Owner Linda Laxton has put the spectacular comeback down to wildflower and biodiversity trends.
"It has been amazing," she said.
"There has been a lot of interest in the national press from the beginning of the year and we've just seen a biodiversity conscious Chelsea. Probably 90 per cent of our sales are coming from landscapers and local authorities and there is no doubt about it, lots and lots of people are planting wildflower meadows."
The company sells 3cm plugs in trays of 104 priced £31 plus VAT.
Laxton said orders had ranged from large scale projects like the Royal Opera House's new green roof looking for thousands, to hundreds of small orders for half trays.
She added: "One of my old customers, a Head Gardener at one of the National Trust properties came in the other day, specifically for daisy plants to put into his lawn. He'd spent years using selective weed killers to get rid of them and now he's been instructed to plant them back in."
Changes to planning laws requiring developers to restore sites with more greenery, were also helping Laxton said.