John Watkins, head of gardens and landscapes at English Heritage, said: "Native daffodils and bluebells as well as the historic cultivated varieties are a vital part of our horticultural and cultural heritage, inspiring gardeners and poets alike."
He added that new hybrids meant the purity of bulbs such as the Narcissus pseudonarcissus was being lost.
English Heritage said: "These native species and historic varieties are in decline, under threat from aggressive hybrids and non-traditional varieties. The planting initiative will help to ensure that England's traditional horticulture is protected for the enjoyment of visitors in 2017 and for years to come."
De Jager Bulbs donated 3,850 native daffodil bulbs to visitors at 11 English Heritage properties, with 50 bulbs to give away each day.
The venues are Audley End, Belsay hall, Brodsworth, Down House, Eltham Palace, Kenilworth Castle, Kenwood, Osborne, Walmer Castle, Witley Court and Wrest Park.
De Jager said the bulbs were Dutch grown but were a native English variety, as stipulated by English Heritage.