Lavender

Lavender (Lavandula angustifolia, English lavender) has an unusual financial profile for a garden plant: your ongoing input cost after year one is essentially zero, while the crop has three distinct markets - culinary, dried craft bundles, and fresh-cut flowers. The price ranges across those uses vary widely. Culinary lavender runs $12-20/lb dried (USDA AMS Specialty Crop Market News, 2023). Fresh-cut stems at farmers markets move at $4-8 per bunch (roughly 25 stems). Dried bundles retail $6-15 each. If you grow it well and have any local market access, the math is hard to argue with.

What it actually is

English lavender (L. angustifolia) is the cold-hardiest species, rated for zones 5-8. It is a woody subshrub reaching 1-3 feet tall and wide, with narrow gray-green leaves and flower spikes appearing in June-July (in most temperate regions). It is not the same plant as French lavender (L. dentata, zones 8-11), Spanish lavender (L. stoechas, zones 7-9), or lavandin hybrids (L. x intermedia, zones 5-8). Lavandin hybrids - ‘Grosso’, ‘Provence’, ‘Super’ - produce more oil and more stem volume than true English lavender, and are what most commercial farms grow, but their flavor is sharper and less suitable for culinary use.

For culinary applications, use English lavender varieties: ‘Hidcote’, ‘Munstead’, and ‘Vera’ are the standard kitchen choices. For maximum dried bundle yield, lavandin ‘Grosso’ outproduces English types significantly.

Germination from seed is possible but slow (21-90 days) and variable. Start with transplants or cuttings. Most lavender sold in nurseries is English or lavandin - check the label.

The ROI case

A transplant or rooted cutting costs $3-8 at retail. Year one, expect modest growth and possibly one light harvest. Year two onward, a mature English lavender plant yields 0.25-0.75 lb of dried flower and foliage (your input at that point is a haircut after bloom and occasional watering during drought). At $12-20/lb for dried culinary lavender (USDA AMS, 2023), a single mature plant returns $3-15 per season in grocery-equivalent value. Multiply that across a row of five to ten plants and the value adds up.

The hidden multiplier is propagation. Lavender roots readily from cuttings. By year three, you can take 10-20 cuttings per plant to expand your planting at zero cost, or sell them at $2-4 each at plant swaps or markets.

Growing requirements

Lavender is a Mediterranean plant. Its requirements align with that origin: full sun, sharp drainage, low soil fertility, and relatively low humidity. Planting it in the wrong conditions accounts for almost every lavender failure.

Soil pH of 6.5-7.5. Slightly alkaline is better than acidic - lime a planting bed if your soil pH is below 6.5. Heavy clay soils need significant amendment or lavender will die in its first winter. Work in 3-4 inches of coarse gravel or perlite to the top 12 inches of a clay bed, or plant in a raised bed.

Full sun is non-negotiable. Lavender in partial shade produces thin stems, reduced oil content, and is far more susceptible to disease. Plant on the south or southwest side of your garden where it won’t be shaded by taller crops.

Spacing of 18-24 inches between plants allows airflow. Poor airflow in humid summers is a direct predictor of botrytis problems. In the mid-Atlantic and Southeast, lavender struggles in wet summers regardless of soil drainage because the humidity itself promotes foliar disease.

Water new transplants regularly until established (6-8 weeks). After that, water only during extended drought - 0.25 to 0.5 inch per week maximum. Overwatering established lavender kills it more reliably than drought does.

What goes wrong

Phytophthora root rot and other water molds are the most common killers. Symptoms include browning and dieback from the center of the plant, with gray-brown root tissue at soil level. Prevention through drainage is the only effective control. There is no fungicide recovery once root rot is established.

Botrytis blight (Botrytis cinerea) thrives in humid conditions, showing as gray fuzzy mold on flower stems and foliage. Remove infected material immediately. Improve airflow by pruning the interior of the plant after harvest. In high-humidity climates (Southeast, Pacific Northwest), space plants wider than recommended and avoid any overhead irrigation.

Sharpshooter leafhoppers (Xyphon fruticulosum and related species) vector Xylella fastidiosa, a bacterial pathogen that causes lavender decline in some regions (confirmed in European lavender plantings; sporadic in the US Southeast). Symptoms are wilting and dieback despite adequate water. No treatment exists; infected plants must be removed.

Lavender shab (Phoma lavandulae) produces dieback of individual stems with dark brown lesions. Prune out affected wood to healthy tissue and disinfect pruners between cuts.

Harvest and storage

Harvest when one-third to one-half of the flower buds on a spike have opened - this is the peak aromatic stage for both culinary use and dried flower quality. If you wait until fully open, the flowers shatter and drop during drying.

Cut stems as long as possible (down to the first set of leaves on the stem). Bundle 25-50 stems with a rubber band and hang upside down in a dry, ventilated space out of direct sun. Full drying takes 2-4 weeks. The rubber band compensates for stem shrinkage during drying.

For culinary use, strip flowers from dried stems and store in an airtight jar. Dried lavender holds good flavor and aroma for 12-18 months. After harvest, cut the plant back by one-third - not into old wood. Never cut into leafless woody stems; lavender does not regenerate from bare wood the way rosemary can.

---

Related crops: Thyme, Sage

Related reading: Beginner Homestead Crops - which perennial herbs earn the most over a five-year horizon