Lavandula angustifolia Seeds | English Lavender
LATIN NAME: Lavandula angustifolia
COMMON NAME: English Lavender, Common Lavender, True Lavender
Plant Profile
English lavender is the hardiest of the lavenders and the one most often planted in northern gardens, which is slightly odd when you consider where it comes from. Lavandula angustifolia grows wild on dry limestone slopes from the Pyrenees across to Italy, on thin, stony ground that bakes in summer and drains within minutes of rain. Everything about the plant follows from that: the narrow grey leaves with their felt of trichomes, the woody base that resents sitting wet, and the flower spikes that open in June and July.
A well-grown bush reaches 60-90 cm across and slightly less in height, with the spikes adding another 15 cm. It is short-lived by shrub standards, perhaps eight to ten years before it goes leggy and hollow in the middle, and it is worth planning for that from the start rather than pretending otherwise.
Science & Biotechnology
Lavender has moved further into clinical research than most garden herbs, and the reason is a single standardized product. Silexan is an oral capsule of lavender essential oil, and it has been tested against placebo, against lorazepam and against paroxetine in randomized trials for subthreshold anxiety and mixed anxiety-depression. The effect sizes were modest but consistent, which is unusual for a plant extract, and the German regulatory framework lists lavender oil for restlessness and anxiety-related complaints.
The chemistry behind those trials is unusually well mapped. Linalool and linalyl acetate make up the bulk of the oil, and both have been shown to modulate voltage-gated calcium channels in vitro, which is a plausible route to the calming effect. What breeders watch instead is the ratio between those two compounds: it shifts with altitude and harvest date, and a late cut in cool weather can leave a spike that smells faintly of camphor rather than the clean, sweet note the oil trade pays for.
Uses & Benefits
Lavender earns its place in three separate ways, and most gardens use it for all three at once. As a structural plant it holds the front of a border through winter as a low grey mound and then flowers for six weeks; clipped after flowering, it keeps a tidy cushion instead of splaying open. As a cut and dried flower it is close to unbeatable, since the spikes hold colour for a year in a dry room.
As a bee plant it is one of the few that works in midsummer when the clover has finished, and a hedge of it will be audible from several metres away on a warm afternoon. The culinary use is real but narrower than the aromatherapy trade suggests: the flowers go into shortbread, sugar and herbes de Provence, while the leaves turn bitter and soapy when cooked, and lavender honey is a genuine regional product in Provence rather than a marketing invention.
Growing from Seed
Lavender seed germinates best with a cold spell first. Mix the seed with damp vermiculite, seal it in a bag and leave it in the refrigerator for three to four weeks, then surface-sow onto a gritty mix of two parts compost to one part horticultural grit. The seed needs light, so press it down and leave it uncovered, and hold the tray at 15-20°C. Germination is uneven, anything from ten days to a month, and the seedlings are tiny and slow for their first six weeks.
Prick them out once they have two true leaf pairs, using a gritty mix and a small pot, and grow them on cool and bright rather than warm, which keeps them stocky. Plant out in late spring once the risk of hard frost has passed, on a raised bed or a slope if your soil holds water. The first summer’s priority is root growth, not flowers: pinch out the first spikes and the bush will be twice as dense the following year.
Our Take
If you have free-draining ground and full sun, lavender is close to effortless; if you have clay, grow it in a raised bed or not at all. The plants that die over winter almost always die of wet feet in February, not of cold, and a gravel mulch around the crown prevents more losses than any feed or fleece.
Related Reading
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