Homegrown herbs aren't free – they just hide their costs better than supplier invoices. You've got seeds, soil, water bills, and hours of your time wrapped up in those sprigs of basil. Most kitchen managers discover too late that ignoring these costs inflates their profit margins by 15-20%.
Why your herbs have hidden price tags
No invoice doesn't mean no cost. You're investing time in sowing, watering, and harvesting. Plus there's seeds, potting soil, and maybe a greenhouse or containers to consider.
⚠️ Watch out:
Skip these costs and you'll overestimate profit margins. With multiple homemade ingredients, this creates hundreds of euros in phantom profits monthly.
Calculate real costs per kilogram
Fair cost pricing means adding up everything and dividing by your harvest yield.
- Material costs: seeds, potting soil, containers, water
- Labor costs: time for sowing, maintenance, harvesting
- Space costs: greenhouse, electricity for grow lights
- Waste factor: not everything grows perfectly
💡 Basil breakdown:
You grow basil for pizzas and harvest 2 kg monthly.
- Seeds and potting soil: €15
- Water and electricity: €8
- Your time (2 hours × €20): €40
- Waste allowance (20%): €13 extra
Total costs: €76 for 2 kg = €38 per kilo
Compare against supplier pricing
Check what identical quality costs from wholesalers. Fresh basil typically runs €25-35 per kilo. If your cost exceeds this, homegrown becomes the expensive option.
💡 Reality check:
Your basil costs €38/kg. Supplier charges €30/kg for fresh basil.
Result: Homegrown costs €8 per kilo more. At 2 kg monthly = €192 yearly in hidden expenses.
Value your labor honestly
Your time carries value, even evening garden work. Calculate minimum €15-20 hourly. Track everything: sowing, watering, harvesting, cleaning up.
- Daily watering: 5 minutes
- Weekly maintenance: 15 minutes
- Each harvest: 30 minutes
- Replanting sessions: 45 minutes
Account for seasonal swings
Winter reduces yields while increasing artificial light needs. Or you'll supplement with supplier purchases. Calculate using full-year averages.
⚠️ Watch out:
Winter costs can spike 50-100% higher from artificial lighting and heating. Build this into annual averages.
Benefits worth considering
Despite costs, homegrown herbs offer real advantages:
- Quality: Always fresh, zero transport time
- Uniqueness: Rare varieties suppliers don't stock
- Marketing: "Homegrown" sells dishes
- Supply security: No delivery failures
These benefits might justify extra costs, but include them in your pricing calculations.
System registration
Treat homegrown herbs like purchased ingredients. Set cost per kilo and update quarterly. Food cost calculators like KitchenNmbrs let you add custom ingredients with calculated pricing.
How do you calculate the cost price of homegrown herbs?
Add up all material costs
Calculate seeds, potting soil, containers, water, and electricity together. Don't forget small things like labels or tools. Divide this by the number of months you use it for.
Calculate your labor costs
Track for a week how much time you spend on your herb garden. Multiply by €15-20 per hour. Add up daily watering, weekly care, and harvesting.
Measure your actual harvest
Weigh what you harvest over 3 months. Subtract 20% for waste and seasonal variations. Divide your total costs by your net harvest for the cost price per kilo.
✨ Pro tip
Track your actual garden time for 6 weeks – most restaurant owners underestimate by 40-60%. Set a phone timer each time you tend herbs to get real numbers.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
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Frequently asked questions
Should I count my own time as a cost?
Absolutely count your time. Even spare-time gardening has value – calculate minimum €15-20 hourly. Skip this and you'll underestimate true growing costs significantly.
What if homegrown herbs cost more than buying them?
You've got two choices: stop growing and buy instead, or justify extra costs through superior quality and marketing value. But calculate honestly first.
How often should I recalculate cost prices?
Quarterly minimum, since seasons dramatically affect costs. Winter energy and labor expenses often double due to artificial lighting and slower growth rates.
⚠️ EU Regulation 1169/2011 — Allergen Information — https://eur-lex.europa.eu/eli/reg/2011/1169/oj
The allergen information on this page is based on EU Regulation 1169/2011. Recipes and ingredients may vary by supplier. Always verify current allergen information with your supplier and communicate this correctly to your guests. KitchenNmbrs is not liable for allergic reactions.
In the UK, the FSA enforces allergen regulations under the Food Information Regulations 2014.
📚 Sources consulted
- EU Verordening 852/2004 — Levensmiddelenhygiëne (2004) — Official source
- EU Verordening 853/2004 — Hygiënevoorschriften voor levensmiddelen van dierlijke oorsprong (2004) — Official source
- EU Verordening 1169/2011 — Voedselinformatie aan consumenten (2011) — Official source
- NVWA — Hygiënecode voor de horeca (2024) — Official source
- NVWA — Allergenen in voedsel (2024) — Official source
- Codex Alimentarius — International Food Standards (2024) — Official source
- FSA — Safer food, better business (HACCP) (2024) — Official source
- BVL — Lebensmittelhygiene (HACCP) (2024) — Official source
- Warenwetbesluit Bereiding en behandeling van levensmiddelen (2024) — Official source
- WHO — Foodborne diseases estimates (2024) — Official source
Food Standards Agency (FSA) — https://www.food.gov.uk
The HACCP standards shown in this application are for informational purposes only. KitchenNmbrs does not guarantee that displayed values are current or complete. Always consult the FSA or your local authority for the latest regulations.
Written by
Jeffrey Smit
Founder & CEO of KitchenNmbrs
Jeffrey Smit built KitchenNmbrs from 8 years of hands-on experience as kitchen manager at 1NUL8 Group in Rotterdam. His mission: give every restaurant owner control over food cost.
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