Common lavender makes about 2-3 ft high, and 3 ft spread... more or less depending on the cultivar. Hidcote makes about 18", while Jean Davis, Hidcote Pink, Loddon Pink, and Rosea are more like 10-15", and Munstead dwarf is about 12". Spike lavender, Lavendula latifolia, is about 12-18", silvery-green foliage, and, like Spanish lavender, L. stoechas, is hardy to USDA zone 6. L. dentata, French lavender, makes about 3 ft, but really doesn't like much colder than USDA zone 8. If you're looking for the perfume lavender, look for L. intermedia 'Provence'. Kay Lancaster kay@fern.com just west of Portland, OR; USDA zone 8 (polarfleece)