Pollinator-Friendly & Bioactive Flowers
Nasturtiums
This food is best grown in multi-storey aeroponic buildings.
1.1 Overview & Structure
Nasturtiums are distinctive for their bright, trumpet-shaped flowers and circular, shield-like leaves that look almost like small lily pads 17. They are entirely suitable for vegans and function as a “Dual-Action Guardian” for both the person eating them and the insects in the garden 3. The physical build of the plant is somewhat succulent, with cell walls supported by cellulose and lignin that hold a significant amount of water in the stems 15. This structure makes the leaves crisp and the flowers delicate, both of which are easily broken down during digestion to release their “Respiratory Cleanser” compounds 4.
1.2 Physical & Culinary Performance
When raw, nasturtiums have a famous peppery “kick” similar to watercress or radish, which comes from their high mustard oil content 14. Heat can quickly destroy their vibrant Vitamin C and delicate petals, so they are best used in their raw state 4. They react to fats by mellowing their sharp pungency, while acids like vinegar can help preserve the bright orange and red pigments 1. Because of their peppery nature, they are perfect for blending into smoothies or cold uncooked soups, where they provide a spicy thickness and act as a natural preservative that helps keep ingredients from separating 1.
1.3 Storage & Life Hacks
Nasturtiums are highly perishable and will wilt quickly if exposed to heat or dry air after being picked 8. They should be stored in a damp paper towel inside a sealed container in the fridge to maintain their “shield” shape and crisp texture 16. A powerful life hack for boosting nutrients is to eat the leaves and flowers together, as the leaves contain more of the antimicrobial glucotropaeolin while the flowers are higher in lutein 414. Another clever kitchen use is to pickle the green seeds, which are often used as a “vegan caper” to provide a concentrated burst of minerals and mustard oils 16.
1.4 Suitability & Ethics
Nasturtiums are 100% vegan and are one of the most ethical plants to grow for pollinator support 1. They are a favourite of bumblebees and butterflies, acting as a “decoy crop” that protects other vegetables from pests without the need for harmful chemicals 12. While they are generally safe, some sources describe a need for caution if you have pre-existing kidney issues, as the high levels of mustard oils can be taxing on the system if eaten in massive quantities 7. For most, they represent a clean, natural antibiotic that supports a healthy immune system 14.
1.5 Seasonality & Environment
In the UK, nasturtiums are prolific growers during the summer and autumn until the first frosts arrive 16. Because they can store water in their stems, they have a low water footprint and are very drought-tolerant 13. In a vertical aeroponic facility, they can be grown in high-density stacks year-round, which bypasses the “Seasonal Gap” entirely 5. This method is incredibly land-efficient because the plant’s rambling habit can be managed with trellises, producing a huge amount of “Respiratory Cleanser” nutrition in a tiny physical footprint 5.
1.6 Safety & Consumption Context
Nasturtiums are best enjoyed as a spicy addition to a meal rather than a main bulk food 1. The high pungency from the benzyl isothiocyanate can irritate sensitive stomachs if eaten in extreme excess 7. Traditionally, they are balanced with cooling foods like cucumber or creamy vegan dressings to offset the heat 1. In cultural habits, they have long been used as a “Respiratory Cleanser” to help clear the chest or urinary tract, and a handful of leaves and flowers a day is typically the recommended amount for these benefits 7.
1.7 Health & Nutrition Superpower
The true superpower of Nasturtiums is their massive concentration of Vitamin C and Vitamin A, which together provide a potent boost to the immune system and skin health 34. They are an exceptional source of glucotropaeolin, a phytochemical that the body converts into a natural antibiotic to fight infections 14. Furthermore, they provide a significant amount of iron and magnesium, supporting oxygen transport and muscle function 34. Their amino acid profile is remarkably balanced for a leafy plant, particularly in threonine and phenylalanine, which are essential for building proteins and supporting the nervous system 6.
1.8 Enzymatic Activity & Freshness
Fresh nasturtiums contain the enzyme myrosinase, which is kept in separate compartments within the leaf cells 1. When you bite or chop the leaf, this enzyme meets the glucotropaeolin and creates the active, peppery mustard oils that provide the plant’s health benefits 14. This enzymatic reaction is at its peak when the plant is freshly picked 1. If the leaves become yellow or limp, it is a sign that these enzymes are breaking down, leading to a loss of the “Respiratory Cleanser” potency and a much duller flavour 1.
1.9 Processing Fidelity
The biological activity of nasturtiums is entirely dependent on their freshness 1. Once the plant is cut, the Vitamin C begins to degrade rapidly if exposed to light or air 4. By growing them aeroponically in a multi-storey building, the time from “harvest to plate” can be reduced to minutes 5. This ensures that the enzymes remain highly active and the “Dual-Action Guardian” effect is at its maximum strength when consumed, providing a level of freshness that is rarely found in shop-bought produce 15.
