The Carbon Footprint of Cut Flowers: An Honest Answer
A Kenyan rose flown in, or a Dutch one grown next door — which is greener? The answer surprises almost everyone. An honest comparison without greenwashing.
‘Flowers from Kenya? But they're flown halfway around the world!' — we hear this at the counter almost daily. It sounds logical, and yet it is misleading. The truth about the carbon footprint of cut flowers is uncomfortable for anyone hoping for one simple rule. Here is what really counts — and how to orient yourself when buying.
The most common mistake: everyone fixates on transport. In reality, the largest share of a cut flower's emissions does not come from the plane or the truck, but from cultivation — specifically from heating and lighting greenhouses. That changes the whole equation. Counting kilometres alone misses the actual CO₂ driver.
The surprising comparison in numbers: several studies — including one from Cranfield University and one commissioned by Fairtrade — reach the same conclusion. A rose from a heated Dutch winter greenhouse causes several times the emissions of a rose from Kenya, even when the latter is flown in. In one frequently cited calculation, roughly 35,000 kg CO₂ for 12,000 Dutch roses stands against about 6,000 kg for the same quantity from Kenya including the flight. The reason: in Kenya the rose grows in a mild climate under open skies or in unheated poly tunnels — the sun does the work that has to be paid for expensively with gas in a Dutch winter.
Pros and cons listed honestly. In favour of the Kenyan rose: no heating, no artificial lighting, often geothermal energy on the large farms around Lake Naivasha. Against it: the flight, water use in an already dry region, and social questions along the supply chain. In favour of the Dutch rose in summer: short distances, strict EU standards, increasingly geothermal heat and LED. Against it: in winter, the enormous energy hunger of the glasshouses. So there is no blanket ‘good' or ‘bad' origin — it depends on the season and the energy source.
What truly tips the balance is the season. A tulip or peony from German or Dutch open fields in May has a balance that is hard to beat — no heating, barely any transport. The same floral splendour in December means either glasshouse heating or a long-haul flight. So if you want to keep your footprint small, buy not primarily ‘regional' but ‘seasonal'. That is the most honest rule of thumb we can offer.
What is shifting right now — and gives hope. The Dutch industry is electrifying: large heat pumps, geothermal projects and LED instead of sodium lamps are noticeably cutting gas use, driven partly by a CO₂ levy. Kenya, in turn, is expanding sea freight — a rose shipped under refrigeration causes a fraction of the flight emissions. The rigid question ‘flown in or regional?' grows less clear-cut year by year. Which is a good thing.
Our practical decision aid for the bouquet. 1. Ask about the season, not just the country — a sunflower in August is almost always the most climate-friendly choice. 2. Distrust the gut feeling ‘regional equals good': in winter that is often wrong. 3. Look for certifications like Fairtrade or MPS, which audit energy and social standards. 4. Bet on longevity: an A1-grade flower that lasts two weeks spreads its footprint over twice as many days of joy as a cheap bunch that wilts after four. 5. Consider alternatives — dried flowers and slow-flower concepts from local field cultivation shift the equation fundamentally once more.
Frequently asked
- Are flowers from Kenya really more climate-friendly than Dutch ones despite the flight?
- In the winter half of the year, usually yes. According to several studies, heating and lighting Dutch greenhouses causes several times the emissions that the flight from Kenya adds. In summer the picture reverses: then a field-grown regional flower is hard to beat. So the season is the deciding factor.
- Which cut flowers have the best carbon footprint?
- Seasonal field flowers from local or Dutch cultivation — such as tulips in spring, peonies in early summer, sunflowers and asters in late summer. They grow without heating and travel short distances. Long-lasting A1-grade quality also improves the balance, because the footprint is spread over more days of joy.
- What matters more for the climate balance — transport or cultivation?
- Cultivation, clearly. For cut flowers from heated winter greenhouses, the lion's share of emissions comes from heating and artificial lighting, not from transport. That is why a flower flown in from a sunny growing country can score better than a ‘regional' one from a glasshouse.
- What can I look for when buying to give a more climate-friendly gift?
- Ask about the season rather than just the country, look for labels like Fairtrade or MPS, and favour long-lasting quality. At the Rhein-Maas flower auction we deliberately select by longevity and origin — and advise honestly on what is in season. Dried flowers are another option with a very low footprint.