It's usually considered bad luck to wear green on a racecourse but it wasn't that way for Gai Waterhouse who got into the spirit of the carbon neutral race day at Rosehill and duly greeted three winners.The Sydney Turf Club initiative to raise consciousness of the environment attracted a larger than normal January crowd of 7,556 on Saturday.Although the much-hyped two-year-old Manhattan Rain was beaten on debut, Waterhouse had plenty to smile about with wins by Bhutane Dane, Rabbuka and Rock Kin

It's usually considered bad luck to wear green on a racecourse but it wasn't that way for Gai Waterhouse who got into the spirit of the carbon neutral race day at Rosehill and duly greeted three winners.

The Sydney Turf Club initiative to raise consciousness of the environment attracted a larger than normal January crowd of 7,556 on Saturday.

Although the much-hyped two-year-old Manhattan Rain was beaten on debut, Waterhouse had plenty to smile about with wins by Bhutane Dane, Rabbuka and Rock Kingdom, all of whom are destined for bigger things over the autumn.

Waterhouse has Rock Kingdom earmarked for the AJC Australian Derby and he was an impressive all-the-way winner of the Staffing Solutions Handicap (1300m).

"He is so versatile this horse and Nash (Rawiller) used his natural speed," Waterhouse said.

"He will go to the Hobartville Stakes then the Guineas and the Derby.

"He is the best three-year-old racing in Sydney at the moment."

Before Saturday's win, Rock Kingdom ran second to Tempest Tost in the Magic Millions Trophy in which Bhutane Dane was a luckless sixth.

Bhutane Dane's win in the Big6 Handicap (1200m) thrilled Waterhouse.

"He had no luck at all at the Gold Coast and it's wonderful to see him back," Waterhouse said.

"He'll go to the Royal Sovereign Stakes now and then we will see what happens.

"I think he will get up to a mile (1600m)."

Rabbuka also signalled he would be a force during the carnival with his victory in the Green Day At The Gardens Welter (1500m).

A five-year-old half-brother to star three-year-old Northern Meteor, Rabbuka lined up for just his 10th start and his first since May.

Taken straight to the front by Blake Shinn, Rabbuka ($3.60) controlled the race and went on to beat Vision And Power ($2.90 fav) by 2-1/2 lengths with Afghani ($4.20) another length back third.

"Blake sooled him along when he jumped so well and used his speed which was the right thing to do," Waterhouse said.

"He got the other horses off the bit and just controlled things.

"I think it's onward and upward from here."

Rabbuka is owned by Eduardo Cojuangco's Gooree Stud, as is Northern Meteor.

"He is a really nice horse but very lightly raced. He was one of those really floored by EI (equine influenza)," Gooree's Andrew Baddock said.

"It took him longer than some others to recover from it.

"I don't know what Gai has in mind but we might have to look a bit higher for him."

Waterhouse said Rabbuka was among nominations for the Doncaster Mile but there were plenty of other options if he did not make it to the Group One.