Toyd Down and Quarry is a 6.7-hectare (17-acre) biological Site of Special Scientific Interest east of Martin in Hampshire.

[1][2] This site is composed of two parts.

Toyd Down is well developed grassland, while the quarry was worked until about 1970.

This makes the site a good subject for studying the colonisation of bare chalk next to a mature species-rich meadow.

Among the early cononisers are basil thyme, carline thistle and mouse-ear hawkweed.