Susanna Grant’s mission seems to be to make gardening easy for people; particularly people who live in the city, where space is at a premium and buildings huddle together to crowd out the light. From behind an unassuming garden gate in Hackney, her courtyard store Linda glows, filled with the kind of lush, green growth that thrives in these conditions. We talk of shade and weeds, community gardens and cake, perennial window boxes and sending worms through the post.