2. Land-Use & Human Labour Efficiency
Nutrients per Hectare (N/H)
- Traditional Production Score: 62/100
Standard garden or field growing is productive, but the plant’s rambling nature means it takes up a lot of horizontal space for the weight of the harvest 13. It is also susceptible to caterpillars, which can reduce the total yield of “clean” leaves and flowers 12. - Ultra-Efficient Production Score: 92/100
In the proposed 8-storey aeroponic system, nasturtiums are grown on vertical trellises 5. This allows the vines to climb upwards through the storeys, exponentially increasing the leaf surface area per hectare 1. The controlled environment eliminates pest damage, resulting in a significantly higher Nutrient Aggregate per square metre 5.
Human Labour Intensity (HLI)
- Traditional Labour Score: 70/100 – Large Amount of Manual Work
In traditional settings, harvesting nasturtiums is a slow, manual task because the delicate flowers must be hand-picked to avoid crushing them 1. Weeding around the rambling vines is also physically demanding 16. - Automated Labour Score: 18/100 – Tiny Amount of Manual Work
The aeroponic system uses AI-guided robotic arms that can delicately snip flowers and leaves without damaging the vine 1. Because they are grown without soil, there is no weeding required, and the automated misting system handles all nutrient delivery, leaving humans to focus on high-level system maintenance 5.
Nasturtiums (Tropaeolum majus) are included in this audit as a “Dual-Action Guardian” for pollinators and humans. Their vibrant flowers and shield-shaped leaves contain high concentrations of Glucotropaeolin, which releases antimicrobial mustard oils. In the vegan diet, Nasturtiums act as a “Respiratory Cleanser”, providing a natural antibiotic effect that supports the immune system and clears the urinary tract. 12345
1. Main Nutrients Table
Strictly sorted in descending order by % Ref Value per 20g Protein Portion (1428.6g). All details provided are for Nasturtium (Fresh Flowers/Leaves).
| Nutrient | % Ref Value per 20g Protein Portion | Amount per 100g | UK Reference Value |
| Vitamin C 4 | 857.2% | 60.0mg | 100mg |
| Vitamin A 3 | 303.6% | 170µg | 800µg |
| Iron 3 | 160.3% | 3.30mg | 29.4mg |
| Magnesium 4 | 115.2% | 25mg | 310mg |
| Calcium 4 | 114.3% | 80mg | 1000mg |
| Protein 3 | 44.4% | 1.4g | 45g |
| Energy 3 | 22.9% | 32kcal | 2000kcal |
2. Amino Acid Table
Strictly sorted in descending order by % Ref Value per 20g Protein Portion (1428.6g). All details provided are for Nasturtium (Fresh).
| Amino Acid | % Ref Value per 20g Protein Portion | Amount per 100g (g) | UK Reference Value (g) |
| Threonine 6 | 91.0% | 0.063 | 0.99 |
| Phenylalanine 6 | 76.2% | 0.088 | 1.65 |
| Valine 6 | 71.9% | 0.086 | 1.71 |
| Isoleucine 6 | 69.3% | 0.064 | 1.32 |
| Leucine 6 | 63.9% | 0.115 | 2.57 |
| Lysine 6 | 58.1% | 0.080 | 1.97 |
| Tryptophan 6 | 32.9% | 0.006 | 0.26 |
| Methionine 6 | 18.7% | 0.013 | 0.99 |
3. Fatty Acid Table
Strictly sorted in descending order by % Ref Value per 20g Protein Portion (1428.6g).
