Nasturtium Medicinal Uses for Natural Remedies: 8 Ways to Use Nasturtium Edible & Medicinal Flowers

Introduction to Nasturtium: A Powerhouse Healing Plant

Nasturtium (Tropaeolum majus) is one of the most underrated plants in the world of natural medicine and culinary arts. With its vivid orange, red, and yellow blossoms and distinctively peppery-flavored leaves, nasturtium has been cultivated in gardens for centuries — not merely for its ornamental beauty, but for its remarkable healing properties. This vigorous, easy-to-grow plant originated in South America and was brought to Europe in the 16th century, where it quickly earned a reputation as both a food source and a therapeutic herb. Today, herbalists, naturopaths, and home gardeners alike are rediscovering what indigenous Andean cultures knew long ago: nasturtium is a genuinely powerful plant ally.

What makes nasturtium particularly compelling from a medicinal standpoint is the breadth of its bioactive compounds. The plant is rich in glucosinolates — sulfur-containing compounds that break down into isothiocyanates, which have demonstrated antimicrobial, antifungal, and even anti-cancer properties in research settings. Nasturtium is also packed with vitamin C, making it one of the most potent natural immune-supportive herbs you can grow at home. Every part of the plant — flowers, leaves, stems, and seeds — contains these beneficial compounds, making it a remarkably versatile addition to any natural wellness routine.

Beyond its chemical constituents, nasturtium is beloved by herbalists because it is genuinely accessible. Unlike many medicinal herbs that require special growing conditions, expensive supplements, or obscure sourcing, nasturtium thrives in ordinary garden soil, requires minimal care, and produces abundantly from late spring through autumn. Whether you dry it for teas, infuse it into oils, eat it fresh in salads, or prepare it as a tincture, nasturtium offers a practical, affordable, and effective entry point into plant-based medicine. This article explores eight of the most well-documented and widely practiced medicinal uses for this extraordinary edible flower.

The Nutritional and Phytochemical Profile of Nasturtium

Before diving into specific remedies, it’s worth understanding why nasturtium works as medicine. The plant’s therapeutic action is rooted in its unusually rich phytochemical makeup. Glucosinolates are perhaps the most significant of these compounds. When nasturtium tissue is chewed or crushed, an enzyme called myrosinase converts glucosinolates into isothiocyanates, most notably benzyl isothiocyanate (BITC). BITC has been the subject of numerous scientific studies examining its ability to inhibit the growth of harmful bacteria, fungi, and even certain cancer cell lines. This natural antibiotic-like compound is responsible for much of nasturtium’s sharp, peppery taste and a significant portion of its healing reputation.

In addition to glucosinolates, nasturtium is an exceptional source of vitamin C — the flowers and leaves contain concentrations comparable to or exceeding many citrus fruits. Vitamin C is essential for immune function, collagen synthesis, and antioxidant defense. The plant also provides meaningful amounts of vitamin A in the form of carotenoids (the compounds responsible for those gorgeous warm-colored petals), vitamin K, iron, and lutein. These nutrients work synergistically with the phytochemicals to support overall health, making nasturtium a genuinely functional food rather than a mere garnish. Regular consumption of fresh nasturtium contributes meaningfully to micronutrient intake, particularly during seasons when fresh vegetables are limited.

Nasturtium also contains flavonoids, including kaempferol and quercetin, which are potent anti-inflammatory and antioxidant compounds. These molecules help neutralize free radicals, reduce systemic inflammation, and may support cardiovascular health over time. The combination of these various bioactive substances — glucosinolates, vitamin C, carotenoids, and flavonoids — creates a phytochemical synergy that makes nasturtium far more effective than any single isolated compound would be. This is consistent with the herbalist’s understanding of whole-plant medicine: the complex interplay of plant constituents often produces therapeutic effects that single-molecule pharmaceutical approaches cannot fully replicate.

Use 1 and 2: Natural Antibiotic and Immune Support

One of nasturtium’s most celebrated medicinal applications is its natural antibiotic activity. The isothiocyanates released when nasturtium is consumed or applied topically have been shown in laboratory studies to inhibit the growth of a wide range of bacteria, including Staphylococcus aureus, Escherichia coli, and various strains of Pseudomonas. Unlike pharmaceutical antibiotics, which often disrupt the gut microbiome and contribute to the growing global problem of antibiotic resistance, nasturtium’s broad-spectrum antimicrobial action appears to work through multiple pathways, potentially making it harder for bacteria to develop resistance. Herbalists have long used fresh nasturtium preparations to address minor infections, urinary tract discomfort, and respiratory bacterial involvement.

