Hull earned a winner’s prize of $750,000 (£549,000), kicking off the 2026 season in style by winning on the same course where she claimed her last LET title in 2024.
She was told of her win as she waited on the practice green, replying: “Hooray, at least I can pay my house off now!
“I’ve worked really hard this off season so it’s nice to get a result pretty much straight away. It’s one of the bigger events on the LET and it’s kind of a like a home event for me.”
Hull started the day three shots off the lead and made the turn in two under for the day.
She dropped a second shot of the round on the 10th, but picked up four in the next three holes, with her charge including a 60-foot eagle putt on the par-five 12th.
Further birdies followed at the par-five 15th and 18th, putting the onus on her rivals to match her.
Iwai, who had moved into a share of the lead with a golden touch on the greens, bogeyed the 17th with a damaging three-putt that left her two shots back.
And, after Alexander also bogeyed the penultimate hole, Hull was finally able to celebrate, even after Iwai birdied the last for a 67.
Meanwhile, 24-year-old Rhodes kicked off her campaign to make September’s Solheim Cup team with a superb final round that included six birdies and just one dropped shot.