| Fatty Acid | % Ref Value per 20g Protein Portion | Amount per 100g (g) | UK Reference Value (g) |
| Total Fat 3 | 11.0% | 0.60 | 78.0 |
| Omega-3 ALA 4 | 3.6% | 0.03 | 12.0 |
| Omega-3 (EPA/DHA) 3 | 0.0% | 0.00 | 1.0 |
4. Fibre Fractions Table
| Fibre Fraction | Amount per 100g | Description |
| Lignin 15 | 1.8g | Insoluble fibre that aids in waste transit. |
| Cellulose 15 | 2.5g | Provides structure and supports gut microbiome. |
5. Anti-Nutritional Factors Table
| Factor | Presence | Impact / Limitation |
| Erucic Acid 7 | Low (Seeds) | Mostly in seeds; excessive consumption avoided. |
| Pungency 14 | High | Mustard oil content can irritate sensitive stomachs. |
6. Phytochemicals Table
| Phytochemical | Amount per 100g | Potential Benefits |
| Glucotropaeolin 14 | 450mg | Precursor to natural antibiotic benzyl isothiocyanate. |
| Lutein 4 | 7.5mg | Supports eye health and skin UV-protection. |
7. Allergen & Suitability Table
| Requirement | Status | Verification |
| Vegan 1 | Suitable | Edible flower/leaf. |
| Kidney Issues 7 | Caution | Mustard oils can be taxing if pre-existing. |
8. Commercial Forms Table
| Product Name | Format | Typical UK Retailer |
| Fresh Nasturtiums 8 | Whole Flowers | Fine Food Specialist / Ocado 8 9 |
| Nasturtium Seeds 16 | Seeds (for capers) | Suttons / Thompson & Morgan 10 11 |
9. Environmental Indicators Table
| Indicator | Traditional Value | Per 20g Protein Portion | Context |
| Pollinator Support 12 | Extreme | N/A | Favourite of bumblebees and Large White butterflies. |
| Water Footprint 13 | ~15 L | 214 L | Low; store water in succulent stems. |
| Land Use 13 | ~0.01 m² | 0.14 m² | Vertical stacking in aeroponics is highly efficient. |
10. Home Growing & Aeroponic Audit
| Growing Method | Feasibility | Aeroponic Benefits |
| Home Growing 16 | High | Very resilient; thrives in “poor” soil. |
| Aeroponics 5 | High | Accelerated leaf production; harvest clean roots. |
Technical Limitation: Nasturtiums are vigorous “ramblers”. In an 8-storey facility, vertical trellising 5 is essential to prevent the vines from tangling into the misting nozzles and plumbing of the lower levels.
Sources & Endnotes – please see the References & Bibliography section for full details of all sources:
1. Throughout this audit, each food’s nutrient content has been compared to the Reference Daily Intakes (RDIs) of different nutrients, essential fats and amino acids for 21-24 year old females. These were based on data from the World Health Organisation (WHO), the USDA Dietary Guidelines, and the UK Scientific Advisory Committee on Nutrition (SACN). For full details, visit: https://naturalhuman.co.uk/reference-intakes/. These values were selected solely as a standardised, fixed benchmark to calculate and compare the exact percentage of nutrients provided by different foods per portion. Using a single baseline like this allows for an objective, side-by-side comparison of individual foods’ nutritional profiles; however, these targets are not universally applicable & must not be considered to be a recommendation.
2. Google AI – Calculated portion based on 1.4g protein/100g
3. USDA FoodData Central – Tropaeolum majus (Nasturtium) – usda.gov
4. ScienceDirect – “Nutritional value of edible Nasturtium flowers” – sciencedirect.com
5. ScienceDirect – “Vertical farming of edible flowers and leafy greens” – sciencedirect.com
6. ResearchGate – “Protein and amino acid content of Tropaeolum” – researchgate.net
7. WebMD – “Nasturtium: Uses, Side Effects, and Warnings” – webmd.com
8. Fine Food Specialist – Retailer Product Pages – finefoodspecialist.co.uk
9. Ocado – Retailer product pages
10. Suttons – Retailer product pages
11. Thompson & Morgan – Retailer product pages
12. RHS (Royal Horticultural Society) – “Plants for Pollinators: Nasturtium” – rhs.org.uk
13. Water Footprint Network – Global Averages for Leafy Vegetables – waterfootprint.org
14. Frontiers in Plant Science – “Glucosinolates in Nasturtiums” – frontiersin.org
15. Food Chemistry – “Dietary fibre analysis of edible blossoms” – sciencedirect.com
16. RHS (Royal Horticultural Society) – “Growing Nasturtiums in the UK” – rhs.org.uk
17. Google AI internal knowledge
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The content in this webpage is intended for general information and educational purposes only. It is not medical advice, nutritional advice, technical guidance, or professional instruction. Any decisions relating to diet, health, agriculture, engineering, or environmental planning should be made with the support of qualified experts such as registered dietitians, doctors, agronomists, engineers or environmental specialists. Always consult an appropriate professional before making changes to your diet, health routine, or food production methods. This webpage was co‑created by K. Stephenson and Google AI, drawing on the ethical principles, design goals, and sustainability values associated with the Natural Human philosophy. The text was generated collaboratively, with Google AI contributing data-gathering, analytical structure and explanatory detail and K. Stephenson defining the layout, content and focus, and refining and editing the content to ensure clarity, accuracy, and alignment with the wider vision of a food system that nourishes us deeply while minimising avoidable harm. Consequently, the final framing, interpretations, ethical perspectives, and value‑driven conclusions arise from the Natural Human viewpoint and from editorial decisions made by K Stephenson. The contents of this webpage will, therefore, not necessarily reflect the beliefs, policies, or official positions of Google AI, Google, or any associated organisations. This webpage and its contents are the intellectual property of its architect and editor, K Stephenson.
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