Lavender is an aromatic flowering plant, beloved for its characteristic fragrance and stunning blooms. It is part of the mint family, Lamiaceae, and originates predominantly from the Mediterranean region. Its flowers are typically purple, though certain varieties yield pink, white or even bluish blossoms.
In Britain, lavender generally flowers throughout the summer months, ordinarily from June to August, and can survive for numerous years when cultivated in suitable conditions. The plant is also extremely appealing to pollinators, especially bees and butterflies.
Optimal growing conditions
For those who cultivate the plant in Britain, lavender flourishes in sunny, dry and well-drained environments. One of the most frequent errors when growing it is excessive watering or planting it in dense soil that fails to drain properly.
Lavender also typically does not require fertilising, as a gentler approach works most effectively with this herb. Over-feeding can in fact promote leafy growth at the cost of blooms. When lavender soil receives excessive nitrogen, it hinders flowering and instead channels energy into generating plentiful soft green stems that lack aesthetic appeal, as previously reported by the Express.
Expert recommendation for more blooms
Annette Thurmon, a homesteader and founder of Azure Farm Life, has disclosed that the optimal technique for gardeners seeking to stimulate lavender blooms is to apply sand or gravel mulch.
She explained: "If your soil is too fertile, you may have fewer blooms. You can either move your plants or add sand or gravel to aerate and reduce nutrient density."
In its natural habitat, lavender thrives in rocky, arid conditions, so applying gravel or sand mulch replicates these surroundings and can help the plant flourish.
What is mulching?
Mulching involves placing a protective layer of material over the soil surrounding plants. This mulch can be composed of various materials, including wood chips, bark, compost, straw, grass clippings and gravel, and is generally spread across the soil's surface rather than incorporated into it.
Mulching can help keep moisture in the soil by reducing evaporation, suppress weeds by blocking light from reaching them, protect plant roots from temperature changes, improve soil quality when organic mulch breaks down, and reduce soil erosion and prevent soil from drying out too quickly.
However, sand or gravel mulch proves most effective, reflecting sunlight back onto the plant, keeping the soil warm and encouraging it to direct more energy towards producing flowers rather than growing leafy stems. It is surprisingly easy to inadvertently overwater lavender – one of the most frequent mistakes when growing this plant – but gravel or sand mulch enhances drainage in the soil. Lavender plants left in waterlogged conditions for prolonged periods risk their root systems becoming saturated, weakened, or even diseased.
How to buy and apply sand or gravel mulch
When sourcing this type of mulch, look out for builder's sand or pea gravel, as both provide excellent drainage and airflow. Try to steer clear of finer varieties of sand, as these tend to clump together, hindering water from reaching the roots efficiently.
When applying, spread the gravel or sand mulch around the base of the lavender, leaving a small gap around the stem to avoid moisture accumulating in that area. Annette said: "Apply a thin layer of mulch around the base of the lavender plants to help retain moisture, suppress weeds, and regulate soil temperature."
Ensure water can drain freely through the soil without collecting, and the ground surrounding your lavender should remain in excellent condition for the rest of the flowering season.
