Grow Lavender in Acid or Clay Soil

Updated on August 1, 2017
Dolores Monet profile image

An avid gardener for over 40 years, Dolores has landscaped for private clients and maintained one client's small orchid collection.

Lavender Bloooms in the Garden

Source

I love lavender - the delicate foliage; the long, thin stems topped with blue or purple flowers; the way the blooms appear as a mist of blue when viewed from a distance; the lazy loitering of honey bees among the blooms. The fresh, clean scent of lavender is delightful and remains with the dried flowers long after cutting.

For years, I fought a battle with lavender in my back yard. The soil is chunky with clay and generally acidic. Drainage is poor and in late winter and early spring, part of my yard looks like a swamp.

But with a bit of thought and creative planting, I am pleased to say that I have 3 lavender plants that have survived through 4 winters (including a major blizzard) and several soggy springs.

If you want to grow lavender in clay or acid soil in a yard that retains way too much moisture, read on...

Create a Micro Climate for Lavender

We all basically understand the climate of the area in which we live. But there are variations in a climate, and small variations around our own homes. Plants that survive in the sheltered southern exposure of the house might perish in the cold winter winds on the north side of the house.

So it is with lavender. In order to offer lavender a happy home in which it will thrive, consider its needs:

  • bright sunlight
  • dry, well drained soil
  • alkaline soil

Plant lavender in a spot where it will receive full sun (6 - 8 hours of sunlight a day)

To avoid root rot from lingering moisture, build up a bed to lift the lavender garden slightly above the level of the yard. Make sure that the raised bed is well drained.

A rock garden works well with lavender. If the lavender is elevated, it will dry out more quickly during wet seasons.

Another method is to plant the lavender in a southern exposure under the eaves of the back porch. Sun still shines on the plant, but there will be less rainfall and puddling.


Create Drainage to Avoid Root Rot in Lavender

Plant lavender late spring or early summer after the soil has warmed up.

  • If the soil is full of clay and you do not want to build a raised bed or rock garden, dig the planting hole at least twice as deep and twice as wide as the potted purchased plant.
  • Fill the bottom of the hole with limestone gravel.
  • Add a layer of garden soil mixed with compost, and sand. Set the plant on a third layer of gravel and turkey grit or sand. (Turkey grit is ground granite)
  • Gently remove lavender plant from the pot and back fill the hole with the garden soil mixture. Allow the top of the soil in the pot to protrude 1 inch above the soil line.
  • Mulch with limestone gravel and turkey grit.
  • Do not over water.





Lavender Needs an Alkaline Soil

Lavender needs an alkaline soil of about 6.5 to 7.5 pH and will not thrive in an acid soil.

The addition of limestone gravel adds the alkalinity to the soil that lavender needs to thrive.

If you don't want to use gravel - personally, I don't like the look of white gravel, so I added a couple chunks of broken concrete near the base of the plant. The lime leaches out of the concrete and into the soil.

Lavender

bunch lavender and hang in a dark, dry place
bunch lavender and hang in a dark, dry place | Source

Harvesting Lavender

Cut lavender early in the day in order to retain utmost color and fragrance

Cut stems above the top leaves to encourage repeat blooming later in the season

Bundle lavender stems and hang upside down in a warm, dark, dry place to ensure retention of color and scent. Hanging the lavender in a clothes closet will add a delicate fragrance to your clothing.

And remember that lavender is an insect repellent!

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    • Dolores Monet profile image
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      Dolores Monet 5 weeks ago from East Coast, United States

      Hi Amanda - lavender will not thrive in wet soil. Before you decide what to do, think about why the area is wet. Maybe you should just plant the lavender in another, drier area. You could build a raised bed. You could dig a small channel around the garden for drainage.

      If the problem is heavy clay soil, you can amend the soil by mixing in organic materials such as compost, or a garden conditioner that you can find at a garden supply store.

      I used to like the idea of mixing in some sand, but that is not the best idea.

    • profile image

      amanda 7 weeks ago

      Hi there! thanks for this info. would wood chips be a good alternative to rocks for drainage in wet areas? maybe mix in some sand?

    • Dolores Monet profile image
      Author

      Dolores Monet 21 months ago from East Coast, United States

      Jenna - lavender itself? I am writing here about the soil conditions needed to grow lavender. It needs some alkalinity so if you have acid soil, you need to augment the soil.

    • profile image

      Jenna 21 months ago

      Hello, I was wondering and I think .. correct m if wrong.. I think lavender is acidic is it not? possibly around 7 or so?

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