Prepare the ground well in advance, fork in compost. You don’t need to add large amounts of manure or fertiliser. Level the area
Before transplanting herbs out of their "nursery" pots into the ground, water the pots well because a dry rootball is difficult to wet thoroughly once it is in the ground. Gently loosen the root ball before planting in the ground.
Pinch out the tips of shrubby herbs, like thyme, to encourage bushy growth. Add some bone meal or fishmeal at the bottom of each planting hole.
Some herbs, like the spearmint, can be invasive. Restrict their spread by planting them in sunken containers. Remove any spreading material immediately. Re-pot them yearly with fresh soil.