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Partner Garden
Free access for RHS members at selected times

PE10 0LZ

On A151, 4 miles north-west of Bourne.

70 acres

01778 591205

Visit website

Opening Hours

2 Apr–28 Sep, and 22–29 Oct (half term). Please see website for opening times.


Please see website for admission prices.

RHS members

Free access (member 1 only for joint memberships) applies Mon–Thu, Jun & Sep.


  • Assistance dogs only
  • Accessible facilities
  • Baby changing facilities
  • Children’s play area
  • Children's activities
  • Free carer entry
  • Gift shop
  • Group rates
  • Parking
  • Picnic area
  • Plant sales
  • Refreshments
  • Toilets


  • Herbaceous border
  • Pond or lake
  • Woodland

About the garden

Owned by
Sebastian Miller

Grimsthorpe Castle sits within the rolling hills of south Lincolnshire and dates back to the 13th century. Formal gardens were created in the 17th century and it is in this style the gardens greatly remain.

Looking away from the 18th-century Sir John Vanbrugh north front, a wide tree-lined vista carries the visitor's eye over large formal lawns softened with swathes of long grass. To the west of the castle lies a shrub rose border protected from the elements by the first of many long yew hedges. The hedges have been cut into swags so that at regular intervals visitors have framed views of the stunning landscape beyond.

The large west lawn offers uninhibited views of the Capability Brown landscape. Long double herbaceous borders burgeon with large blocks of yellow Achillea, golden Hemerocallis, smoky plumes of Macleaya and whites of Leucanthemums, phlox and Romneya coulteri.  

The south lawns offer fabulous views of the earlier Tudor-style building with wisteria, Magnolia grandiflora and clematis clothing its walls. Either side of a large vista moving south are two yew squares topped with precisely trimmed topiary. These are enhanced by their backdrop of semi-woodland that is home to an abundance of spring colour including narcissi, primulas and bluebells.  

The ornamental kitchen garden is an early example of a formal potager and is filled with seasonal fruit, vegetables, herbs and flowers. Trimmed box, aged quince and medlar trees and espaliered apples and pears add interest. A box-edged parterre is home to beds of red, white, pink and yellow roses and deep blue lavender fill corner beds to enhance the other colours.  

The gardens offer something for everyone from expansive lawns for children and picnicking to topiary and flower borders. The castle is open for guided tours and the parkland is accessible for cyclists and walkers.

Please note: this garden is partially accessible.

Plants of special interest

  • Alliums
  • Daffodils
  • Fruit bushes/trees
  • Grasses
  • Herbs
  • Irises
  • Lavender
  • Shade-loving plants
  • Spring bulbs
  • Topiary
  • Vegetables
  • Wildflowers

Get involved

The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.