The garden will be open every day from 26th April to 29th April from 10am-9.30pm. There will be BBQ food from Barbeskews Catering and botanical inspired drinks served in the Portobello Road Gin shed, as well as outdoor sofas, plants, flowers and herbs.
Daily free workshops will be led by B&Q experts on how to transform even the smallest space into a "green, wildlife-friendly sanctuary with little effort and minimal cost". BBQ cook and YouTuber, DJ BBQ, will make a special appearance on 29 April at the garden.
B&Q outdoor market director Mike Norton said: "Gardens in London can be small and many have to make do with a small balcony or window sill, but that doesn’t mean that Londoners should miss out on the joys of outdoor space.
"With summer approaching, we wanted to do something really different to remind Londoners how extraordinary a garden can be, and to inspire them to get out and make the most of the spaces they do have, whatever the size."
A B&Q survey of 2,000 people found that a third of us are spending more time looking after plants and flowers than ever, and a quarter say they’re growing more vegetables.
More than one in ten reckon Echinacea is a weed and another tenth don’t know that a dandelion is also a weed.
B&Q's new gardens app helps identify which plant is a weed and which is not.
And its latest range of sheds, garden furniture, watering and fences has been launched, under various own-brand names. Denia, Sakar, Sulana, Saba and Gloria furniture starts at £58. Plancha BBQs start at £20. Neva modular fencing and Verve watering complete the ranges, which differ from rival Homebase/Bunnings by using own brands instead of big brands.