The film version is pure Mills and Boon coupled with Grand Designs, even down to signs that say "20 days to Chelsea build" as the clock ticks.

The film's heart is always in the right place but Mary often seems naive to the point of imbecility and the approach to her story is relentlessly schmaltzy.

There aren't enough supporting story-lines to work alongside the core tale of competing in the Chelsea Flower Show, which struggles to compel, and will have problems appealing to a mainstream, broad audience.