Many herbs are believed to have medicinal properties. Medicinal herbs have been in use for thousands of years and are well known for their effectiveness in treating many diseases. For any given ailment, there is probably a reliable treatment using one or many herbs. Some are effective in boosting the immune system, increasing the bodies defence mechanisms against infections, soothing allergies and generally renewing or re-invigorating your bodies vitality. Many gardeners grow medicinal herbs simply because they are attractive and durable plants!