Tulsa celebrated Arbor Week on Thursday with a tree planting and another national "Tree City U.S.A" designation.
It's the city's 30th year in a row earning the award.
Dozens of Riverfield Country Day students planted 15 new trees in Aaronson Park to celebrate.
Arbor Day is not until April 28, but the city had a good reason for celebrating a little soon.
"Obviously the weather is different across the country so you want to plant the optimum time in your community and the cooler the weather is in general, the better off you are," says Anna America, the Tulsa Parks director. "So it's that sweet spot of trying to find that time when the weather is decent enough to get out here and do this, the ground is thawed, but before it starts getting hot."
Planting toward the end of March in Oklahoma gives the trees a chance to get established ahead of the brutal summer heat.