For the second year running, our charity partner Grow To Know were given space to exhibit at Chelsea Flower Show. But with no budget and a tiny footprint at the fringes of the venue, we knew we needed to do something impactful to cut through. So instead of creating a traditionally beautiful display, we did the opposite. We created a block of concrete with weeds growing out of it to raise awareness of unequal access to green spaces. The result: record-breaking coverage and a "garden" which became the talk of the town.