Medicinal herbalist and grower Lucy Jones believes in the powers of antiviral herbs and how they can play a positive role in helping to maintain our wellbeing in lockdown and beyond.
“Herbal medicine has a very long track record in supporting the immune system and helping patients to recover from respiratory infections,” she says.
Here, Jones recommends four top antiviral herbs to consider.
Thyme (Thymus vulgaris)
“I find it very helpful for patients with various different respiratory weaknesses as well as being wonderful for acute coughs and colds.
“Drinking a cup of thyme infusion daily is a great way to strengthen the lungs and support the immune system. Simply use a couple of sprigs of fresh herb per cup and pour on boiling water, cover the cup and leave it to steep for at least 10 minutes until it’s quite strong.”
Growing tips: Thyme, pictured above, is a hardy perennial which thrives in full sun and well drained poor to moderately fertile soil. Plants should be spaced 25cm (10in) apart. Plant in a sheltered place and cut back after flowering to prevent plants from becoming leggy.
Harvesting: “I like to take a small harvest before the plants flower, and then take a second harvest once they’re in flower. Leave the plants enough green growth so that they can recover their strength after harvesting.”
Caution: Avoid therapeutic doses if you’re pregnant.
Lemon balm (Melissa officinalis)
“Research has shown that lemon balm is good for fighting the herpes family of viruses. It’s a great home remedy to relieve cold sores, chickenpox, shingles and mononucleosis. It has a track record of reducing the unpleasant symptoms associated with the early onset of influenza.”
Growing tips: This hardy perennial likes a moist, rich soil in full sun to partial shade. After flowering, cut the dead stalks down and remove them.
Harvesting: For tea, harvest early on in the season while the stems are still soft and there’s a mass of foliage. Cut stems about 15cm (6in) from the base, or above the lower faded leaves.
Caution: Avoid therapeutic doses if you have an underactive thyroid.
Rosemary (Salvia rosmarinus, formerly Rosmarinus officinalis)
“As well as being associated with youthfulness and improved memory, rosemary has significant antiviral properties. Among its many constituents, it contains oleanolic acid which has displayed antiviral activity against influenza viruses, along with herpes viruses and HIV in studies.
“Rosemary is also considered to be an excellent herb for recovery after a debilitating viral infection.
“It’s one of the herbs that I always include in my daily pot of ‘garden tea’, not just because it tastes so good but because it has so many health benefits.”
Growing tips: Rosemary is an evergreen shrub which prefers full sun and a sandy, dry soil. Plants should be spaced 60-90cm (24-36in) apart.
Harvesting: Combine harvesting with necessary pruning of established plants. Cut stems with secateurs and be conscious of maintaining a good shape to the shrub.
Caution: Avoid if you have epilepsy.
Nasturtium (Tropaeolum majus)
“I grow nasturtiums and dry the leaves to use in herbal tinctures and infusions during the winter. When the plant is crushed or chewed, peppery, mustard-like compounds clear the sinuses as well as fighting respiratory infections.
“You can make nasturtium vinegar by picking one cup of flowers and putting them in a bottle with a peeled garlic clove and a few black peppercorns. Pour over 500ml cider vinegar and ensure that all the herb material is covered by the liquid. Leave for four weeks in a cool dark place and then strain and bottle. A teaspoon of this vinegar twice a day will give you a daily dose of antiviral goodness and help ease catarrh.”
Growing tips: Nasturtium is a half hardy annual which enjoys full sun to partial shade and a rich moist soil. Grow from seed in situ once the danger of frost has passed or start seedlings off indoors. They will self-seed exuberantly.
Harvesting: Harvest when there’s a high proportion of flowers on the plants. As I intend to dry my nasturtium crop, I cut individual leaves and flowers without the fleshy stalks attached.
Self-Sufficient Herbalism by Lucy Jones is published by Aeon Books on April 28, priced £19.99.
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