We find Milk thistle to be a fascinating herb with a long history of traditional use, and it’s surprisingly easy to grow in the garden! While it may look intimidating with its spiky leaves, this plant has so much to offer.

What is milk thistle?
Milk thistle is a hardy, flowering herb known for its distinctive white veined leaves and vibrant purple flower heads. Although it’s prickly to the touch, this plant is prized for its medicinal properties. The active compound in milk thistle, silymarin, is believed to have powerful antioxidant, anti-inflammatory, and liver supporting benefits.
The benefits of milk thistle
Milk thistle isn’t just a pretty plant, it has been used for centuries in traditional medicine. Here are some benefits:
- Liver support: Milk thistle is renowned for its ability to support liver health. Silymarin helps protect liver cells from damage caused by toxins, free radicals, and inflammation. It’s used in traditional Chinese medicine (TCM) to cleanse the liver, reduce inflammation, and strengthen the organ.
- Improved digestion: This herb promotes bile flow to the gallbladder, which aids in the digestion of fats. If you’ve ever felt sluggish after a heavy meal, milk thistle might be a natural way to support your digestive system.
- Blood sugar management: Research suggests that milk thistle may improve insulin sensitivity, helping to regulate blood sugar levels.
- Medicinal Tea: Many people enjoy harvesting milk thistle leaves to brew a soothing tea. It’s not just tasty, it’s also packed with nutrients!

How to grow milk thistle in your garden
Growing milk thistle is a rewarding experience, but it does require a little care and caution. Here’s a step-by-step guide to get you started:
- Choose the right location: Milk thistle thrives in full sun and well drained soil. It’s a hardy plant that can tolerate poor soil conditions, making it a great addition to almost any garden.
- Planting seeds: Sow the seeds directly into the soil in early spring, after the last frost. Water them lightly to help them establish roots.
- Watch out for thorns! Milk thistle has prickly leaves that can be painful to touch. Always wear gloves when handling the plant to avoid getting pricked.
- Harvesting: Once the plant matures, you can collect its leaves, flower heads, and seeds. The seeds are especially valuable for their medicinal properties, but be cautious—milk thistle is an invasive plant. To prevent it from spreading, collect the seeds before the flower heads dry out. A great trick is to cover the flower heads with a mesh net bag to catch the seeds before they fall.
Milk thistle is not only beneficial for your health but also a stunning addition to your summer garden. Its bright purple flowers attract pollinators, and its hardy nature makes it low maintenance. If you enjoy herbal teas, you’ll love being able to harvest your own milk thistle leaves and seeds to make a fresh cup of tea!

A word of caution
While milk thistle has many benefits, it’s important to use it responsibly. Here are some safety tips:
- Consult your healthcare provider: Before consuming milk thistle, speak with your doctor, especially if you are pregnant, nursing, have a medical condition, or are taking medications.
- Control its spread: As mentioned earlier, milk thistle is an invasive plant. Be diligent about collecting its seeds to prevent it from spreading uncontrollably in your garden or neighbouring areas.
Milk thistle is a beautiful, beneficial herb that’s worth adding to your garden. While its prickly leaves may require some careful handling, the rewards are well worth the effort.
From supporting liver health to aiding digestion, this plant is a powerhouse of natural goodness. Just remember to handle it with care and enjoy the process of growing your very own medicinal herb!
So, why not give milk thistle a try next season?