Hardiness: USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) USDA Zone 8a: to -12.2 °C (10 °F) USDA Zone 8b: to -9.4 °C (15 °F)
Sun Exposure: Full Sun
Danger: Parts of plant are poisonous if ingested
Bloom Color: Blue-Violet
Bloom Time: Late Spring/Early Summer Mid Summer Late Summer/Early Fall
Foliage: Grown for foliage Evergreen Blue-Green Aromatic
Other details: This plant is attractive to bees, butterflies and/or birds Flowers are fragrant Drought-tolerant; suitable for xeriscaping Average Water Needs; Water regularly; do not overwater
Soil pH requirements: 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline)
On Jun 2, 2009, saya from Heerlen Netherlands (Zone 8b) wrote:
Most of the lavendin that is grown for oil in France is
from this cultivar. Very floriferous on particularly long
stems, forming an arc of colour. Its long stems make it also easier for harvesting. Introduced in 1972 by Pierre
Grosso who grows lavendin commercially for oil production in France.
On Nov 20, 2006, Marilynbeth from Hebron, KY wrote:
Beautiful and fragrant Lavender! A joy to grow and smell! Have had 'Grosso; for years and I love it! Looks great in a mixed flowerbed as I have shown in my photos. Sometimes I cut the flowers while still in bloom and they look beautiful added to bouquets! A winner of a Lavender!
On Apr 5, 2005, PurplePansies from Deal, NJ (Zone 7a) wrote:
What a lovely plant.... a beautiful well formed lavender with masses of dense purple lilac flowerheads..... very nice..... Very big lavender on steroids! The more the better! Easy to grow.... mine is in semi acidic soil and thriving.... we also had a somewhat hard winter this year and the plant made it through with flying colors staying evergreen most of the winter.... if you're a lavender lover?.... highly recommended..... :)
On Jul 27, 2003, apprentice from Pismo Beach, CA wrote:
When I first bought some, I had to do some additional shopping, so they stood in the back of my van during the trip. Talk about natural fragrancer--my van smelled so good, I was tempted to just leave them there for another couple days. However, reality took over, and it went into the ground, instead. The Grosso lavender has got to be one of the most beautiful lavender plants around!! Its blue-green leaves almost look surreal against our mulched front yard, and the fragrance that emanates from the blossoms are awesome. I can't wait to dry them and make sachet pillows from them...
On Jan 21, 2003, lupinelover from Grove City, OH (Zone 6a) wrote:
A sterile hybrid, so a very extended bloom period. This variety's flower stalks are rounder than most, so another common name for this is 'Fat Spike'. Outstanding scent that persists when dried.
This plant has been said to grow in the following regions:
Amesti, California Glen Avon, California Lemoore, California Pismo Beach, California New Paris, Indiana Hebron, Kentucky Houghton, Michigan Royal Oak, Michigan Lincoln, Nebraska Highland Heights, Ohio Gold Hill, Oregon Harbeck-fruitdale, Oregon Portland, Oregon East Norriton, Pennsylvania Hershey, Pennsylvania Souderton, Pennsylvania West Goshen, Pennsylvania North Augusta, South Carolina Crossville, Tennessee Knoxville, Tennessee Bridgewater, Virginia Newport News, Virginia Wytheville, Virginia Freeland, Washington