Lavender types do not all grow with equal ease from seed and resulting plants can be variable in habit.The Mediterranean Lavendula stoechas (French lavender) germinates pretty easily under glass and light in early spring or autumn, at a temperature of 60 to 70 degrees. Use seedling trays with good drainage, moistened compost and cover seeds with only a light layer of compost or vermiculite, before keeping under glass. You should see germination in one to three months.

Courtesy of NYBG Plant Information Service