For practical antibiotic use, the most effective preparations involve consuming fresh or minimally processed nasturtium. Eating a generous handful of fresh leaves and flowers daily during periods of infection or exposure to illness delivers a meaningful dose of BITC directly to the body. A simple nasturtium vinegar — made by steeping fresh nasturtium leaves and flowers in raw apple cider vinegar for two to four weeks — can be used as a daily tonic, added to dressings, or diluted in water and taken by the spoonful. For urinary tract support specifically, nasturtium tea (a cold infusion is often preferable to preserve volatile compounds) combined with adequate hydration provides a gentle but effective approach to discouraging bacterial proliferation in the urinary system.

Nasturtium’s immune-supportive properties extend well beyond its antibiotic activity. Its exceptional vitamin C content plays a foundational role in immune cell production and function, helping the body mount an effective defense against both bacterial and viral threats. The carotenoids in nasturtium petals support the integrity of mucosal membranes — the first line of physical defense against pathogens in the respiratory and digestive tracts. Regular consumption of nasturtium throughout the growing season serves as a gentle, food-based way to maintain robust immune function. Many herbalists recommend beginning to incorporate fresh nasturtium into the diet in late summer, precisely when autumn colds and respiratory infections typically begin to circulate, providing a natural seasonal immunological buffer.

Use 3 and 4: Respiratory Health and Wound Healing

Nasturtium has a long folk medicine tradition as a remedy for respiratory conditions, and this use is well supported by the plant’s phytochemistry. The expectorant and mucolytic properties of nasturtium — its ability to loosen and move mucus from the airways — make it particularly useful for coughs, bronchitis, and congestion. The glucosinolates in nasturtium act as natural expectorants when ingested, stimulating the secretion of thinner mucus that is easier to clear from the respiratory tract. This is similar in action, though gentler in effect, to pharmaceutical expectorants. A warm nasturtium tea taken several times daily during respiratory illness can significantly ease the discomfort of productive coughs and help speed recovery by keeping the airways clear of congested secretions.

For respiratory applications, both hot infusions and steam inhalations can be effective. A strong hot tea made from fresh nasturtium leaves and flowers — combined with complementary herbs such as thyme or ginger for enhanced effect — works well as an internal expectorant. Alternatively, adding a strong nasturtium infusion to a bowl of hot water and inhaling the steam (with a towel draped over the head to trap the vapors) delivers the volatile antimicrobial compounds directly to the inflamed mucous membranes of the nasal passages and throat. This approach is particularly helpful for sinus congestion and early-stage upper respiratory infections, when direct topical application to the respiratory mucosa can have an immediate and noticeable effect.

Nasturtium’s wound-healing applications are equally impressive and well-documented in herbal tradition. Applied topically as a poultice of fresh crushed leaves, or as a salve made from nasturtium-infused oil, the plant’s antimicrobial and anti-inflammatory compounds create an environment hostile to pathogenic bacteria while simultaneously reducing the inflammatory response that can delay healing. The vitamin C in nasturtium plays a direct role in wound repair by supporting collagen synthesis — the structural protein that holds healed tissue together. Minor cuts, abrasions, insect bites, and skin infections have all been treated effectively with topical nasturtium preparations in folk medicine traditions spanning continents and centuries, from the Andes to European cottage gardens.

• Nasturtium Poultice: Crush a generous handful of fresh nasturtium leaves into a paste using a mortar and pestle. Apply directly to minor wounds, insect bites, or inflamed skin. Cover with a clean cloth and leave in place for 20 to 30 minutes. Repeat two to three times daily as needed.
• Nasturtium Infused Oil: Fill a clean glass jar with freshly wilted nasturtium leaves and flowers. Cover completely with a carrier oil such as olive or jojoba oil. Allow to infuse for four to six weeks in a cool, dark location, shaking daily. Strain and use as a topical wound-care oil or as the base for a healing salve.
• Nasturtium Steam Inhalation: Prepare a strong infusion using 2 to 3 tablespoons of fresh nasturtium in 2 cups of just-boiled water. Steep for 10 minutes, then use for steam inhalation or drink as a tea to support respiratory clearing.

Use 5 and 6: Digestive Support and Hair and Scalp Health

Nasturtium has been used across multiple herbal traditions to support healthy digestion, and its mechanisms for doing so are multifaceted. The bitter compounds in nasturtium leaves stimulate the production of digestive secretions — bile, stomach acid, and pancreatic enzymes — that are essential for the efficient breakdown and absorption of food. This bitter tonic action makes nasturtium particularly useful for people who experience sluggish digestion, bloating, or a sense of heaviness after meals. Incorporating fresh nasturtium leaves into salads and meals as a bitter green is one of the simplest and most pleasant ways to support this digestive stimulation, essentially using food as medicine in its most direct form.

