23-25 June: Blenheim Palace Flower Show, Blenheim Palace Flower Show, Woodstock, Oxfordshire, OX20 1UL.
24 June: Kingswood, Walton & Tadworth Horticultural Society Early Summer Show, Church Hall, Church of the Good Shepherd, The Avenue, Tadworth, Surrey, KT20 5AS. 2-5pm.
24-25: Maidenhead Open Gardens, Maidenhead, Berks, SL6 1DX. £10 in advance from maidenheadrotary.co.uk/open-gardens.
24-25 June: Arley Hall Garden Festival, Arley Hall and Gardens, Northwich, Cheshire, CW9 6NA. 10am-5pm.
24-25: Benington Lordship Gardens Floral Festival & Open Gardens, Benington, near Stevenage, Hertfordshire, SG2 7BS. 11am-4pm.
25 June: Plant Fairs Roadshow, Herstmonceux Castle, near Hailsham, East Sussex, BN27 1RN. 11am-4pm.
25 June: Hardy Plant Society Devon Group Summer Plant Fair, Burrow Farm Gardens, Old Taunton Road, Dalwood, between Axminster and Honiton, Devon, EX13 7ET. 10am-3pm.
25 June: Plant Hunters’ Fair, Middleton Hall, Middleton,…