Feeding a city from the world’s largest rooftop greenhouse

(Credit: Unsplash)

This article is brought to you thanks to the collaboration of The European Sting with the World Economic Forum.

Author: Sean Fleming, Senior Writer, Formative Content


  • The world’s largest rooftop greenhouse is in Montreal, Canada.
  • It measures more than 15,000m2 and produces more than 11,000kg of food per week.
  • The company behind it had to hire 200 new employees due to pandemic-driven demand.

Can you grow enough produce for an entire city in rooftop greenhouses? Two entrepreneurs in Montreal, Canada, believe it might be possible.

Lauren Rathmell and Mohamed Hage cofounded Lufa in 2009. The company has four urban gardens in the Canadian city, all in rooftop greenhouses. Lufa’s most recent sits on top of a former warehouse and measures more than 15,000m2 – larger than the other three greenhouses combined. Its main crops are tomatoes and aubergines, producing more than 11,000kg of food per week. It is, the company says, the largest rooftop greenhouse in the world.

An ambitious goal

Rathmell says the new greenhouse will accelerate Lufa’s mission to grow food where people live and help it to meet an “ever-growing demand for fresh, local, and responsible foods”.

The company – which says it’s not trying to replace local farms and food makers, acknowledging that not everything can be grown on rooftops – follows what it calls ‘responsible agriculture’ practices. These include capturing and recirculating rainwater, energy-saving glass panels, and an absence of synthetic pesticides. Any waste is composted and reused, and food is sold directly to customers on the day it is harvested. Lufa also has a fleet of electric vehicles to make those deliveries.

“Our objective at Lufa is to get to the point where we’re feeding everyone in the city,” Hage said in an interview in Fortune. Lufa’s fifth greenhouse is due to open later in 2021.

At the moment, Lufa grows food for around 2% of the city’s population. While that might sound like a modest proportion, interest in urban agriculture is on the rise. Presently, agriculture in urban areas tends to be more common in developing countries. But the UN Food and Agriculture Organization (FAO) favours an increase in urban agriculture, saying it can have “important benefits for food security”.

Urban farming is often more common among poorer members of society.
Urban farming is often more common among poorer members of society. Image: UN FAO

A growing global trend

Urban agriculture has been taking off in other parts of the world in recent years, too – from shipping containers in Brooklyn, New York City, to allotments in unused spaces in Brussels, Belgium.

And at 14,000 m2, there’s Nature Urbaine in Paris – which claims to be the world’s largest urban rooftop farm. Nature Urbaine rents out growing space to Parisians who want to grow their own crops. Tenant farmers pay around $450 per year per 1m2 sized plot. They get a welcome pack with everything they need to start growing, as well as regular access to the Nature Urbine gardening team who are on hand to offer advice and support.

Lufa produces more than 11,000kg of food per week, including tomatoes and aubergines.
Lufa produces more than 11,000kg of food per week, including tomatoes and aubergines. Image: Lufa

Lufa’s first greenhouse was opened in 2011, in Montreal’s Ahuntsic-Cartierville borough, to grow herbs, microgreens, cucumbers and peppers. Two more were added in 2013 and 2017, with the fourth joining last year. It sits on top of a former Sears warehouse in the Saint-Laurent area of the city.

In addition to its own produce, Lufa also sells a selection of other locally made or grown food, including bread, cheese and drinks to its customers. Rising demand for its service, in the wake of the pandemic, led to the company hiring an additional 200 people, and partnering with 35 new farmers and food makers.

the sting Milestones

Featured Stings

Can we feed everyone without unleashing disaster? Read on

These campaigners want to give a quarter of the UK back to nature

How to build a more resilient and inclusive global system

Stopping antimicrobial resistance would cost just USD 2 per person a year

UN chief welcomes South Sudan’s Unity government, lauds parties for ‘significant achievement’

With lifelong learning, you too can join the digital workplace

Legendary Harlem Globetrotters slam-dunk at the UN, with message that brings families, nations together

