Hurst Green came away from the coast with the three points, avenging a heavy home defeat earlier in the season.
Seedall adopted a 4-5-1 formation in an attempt to stem the attacking prowess of the Seasiders.
The early exchanges were tentative, with both sides trying to exert an influence, but with little end product.
Green began to dominate, and were rewarded on 11 minutes, when Cookson’s cross was nodded in by Walker.
Two minutes later, Welch nearly increased the lead but his firm volley sailed over.
Green continued to press, and when they were given a free kick on the left of the box, Bartlett rose majestically to meet Haworth’s wonderful cross, and powered the header into the top corner.
Lytham rallied, and laid siege to the Hurst Green goal as the first half came to an end, but strong defending, particular from Cookson and Barnes, maintained the shut out.
The second half was very much in the same vein as the first, but Green were unable to add to their lead.
Whittaker latched onto fellow substitute Nolan’s cross, only for the keeper to throw himself at his feet to smother the shot.
Lytham forced a first meaningful save from Mahon, before, in the closing moments, Walker’s cross was met by Whittaker on the volley, only to smack off the bar.
Green are on their travels again on Saturday, visiting Furness Rovers.
Green Reserves beat Hesketh Bank 3-0, after their first defeat in seven months at Lytham the previous week.
Centre back Alex Young opened the scoring, before second half strikes from Tom Bamber and Zac Foley.
On Saturday they face a derby against Longridge.