Buy started plants at the nursery for best results; seeds germinate slowly and erratically - and then only when they're very fresh.
Choose a site that gets full sun or very light afternoon shade and has excellent drainage (raised beds are ideal). Rosemary prefers poor to average soil with a pH of 6.5 to 7.0.
Plant at any time, setting transplants into the ground at the same depth they were growing in their nursery pots. Leave at least 2 feet all around to ensure good air circulation.
Clip leaves or sprigs anytime you need them.
Buy started plants at the nursery for planting in early spring.
Use a clay pot that measures at least 12 inches deep and 12 inches across and has plenty of drainage holes.
Fill it with a light, coarse potting mix, such as cactus soil with a handful of perlite added. Set the plants into their new quarters at the same depth they were growing in their nursery pots.
Harden off plants when all danger of frost has passed, then move them outdoors (see "How to Harden Off Seedlings").
Water regularly, keeping the soil slightly moist but never wet. During spring and early summer, feed plants monthly with compost tea.
Bring the plants back inside well before the first frost and put them in a sunny south- or west-facing window. If winter sunlight is scarce in your house, augment the supply with fluorescent lights.
Keep the soil moist and mist the plants at least twice a week with tepid water.
Clip leaves or sprigs anytime you need them.