Keep Britain Tidy is to run Love Parks Week following national parks charity GreenSpace's demise in March this year.
KBT already runs the Green Flag Award scheme and decided it would bid for Love Parks Week (July 27-August 4) to run alongside it.
Love Parks Week was launched in 2006 to raise awareness of the importance of green space.
Last year, more than 1,000 events took place during the week, encouraging more than 1.4 million people to head to a park or green space.
KBT said: "Despite the tight timescale to deliver this year’s campaign, we hope it will be another huge success, encouraging hundreds of thousands of people to celebrate the country’s fantastic green spaces."
KBT chief executive Phil Barton said: "We know that parks and green spaces are an essential asset to every community and make a major contribution to people’s health. That is why we were determined that Love Parks Week should be saved.
"By bringing together Love Parks Week and our Green Flag Award programme, our goal is to encourage millions more people to visit, enjoy and take pride in their local parks and green space. Ultimately, we believe everyone has a right to good quality green space on their doorstep and there is a huge body of research shows that they are an essential component of healthy, happy and strong communities.
"In addition, I’m excited at the prospect of a new coalition of organisations coming together in support of a broader year round Love Parks campaign. While it’s early days, the fact that we can use Love Parks as a rallying call to bring the sector together in the face of substantial budget cuts and threats to park services means we can continue to demonstrate just how valuable our parks and green spaces really are."