Taradale probably needed table-topping Napier Technical Old Boys to slip up against Central Hawke's Bay to retain their Nash Cup title.
But the undefeated Texans won 38-7 at Central Park in Waipukurau and will claim the Cup on Saturday should they beat Tamatea in Napier, having drawn the bye in the last match of the round-robin a week later.
They kept Central scoreless for almost an hour, totting up six tries on their way to a ninth straight victory.
Napier Old Boys Marist also shut out their opposition in the first half, eventually triumphing 38-19 over Hastings R&S in an Elwood Park match in which one player from each side was sent off by top referee Nick Hogan after a brawl.
Outside backs Paoraian Manuel-Harman and Michael Buckley each grabbed doubles for the Green Machine, who sit second on the table.
Havelock North round out the top four following their 65-17 win over Aotea at Anderson Park.
Winger Epeli Tanadroga scored a first-half hat-trick for the Villagers and ended up with four tries on the day.
MAC are breathing down Havelock North's neck in fifth after their 64-13 win over Napier Pirate at Tamatea Park.
Last placed Pirate are still in with a chance for the quarter-finals for the Maddison Trophy though – they are set to duel with Aotea, Central, Clive (who had a bye this weekend) and Tamatea for the final two places over the next fortnight.