Herbs require very little care compared to many plants. How many times have you had to spray your roses or trim your orchids? Herbs, by comparison, do well in poor soil, require little fertilizer and only modest watering. If they get lots of sun and a bit of water, they usually do well all on their own.

But you’ll still want to do some planning before just throwing down seeds and walking away.

For one thing, since herbs thrive well in relatively poor conditions, they can become overgrown. Lavender will spread, Yarrow can take over large areas. Even Chives can get bushy and packed. Make sure you start with adequate space in your pot or garden for the number of plants you have in mind.

What good is an herb you can’t eat or use as medicine? Well, it’s certainly true that the majority are useful, in the sense that they make a fine seasoning or provide a cure. But some things are valuable that have no ‘use’ at all, other than to simply look beautiful.

Many herbs are better grown for their use in potpourri or as tools for the chef. They’re beneficial, but visually dull. In the world of herbs there are dozens of such plants, and many that are tasty or healthful. But there are also many that provide a pleasant view.

Few places house more junk science than in the advertisements of herbal medicines. Near miraculous claims are made that haven’t been tested or substantiated. Nevertheless, some herbs have, in fact, been used for thousands of years to help treat a number of conditions. Here are a few herbs that have been examined by leading research firms, along with possible benefits and side effects.