Grosso Lavender

code: 1242
Long-blooming and highly fragrant, ‘Grosso’ Lavender is famed throughout the world as the one most often grown for use in perfume making. It’s also very showy, with large and spiky dark purple blooms set against silver foliage. Blooms form on purple bracts (as opposed to the more common green) making for a richly colorful appearance in the garden and when dried for crafts. (Lavandula x intermedia)

Plant Information

24-30″ tall x 24-30″ wide ‘Grosso’ lavender is a French hybrid lavender known and loved for its richly fragrant flowers atop long, slender stems. ‘Grosso’ flowers, sometimes called “Lavandin,” are some of the best for use in perfumes, sachets, and culinary projects, including specialty cocktails. This lavender has a somewhat loose, open growing habit. Its clouds of purple-blue blooms add depth and movement to perennial gardens and landscape beds. Pollinators love it, but deer and rabbits avoid it, so it’s a good choice if wildlife tends to snack on your flowers. Plant in areas with well-draining (including rocky or poor) soils that receive at least six hours per day. Do not mulch soil and leave room between plants for good air circulation. Cut back in spring once new growth appears. Harvest stems for drying just before flowers open.

Success with Lavender:

Originating in the Mediterranean, lavender prefers hot sunny days, dry air, and non-enriched, well-drained soil. While that’s great news for those gardening in the West, nowadays lavender can also be successfully grown in higher-humidity areas of the East and Pacific Northwest very successfully by remembering its basic needs. Be sure to pick a variety that is matched to your area. Depending upon your location and your desired use, there are lavenders for almost any setting. Next, follow the four basic elements to ensure lavender success:

1. SUNLavender loves sun. Plant them in a sunny location where there is plenty of air circulation. Six to eight hours of sun is best, but some afternoon shade is fine in the hotter climates of the Southwest.
2. AIRGood air circulation is essential, especially in areas of high humidity. Lavender is not fond of damp, still air, which makes it prone to root rot. In humid areas, plant them with ample spacing, keeping in mind the mature size of your plant when in bloom and allowing for a bit extra space for good circulation.
3. SOILWell-drained soil. This is perhaps the most important factor in success with lavender. One rule of thumb from is that the soil should be loose enough to dig with your hands, and not cake-like. You can add sand or small gravel to recreate this consistency if your soil is too compact. In areas where drainage may be a problem, mound the soil up to create a raised row or stand-alone mound.

In humid areas especially, a 1-2” mulch of pea sized gravel or white sand will do two things – it will help improve drainage, and it will reflect heat and light back up into the plant. More heat = more fragrant blooms! If you use a weed barrier, make sure it is breathable so the soil can drain and the roots can breathe. Gardeners struggling with growing lavender successfully in humid areas are encouraged.

4. WATER During the first year of your lavender’s growth it needs to establish a good root system. It will require regular watering (unless you’re experiencing healthy rain fall). Starting in the second year, your lavender will need less water, as it becomes the water-thrifty plant you’re hoping for, but to get there it needs to grow deep roots in year one. By the end of year three it will have reached its mature size and shouldn’t need any extra water. If water is needed, water in the morning, and deeply, to help root growth. A mature lavender plant is happy with only 9-12 inches of rain per year, but remember, with the right variety and good drainage lavender can thrive with more water.