How to Propagate Lavandula rotundifolia

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Round and Round We Grow: Propagating the Charming Lavandula rotundifolia

Lavandula rotundifolia, also known as round-leaf lavender, is a captivating plant beloved for its charming round leaves and vibrant purple blooms. Unlike its more common cousin, Lavandula angustifolia (English lavender), this species offers a unique aesthetic with its distinctive foliage. If you’re looking to add this beauty to your garden, you’re in luck! Propagating Lavandula rotundifolia is totally achievable, even for beginner gardeners.

Let’s explore the two most successful methods:

1. Taking Cuttings:

  • When to propagate: The ideal time is during the active growing season, from late spring to early summer. Look for healthy, non-flowering stems.
  • What you’ll need:
    • Sharp, clean pruning shears or a knife
    • Seed starting mix or a well-draining potting mix
    • Small pots (approximately 3 inches in diameter)
    • Rooting hormone (optional, but helpful)
  • Step-by-step guide:
    1. Select healthy stems, about 3-4 inches long, and make a clean cut just below a leaf node.
    2. Remove the lower leaves from the cutting, leaving only a few at the top.
    3. (Optional) Dip the cut end into rooting hormone to encourage root development.
    4. Fill the pots with the prepared potting mix and moisten it thoroughly.
    5. Create a small hole in the center of each pot and gently insert the cutting.
    6. Firm the soil around the cutting to provide support.
    7. Place the pots in a bright location, but out of direct sunlight.
    8. Keep the soil consistently moist, but avoid overwatering.
    9. In a few weeks, gently tug on the cuttings to check for root development. Resistance means roots are forming!
    10. Once the roots are established, you can transplant the cuttings to larger pots or directly into your garden.

2. Growing from Seed:

  • When to sow: Lavandula rotundifolia seeds benefit from a period of cold stratification, so starting them indoors 6-8 weeks before the last frost is best.
  • What you’ll need:
    • Seed starting mix
    • Seed tray or small pots
    • Water spray bottle
  • Step-by-step guide:
    1. Fill your seed tray or pots with a well-draining seed starting mix.
    2. Moisten the mix with a spray bottle.
    3. Sprinkle a few seeds on the surface of the mix and lightly cover them with a thin layer of soil (about 1/4 inch).
    4. Place the tray or pots in a cool location (around 40-45°F) for 4-6 weeks. This stratification mimics winter conditions and promotes germination.
    5. After stratification, move the tray to a warm, bright location (around 70-75°F) and ensure the soil remains moist.
    6. Germination can take 2-4 weeks. Be patient!
    7. Once the seedlings have a couple of sets of true leaves, you can thin them out, leaving the strongest seedling in each pot.
    8. When the seedlings are a few inches tall, you can harden them off (gradually acclimating them to outdoor conditions) before transplanting them into your garden.

General Tips:

  • Regardless of the propagation method, Lavandula rotundifolia flourishes in well-drained soil and full sun to partial shade.
  • Once established, this drought-tolerant plant requires minimal watering.
  • Pinch back young plants to encourage a bushier growth habit.

Propagating Lavandula rotundifolia allows you to expand your garden with this unique lavender variety while deepening your connection to the rewarding process of plant propagation. So, grab your gardening gloves, and enjoy the journey of welcoming these round-leaved beauties to your outdoor space!