Top Ground Gear Force (once referred to as Top Garden Ground Gear Force) was a one-off TV special, featuring the cast of BBC's Top Gear, which originally aired on BBC Two on 14 March 2008 as part of Sport Relief 2008. It was repeated on Easter Monday, 2008.

It borrowed its format from Top Gear of the Pops, a similar one-off special which aired as part of Comic Relief 2007. Whereas Top Gear of The Pops combined Top Gear with Top of the Pops, this episode combines the motoring show with Ground Force, a gardening make-over show which ran on the BBC from 1998-2005.

Regular Top Gear hosts Jeremy Clarkson, James May and Richard Hammond take over sportsman Sir Steve Redgrave's garden, to dispense advice on creating a zero-maintenance lawn, installing an impressive water-feature and getting rid of unwanted plants. Naturally, disaster ensues.