The antimicrobial properties of nasturtium also benefit the digestive system directly. Dysbiosis — an imbalance of gut microbiota, often involving an overgrowth of harmful bacteria or yeast — is implicated in a wide range of digestive and systemic health problems. The glucosinolates in nasturtium selectively inhibit pathogenic organisms while appearing to leave beneficial gut bacteria relatively undisturbed, according to some research. This makes nasturtium a potentially valuable addition to protocols addressing mild digestive infections, candida overgrowth, or general gut microbiome imbalance. A simple approach involves eating fresh nasturtium with meals regularly, or taking nasturtium vinegar as a pre-meal digestive tonic to stimulate healthy digestive function while simultaneously providing antimicrobial support to the gut environment.

Perhaps one of the most surprising and less commonly known medicinal uses for nasturtium is its application to hair and scalp health. Nasturtium is rich in sulfur — an essential mineral for the health of hair follicles — and its stimulating circulation-enhancing properties make it a valued ingredient in natural hair care. Topical application of nasturtium preparations to the scalp has traditionally been used to address hair thinning, scalp infections (including dandruff caused by fungal overgrowth), and to stimulate hair growth by improving circulation to the hair follicles. The isothiocyanates in nasturtium inhibit the fungi commonly associated with dandruff, making a nasturtium rinse or scalp treatment a practical, chemical-free alternative to medicated dandruff shampoos for mild to moderate cases.

Use 7 and 8: Anti-Inflammatory Benefits and Culinary Medicine

Chronic low-grade inflammation underlies a wide spectrum of modern health conditions, from cardiovascular disease and type 2 diabetes to arthritis and depression. Nasturtium’s rich array of anti-inflammatory phytochemicals — particularly its flavonoids quercetin and kaempferol, along with its carotenoids and vitamin C — position it as a genuinely useful dietary tool for addressing systemic inflammation. Quercetin in particular has been extensively studied for its ability to inhibit the production of pro-inflammatory cytokines and modulate immune responses that contribute to chronic inflammatory conditions. While nasturtium alone is not a treatment for serious inflammatory disease, its regular inclusion in the diet as a functional food can meaningfully support an overall anti-inflammatory dietary pattern.

For joint pain and inflammatory conditions such as mild arthritis, nasturtium can be used both internally and externally. Internal use focuses on consuming fresh or lightly prepared nasturtium regularly — in salads, as a tea, or as a daily dose of nasturtium tincture — to deliver a consistent supply of anti-inflammatory compounds to the systemic circulation. External use involves applying nasturtium-infused preparations directly to affected joints or inflamed areas. A nasturtium-infused oil or strong nasturtium tea used as a warm compress over arthritic joints provides localized delivery of anti-inflammatory compounds while the warmth of the compress itself helps reduce pain and stiffness. This dual approach, addressing inflammation both systemically through diet and locally through topical application, is characteristic of holistic herbal medicine and tends to produce more sustained results than either approach alone.

The concept of culinary medicine — using food deliberately to achieve specific health outcomes — finds one of its best examples in nasturtium. Every part of the plant is edible and medicinally active, making it uniquely suited to being a dietary staple rather than merely a supplement. Fresh nasturtium flowers brighten salads and deliver carotenoids and vitamin C in their most bioavailable form. The leaves, with their peppery bite, work beautifully in pestos, compound butters, wraps, and stir-fries, while delivering glucosinolates that support antimicrobial and potentially anti-cancer pathways. Even nasturtium seeds, when pickled in vinegar and used as a caper substitute, retain significant medicinal value. The combination of exceptional flavor, remarkable versatility, and genuine therapeutic potency makes nasturtium an indispensable plant for anyone interested in using food as a foundation of health and healing.

