This dataset contains standardised measurements of vegetation height. Vegetation height was recorded along 200 m transects subdivided into four 50 m × 5 m sub-transects. Within each sub-transect, three measurements were taken using a drop disc (disc pasture meter of 40 cm diameter, 3 cm height and approximately 140 g), resulting in twelve measurements per transect and survey round. Sampling was conducted monthly from May to August, with additional partial data available from an April survey in 2022. Vegetation height is reported in centimetres for each of the three replicate measurements per sub-transect. The dataset includes UTC timestamps (ISO 8601 format) and sub-transect identifiers. These data provide information on seasonal changes in vegetation structure and can be linked to flower cover and pollinator datasets collected concurrently at the same sites. Data were collected at multiple restored and reference grassland sites across central, northern, and southern Germany in 2022 and 2023, with site coordinates reported at two-decimal precision (blurred for privacy).