Hartley extended their lead at the top of the Shepherd Neame Kent Cricket League Premier Division to 12 points after crushing struggling Folkestone by 166 runs on Saturday.
The leaders batted first and posted 217-8 from their 50 overs with opener Dan Stickels top-scoring with 51.
Young Kent quick Hugh Bernard took 3-38 from his 10 overs.
The bottom-of-the-table home side were all-out for 51 in reply with Dan Redwood taking 6-25.
Sevenoaks Vine moved up to second after a 16-run win at Bexley after defending 203 all-out.
Miles Richardson made 63 while Michael Stevenson (3-42), Harry Furze (3-32) and Adel Malik (3-24) shared the bowling honours.
Bexley were going well at 150-4 in reply before losing their final six wickets for 37 runs.
Opener Matthew Stiddart scored 70 before being the sixth wicket to fall as Tom Coldman finished with 4-41.
Blackheath are third, two points behind Vine, after beating visiting Sandwich Town by 164 runs.
Warren Lee made 56 as Sandwich restricted the home side to 213-8 with Matthew van Poppel taking 3-26.
Sandwich could only manage 49 in reply with no batsmen making double figures as opening bowlers Tanweer Sikander (6-25) and Jahid Ahmed (4-24) bowled unchanged.
Beckenham drop to fourth after losing for the second consecutive week, this time by seven runs at home against Tunbridge Wells.
Kent batsman Alex Blake (43) and William MacVicar (80) made the major contributions as Beckenham made 241.
Tunbridge Wells replied with 247 with Nick Selman (66) and Robert Sehmi (42) leading the way.
Lordwsood won by six runs at Bromley after posting 217 all-out.
Opener Chris Piesley scored 84 while James Butterfill (5-28) starred with the ball.
Shavawn Cunningham led the run-chase with 93 before the Bromley reply finished on 211-8.