German stock market is not affected by the Greek debt revolution while Athens is running out of time

A Europe that delivers: EU citizens expect more EU level action in future

Ukraine: Temperatures plunge amid rising humanitarian needs

How to talk about climate change: 5 tips from the front lines

This Canadian start-up turns millions of chopsticks into sustainable furniture

OECD Secretary-General Gurría welcomes announcement of new trade agreement between the US, Mexico and Canada

How tech is helping the agriculture sector curb carbon emissions

2019 data on official development aid & online discussion of ODA’s role in the Covid-19 crisis

Spanish vote – bad luck for Greece: Does Iphigenia need to be sacrificed for favourable winds to blow in Eurozone?

How three US cities are using data to end homelessness

MEPs want to ensure sufficient funding for Connecting Europe’s future

Post-Brexit muddled times: the resignation of UK’s top ambassador and Theresa May’s vague plans

Re-open EU: Commission launches a website to safely resume travelling and tourism in the EU

How to make primary healthcare a favourable career choice for medical students: strategies and reflections

Eastern Partnership: Commission proposes new policy objectives for beyond 2020

What if big-tech companies became non-profits?

South Sudan: UN rights experts see little headway on peace deal amid spike in local-level violence

UN official sees ‘unprecedented opportunities’ to make progress on peace in Afghanistan

Commission supports reform projects in Member States for more jobs and sustainable growth

Polish de facto ban on abortion puts women’s lives at risk, says Parliament

Mobile health technology: Advances, Facilitations and Promotion of Autonomy

Road injuries leading cause of death for the young, despite safety gains: UN report

State aid: Commission approves up to €4 billion French measure to recapitalise Air France

Iran: UN rights chief ‘deeply disturbed’ by continuing executions of juvenile offenders

This afternoon Britain will be once more isolated from mainland Europe

MEPs want ambitious funding for cross-border projects to connect people

EU’s guidelines on net neutrality see the light although grey areas do remain

Why South Africa is on a path of economic renewal

Built by a woman: supporting the dreams of mum entrepreneurs

Texting is a daily source of stress for 1/3 of people – are you one of them?

Pandemic versus fear

A breath of fresh air: How three disused industrial areas became beautiful parks

Will the French let Macron destroy their party political system?

Pro-EU forces won a 70% triumph in the European elections

Norway has successfully enforced its foreign bribery laws but faces potential obstacles

EU is not only obsessed with Facebook but also blaims now innocent websites using social plugins to serve democratic dialogues?

Right-wing “sovranism” harm national identity

EU revengefully shows no mercy to Cameron by demanding a fast and sloppy Brexit now

What wealth managers can learn from family dynamics

How global food safety protects the planet and begins on the farm

OECD: Mind the financial gap that lies ahead

Why collaboration will be key to creating the workforce of the future

Green Deal: How MEPs wish to channel EU investment to sustainable activities

VW emissions scandal: While U.S. car owners are vindicated, Europe still unable to change its laws and protect its consumers

If on a summer’s night: is UK businesses’ “new deal” the only key to the “best of all worlds”?

The needs, challenges and power dynamics of refugee resettlement

A jingoistic Spanish ‘war’ from the past

Euro celebrates its 20th birthday

Students & Allies Unite Globally To Launch #Students_Against_COVID

This team of Saudi women designed an award-winning app to make the Hajj safer

Here’s how we get businesses to harmonize on climate change

Forty-two countries adopt new OECD Principles on Artificial Intelligence

No more lead in PVC to protect public health, say MEPs

‘Multiplicity’ of rights violations in Ukraine as fifth winter of conflict bites

5G: How a ‘legion of robots’ could help save the rhino

It’s Trump’s anti-globalization and inward-looking rhetoric that perturbs GOP and US

‘No shortcuts to a healthier world’: WHO chief sets out health priorities for the decade

More Stings?

Speak your Mind Here

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s