This Arbor Day season, Pornhub has found a new way to celebrate its commitment to giving America wood.

The adult site says it will plant a tree for every 100 videos watched in the site’s “Big Dick” category. The “Pornhub Gives America Wood” promotion (landing page is porn-free) is part of an ongoing safe-for-work approach to marketing that has helped broaden Pornhub’s buzz.

Recently, AdFreak covered Pornhub’s SFW amateur advertising contest, a witty repository of wink-wink-nudge-nudge visual puns.

But Pornhub is still fairly new to these kinds of promotions. For example, right now there’s no telling where the trees are going. Not wanting to be premature, the site hasn’t chosen a partner to actually plant the trees (more than 13,000 of which have already been earned). Once this limited-time offer is over, Pornhub will choose among Arbor Day Foundation, Trees for the Future and American Forests.

You only have until midnight on May 2 to contribute, so if you love the earth, you better get to work getting off as soon as you get off work.