Quick Reference: 8 Nasturtium Medicinal Uses

1. Natural Antibiotic: Use fresh nasturtium or nasturtium vinegar to support the body in fighting bacterial infections, including urinary tract infections and minor skin infections.
2. Immune Support: Regular consumption of fresh nasturtium delivers high doses of vitamin C, carotenoids, and flavonoids to strengthen immune defenses throughout the year.
3. Respiratory Health: Nasturtium tea and steam inhalations act as natural expectorants and antimicrobials to relieve congestion and support recovery from respiratory illness.
4. Wound Healing: Fresh poultices and infused oils provide antimicrobial, anti-inflammatory, and collagen-supporting benefits to help heal minor cuts, abrasions, and skin infections.
5. Digestive Support: Bitter compounds in nasturtium stimulate digestive secretions, while antimicrobial glucosinolates support a healthy gut microbiome and discourage pathogenic overgrowth.
6. Hair and Scalp Health: Nasturtium rinses and topical preparations address fungal dandruff, stimulate scalp circulation, and support hair follicle health through their sulfur and phytochemical content.
7. Anti-Inflammatory Support: The flavonoids, carotenoids, and vitamin C in nasturtium work together to reduce systemic and localized inflammation, supporting joint health and overall wellness.
8. Culinary Medicine: Using nasturtium flowers, leaves, and seeds in everyday cooking is the most accessible and enjoyable form of nasturtium medicine, delivering therapeutic benefits through delicious, nutritious meals.

How to Grow, Harvest, and Prepare Nasturtium at Home

One of the greatest advantages of using nasturtium as a medicinal herb is how remarkably easy it is to grow. Nasturtium thrives in poor to average soil — in fact, overly rich, fertilized soil tends to produce plants that are heavy on leaves and light on flowers. Direct sow seeds in a sunny to partially shaded location after the last frost date for your region, pressing them about an inch into the soil and spacing them 8 to 12 inches apart. Nasturtium is drought-tolerant once established, requires little or no fertilizing, and self-seeds freely in many climates. Both the bush variety and the trailing or climbing variety are equally medicinal; choose based on your available space and aesthetic preferences. Within 6 to 8 weeks of planting, you will have a continuous harvest of flowers, leaves, and eventually seeds throughout the growing season.

Harvesting nasturtium for medicinal use is best done in the morning after the dew has dried, when the plant’s phytochemical content tends to be at its peak. Harvest flowers as they open fully, choosing blooms that are vibrant and free from blemish. Leaves are most potent when young and tender, though mature leaves are also valuable. For fresh culinary and medicinal use, harvest as needed and use immediately to preserve volatile compounds. For preservation, nasturtium can be dried (though some volatile compounds are lost in the drying process), infused into vinegar or oil, tinctured in alcohol, or frozen — with frozen preparations retaining significantly more of the plant’s medicinal potency than dried preparations. Seeds can be harvested when they are plump and green, before they fully dry on the plant, for use as fresh capers or for further medicinal preparations.

Preparing nasturtium for medicinal use at home requires little in the way of equipment or expertise. A basic set of preparations — fresh vinegar tincture, infused oil, and regular inclusion in meals — covers the majority of nasturtium’s therapeutic applications and can be accomplished by anyone with access to a garden or even a few pots on a sunny balcony. As with any herbal medicine, it is important to begin with small amounts if you are new to nasturtium, to ensure you don’t have an unexpected sensitivity, and to consult a qualified healthcare provider if you are pregnant, nursing, taking prescription medications, or managing a serious health condition. That said, nasturtium consumed as food is recognized as safe for most people, and its long history of use across diverse global food cultures attests to its excellent safety profile when used thoughtfully and in reasonable amounts.

Basic Nasturtium Preparations at a Glance

• Fresh Use: Add flowers and young leaves directly to salads, sandwiches, pestos, and soups for immediate nutritional and medicinal benefit with maximum potency.
• Nasturtium Vinegar: Steep fresh nasturtium in raw apple cider vinegar for 2 to 4 weeks. Strain and use as a daily tonic, salad dressing base, or diluted digestive support preparation.
• Nasturtium Tea: Steep 2 tablespoons of fresh nasturtium leaves and flowers in 1 cup of hot (not boiling) water for 10 minutes. Drink up to 3 cups daily for immune and respiratory support.
• Infused Oil: Wilt fresh nasturtium and infuse in olive or jojoba oil for 4 to 6 weeks. Use topically for wound care, scalp treatments, and anti-inflammatory compresses.
• Pickled Nasturtium Capers: Pack green nasturtium seeds into a jar with white wine vinegar, salt, and optional herbs. Use after 2 weeks as a medicinal condiment with genuine antimicrobial properties.

Nasturtium is a plant that rewards curiosity and experimentation. The more you work with it — growing it, cooking with it, preparing simple remedies from it — the deeper your appreciation will grow for its remarkable range of gifts. In an era when many people are searching for ways to take more active, informed roles in their own health care, nasturtium stands out as a genuinely accessible, evidence-supported, and abundantly beautiful ally. Whether you are a seasoned herbalist or someone simply looking to add more plant medicine into your daily life, nasturtium offers one of the most generous and reliable entry points into the world of healing plants. Grow it, eat it, share it — and let this ancient and extraordinary plant become a cornerstone of your home medicine garden.