True lavender, not being fully hardy, is little grown in northern gardens, where it must be protected over winter by mulching. It is more popular, therefore, in the milder Pacific Coast and in the South. As seed produces variable plants, propagation is commonly by cuttings of selected plants. Taken of one-year-old "wood" in spring, these are set in a shady place, 4 inches apart, and kept cultivated for a year.
Then they are transplanted not less than 2 feet asunder in permanent quarters in dry, light, limy, friable soil and full sunlight. In such a location they thrive best, develop the maximum fragrance and are least likely to be injured in winter. In wet soils, they grow but poorly; in rich soils, they become lush and sappy, and in both types they lack fragrance and easily succumb to frost.
Outdoors, containers, hydroponics.
Lavender grows to a height of 12 to 18 inches (30 - 45cm).
Lavender plants should be spaced 18 to 24 inches (45 - 60cm) apart.
Preferred pH Range
Lavender will grow in a relatively wide pH range between 6.1 (mildly acidic) and 8.5 (alkaline) with a preferred range between 6.5 and 7.5.
From seed, sow indoors six weeks before last frost. Propagates well through softwood and semi-hardwood cuttings.
Seed Germination Period
10 to 28 days. Germination of english types (L. angustifolia) is frequently below 50 percent; scarification or freezing of seedflat can sometimes improve germination.
Seeds Per Gram (Approximate)
Between 850 and 1300.
Light, well-drained, deep, not overly rich soil.
Alternative Growing Media
Soilless potting mixes, perlite, vermiculite, rockwool, coco peat, Oasis foam.
Time From Seed to Plant
Sow seeds 20 to 26 weeks before sale. Seeds to finished plugs, 12 to 16 weeks. Plugs to saleable plant, 8 to 10 weeks.
Sun & Lighting Requirements
Lavender grown outdoors prefers full sun but can tolerate some shade.
5a to 9b.
Water on a regular schedule, do not overwater.
Potential Pests & Diseases
Mealybug, whitefly, spider mites, scale. Minimal disease issues.
Lavender is known to attract bees, butterflies or birds. Fragrant flowers. Suitable for containers.
PROPAGATION FROM CUTTINGS
HOW TO MAKE A LAVENDER WAND
HOW TO MAKE LAVENDER PILLOWS