' plants died. In a protected area with morning sun, they thrived but grew woody and ugly after a couple of years.

    Then I tried 'Grosso' in the protected location and have been very pleased. It produced a nice mound that did not develop the ugly woodiness of the two other cultivars I have tried. 'Grosso' has survived two severe winters in the protected location, although it did not survive the open, sunny spot.

    I may be butchering lavender nomenclature by calling species cultivars. Please forgive (and educate) me!
  • Posted by Marilyn (Kentucky - Zone 6a) on Jan 24, 2012 7:52 PM concerning plant:
    When I planted Lavender 'Grosso' years ago, I made sure that the soil was well draining, lean, not fertilized, had added lime, and had all-purpose sand mixed in I also added pea gravel and/or small crushed gravel to the top as its mulch.

    I never did fertilize 'Grosso' the whole time I had it. The only reason it's not in my flowerbed anymore is that I decided to plant other flowers in the flower bed.

    I made sure to allow 2 to 3 ft for spacing because it's a Lavender that needs a lot of space to look its best, as you can see in my photos. The photos were taken years after I had planted it and a year before I dug it out.

    During the growing season, as the stems of flowers faded, I'd cut the stems to promote more flowering. Sometimes I'd cut fresh flowering stems to take into the house. The fragrance is wonderful!
Plant Events from our members
carpathiangirl On April 24, 2019 Obtained plant
3 in. start
paleohunter On September 7, 2020 Maintenance performed
paleohunter On September 7, 2020 Cuttings took
» Post your own event for this plant

« Add a new plant to the database

» Search the Lavenders Database: by characteristics or by cultivar name

« See the general plant entry for Lavenders (Lavandula)

« The Lavenders Database Front Page

« The Plants Database Front Page

Today's site banner is by Lucius93 and is called "Ouch!"

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.