Herb Height and Spacing

Shorter Herbs

• Marjoram will grow 10 to 12 inches tall, while chervil may be 10 to 28 inches tall. Winter savory and woodruff grow to 6 to 12 inches. Chamomile is usually about 9 inches tall but spreads quickly. Thyme can be as short as 2 inches or as tall as 12 inches. Summer savory grows 12 to 18 inches tall, while oregano and spearmint may grow up to 24 inches. Naturally, these herbs should be planted in front of or surrounding taller plants.

Medium and Taller Herbs

• Sage can grow from 12 to 30 inches. Catnip and coriander are usually 12 to 36 inches in height. Chives are normally around 18 inches tall. Anise, burnet and parsley will grow from 18 to 24 inches. Hyssop, lavender and peppermint may grow from 18 to 36 inches. Borage, caraway, horehound, lemon balm and tarragon usually grow from 24 to 36 inches. Dill is usually 36 inches tall. Lovage can grow as high as 72 inches, while fennel may be 48 to 80 inches tall. Rosemary will also grow to 72 inches tall.

Plant Spacing

• Herbs such as caraway need only 8 inches between plants. Parsley and coriander can be planted as little as 6 inches apart. Chamomile spreads quickly on its own. Chervil only needs 3 to 4 inches of space between plants. Taller herbs such as anise, chives, marjoram and thyme should be 10 to 12 inches apart. Borage and oregano need 10 to 12 inches of space. Fennel, hyssop, lemon balm and woodruff can be planted 12 to 14 inches apart. Horehound, lavender, peppermint and spearmint can take up as much as 24 inches of space. Lovage, sage and tarragon need up to 39 inches between plantings for good growth.

Row Spacing

• Rows of anise, chervil, coriander and parsley should be 8 to 12 inches apart. Burnet, catnip and chamomile spread on their own. Chives, marjoram, oregano, thyme and woodruff can be planted in rows that are 10 inches apart. Borage and hyssop rows should be separated by 20 to 24 inches. Dill, lavender, peppermint and spearmint also need 24 inches of space between rows. Caraway, fennel and rosemary rows need at least 36 inches of growing space each.